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pair_29737678 | The actual evapotranspiration was modelled utilizing the boreal ecosystem productivity simulator (BEPS) in Huaihe River Basin from 2001 to 2012. In the meantime, the quantitative analyses of the spatial-temporal variations of actual evapotranspiration characteristics and its influencing factors under different vegetati... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | None | zh-cn |
pair_29737677 | Landscape connectivity describes the organic connections of landscape components in terms of landscape pattern, process, and function. We used land-cover data in 1986, 2000, and 2011, to study the changes of landscape connectivity for ecological lands (forest, grassland, and wetland) in the middle reaches of the Heihe ... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 景观连接度描述了景观组分在景观格局、过程和功能上的有机联系.本文利用1986、2000和2011年土地覆被数据,基于图论方法,研究了黑河中游生态用地(林地、草地、湿地)景观连接性动态变化,并通过分析不同阈值下景观连接度值的变化揭示了研究区景观的适宜阈值.结果表明: 黑河中游1986—2011年对景观连接度产生重要作用的生态斑块面积呈减少趋势.湿地斑块面积2000—2011年减少幅度较大;草地斑块数量先减少后增加,面积变化不大,但是有斑块破碎化的趋势.不同阈值下景观连接度值的变化验证了距离阈值的正向作用.400~800 m是研究黑河中游物种扩散和生态流运行的适宜距离阈值.选择600 m作为距离阈值时,大型斑块对区域总体景观连接水平影响... | zh-cn |
pair_29737682 | Human demand for various ecosystem services continues to increase. The previous studies focused mainly on using economic methods to assess ecosystem service values, but few studies took social attributes and spatial heterogeneity into consideration. In this paper, we selected Wusong Paotaiwan Wetland Forest Park in Sha... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 人类活动对生态系统不同服务的多样化需求日益增长,传统的生态系统服务价值评估实践多以经济学方法为主,较少关注社会属性和空间异质性.本文选取上海市吴淞炮台湾湿地森林公园作为研究对象,采用SolVES模型对其美学、生物多样性、文化、娱乐等服务的社会价值进行量化和空间分析.结果表明: 公园的热点区域集中在草坪乐园、吴淞炮台纪念广场、临江观景台等视野开阔或临近水景观的区域;游客对公园内美学、历史、生物多样性、娱乐、文化、康体健身价值较为偏好;水景观和路网布局影响游客对不同社会价值的偏好程度,美学、生物多样性、娱乐和康体健身价值高低与距水体远近在一定范围内呈显著负相关关系,美学和康体健身价值高低与距道路远近呈显著负相关关系;游憩频率影响游客对生... | zh-cn |
pair_29737683 | In this study, we explored the feasibility of estimating the soil heavy metal concentrations using the hyperspectral satellite image. The concentration of As, Pb, Zn and Cd elements in 48 topsoil samples collected from the field in Yushu County of the Sanjiangyuan regions was measured in the laboratory. We then extract... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 本研究主要探讨了利用Hyperion影像植被光谱估算土壤重金属含量的可行性.以野外采集的三江源区玉树县48个表层土壤样品As、Pb、Zn、Cd实验室测定含量值,以及从两景Hyperion影像提取的48个土壤样本点相应的176个植被光谱反射率波段及构建的5种植被指数为数据源,利用偏最小二乘回归方法(PLSR)建立土壤各重金属含量与上述两套Hyperion影像上提取的变量之间的估算模型.模型分别为176个植被光谱反射率波段与土壤各重金属含量间的估算模型(植被光谱反射率模型),和以5种植被指数作为自变量,与土壤各重金属含量建立的估算模型(综合植被指数模型).运用验证样本的4种重金属元素实测含量值的标准差与均方根误差的比值(RPD)作为检验... | zh-cn |
pair_29737684 | Three economic patterns, i.e., Zhujiang Model, Wenzhou Model and Sunan Model, were all generated in the developed areas of China. Sustainability assessment of those areas plays an important role in guiding future development of the economy of China. Genuine progress indicator (GPI) was adopted in this study to evaluate... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | “珠江模式”、“温州模式”、“苏南模式”的发源地是中国经济发展的前沿地带,评估其可持续发展情况对中国经济的下一步发展具有重要的指导意义.本文采用真实发展指标(GPI),评估了1995—2012年中国“三大经济模式”下广州、深圳、温州、苏州、无锡、常州6个典型城市的可持续发展情况.结果表明: 研究期间,6个城市的GDP呈指数型增长,但GPI在1995—2005年间并无增长,2005年以后才开始上升,GPI与GDP的差距越来越大;“珠江模式”虽然经济增长迅猛,但经济、社会、环境损耗突出,实现其可持续发展必须解决分配不均、交通拥堵、环境污染等问题;“温州模式”人均GPI后期与其他城市拉开差距,发展后劲不足,贫富差距突出,社会账户水平较低且... | zh-cn |
pair_29737687 | Ozone is one of the main atmospheric pollutants over surface layer, and its increasing surface ozone concentration and its impact on main crops have become the focus of the public. In order to explore ozone deposition law and environmental factors influencing ozone deposition process, this study used the micrometeorolo... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 地表臭氧作为近地层最主要的大气污染物之一,其不断上升的浓度及其对粮食作物的影响受到越来越多的关注.本研究利用微气象学观测方法,探明自然条件下冬麦田的臭氧沉降过程,分析了影响臭氧沉降过程的环境因子.结果表明: 观测期内(小麦生长旺期)臭氧通量均值为-0.35 μg·m<sup>-2</sup>·s<sup>-1</sup>(负号表示沉降方向指向地面),臭氧沉降平均速率为0.55 cm·s<sup>-1</sup>,空气动力学阻力均值为30 s·m<sup>-1</sup>,粘性副层阻力均值为257 s·m<sup>-1</sup>,冠层阻力均值为163 s·m<sup>-1</sup>,且均存在明显的日变化趋势.臭氧沉降阻力大小受摩擦... | zh-cn |
pair_29737690 | Taking 6-year-old 'Chunjie' peach as test material, and the peach in natural condition as the control, this paper investigated induced effects of long-day and short-day photoperiod on dormancy and responses of chilling resistance to photoperiodic induction during dormancy induction process. The results showed that the ... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | None | zh-cn |
pair_29737686 | Soil moisture is an important component of the soil-vegetation-atmosphere continuum (SPAC). It is a key factor to determine the water status of terrestrial ecosystems, and is also the main source of water supply for crops. In order to estimate soil moisture at different soil depths at a station scale, based on the ener... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 土壤水分是土壤-植被-大气连续体的一个重要组分,是决定陆地生态系统水分状况的关键因子,也是作物的水分供应库.为了估算站点尺度不同深度的土壤水分,基于下垫面能量平衡方程和水分亏缺指数,提出了基于地面遥感信息(归一化植被指数和下垫面温度)和气温估算土壤相对湿度方法.利用2014年中国气象局固城生态与农业气象试验站夏玉米水分控制试验资料验证的结果表明: 该方法可以有效估算不同深度的土壤相对湿度,陆地生态系统的潜在干旱程度即实际蒸散与潜在蒸散之比与不同深度土壤湿度呈显著的线性关系.其中,0~10 cm土层的土壤水分估算精度最高,决定系数达0.90;0~20 cm到0~50 cm土层土壤水分估算的平均相对误差均在15%以内,相对均方根误差均在... | zh-cn |
pair_29737694 | Metabolisms are fundamental processes of organisms. They are related to carbon and water cycling of a plant. The relationship between the metabolic rate and the body size of an organism has been a hot spot in ecological research. The typical WBE model with 3/4 power has been controversial. This study tested the applica... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 新陈代谢速率是植物最基本的生物学速率,与地表植被的水碳代谢过程密切相关.表征代谢速率及其替代指标(如叶生物量等)与个体大小间相关生长关系的代谢指数是生态学研究的一个热点,WBE模型论证的3/4恒定代谢指数最为经典,但也饱受争议.本研究以毛乌素沙地南缘沙柳为对象,检验了WBE模型的可用性,揭示代谢指数随丛生枝生长发育的变化规律.结果表明: 基于叶生物量和茎叶生物量估计的沙柳丛生枝代谢指数<i>α</i>为0.97,显著大于WBE模型的恒定指数3/4;分支半径指数1/<i>a</i>和分支长度指数1/<i>b</i>分别为2.67和3.83,均显著大于理论值2.0和3.0.分龄级估计的丛生枝分支半径指数和分支长度指数分别为2.64~3.... | zh-cn |
pair_29737698 | The characteristics of ammonia volatilization and nitrous oxide emission from a paddy soil were examined under 9-year application of different slow/controlled release urea with the common large granule urea (U) as the control. The results showed that compared with the control, all slow/controlled release urea treatment... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | None | zh-cn |
pair_29737699 | Nitrogen accumulation, translocation and allocation were investigated in a field experiment to find out the difference between six semi-winterness wheat cultivars and nine springness wheat cultivars that are mainly grown in Jiangsu. Results indicated that the average nitrogen accumulation amount (NAA) in the semi-winte... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 以江苏省6个半冬性和9个春性小麦品种为材料,研究两类型小麦品种在大田条件下的氮素积累、运转和分配差异.结果表明: 施氮量相同条件下,半冬性小麦群体植株平均氮素积累量在越冬始期-拔节期低于春性小麦群体,孕穗期-成熟期高于春性小麦群体;氮素阶段累积量在越冬始期-拔节期两类型群体间差异不显著,开花-成熟期半冬性群体显著高于春性群体.半冬性小麦平均总氮素转运量、花后积累量显著高于春性小麦;两种类型小麦总氮素转运率、积累氮贡献率、总转运氮贡献率差异均不显著.半冬性小麦营养器官中叶片氮素转运量、转运率、转运氮贡献率均低于春性小麦,茎鞘氮素转运量、转运率、转运氮贡献率则高于春性小麦,茎鞘氮素转运量差异达显著水平;同一类型内不同品种间植株氮素积累量... | zh-cn |
pair_29737700 | A field experiment was conducted on fluvo-aquic soil in the North China Plain to study the effects of nitrogen application rate on soil nitrogen contents and enzyme activities in rhizosphere and non-rhizosphere of summer maize. The results showed that the soil enzyme activities under different nitrogen application rate... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 在华北平原潮土上进行田间试验,研究施氮量对夏玉米根际和非根际土壤酶活性及氮含量的影响.结果表明: 不同施氮水平下土壤酶活性均表现出一致的季节性变化趋势.与不施氮处理相比,施氮处理能显著提高根际和非根际土壤硝态氮含量及根际土壤铵态氮含量,显著增强土壤几丁质酶、β-葡萄糖苷酶、纤维素酶和木聚糖酶活性.在整个玉米生育期内,非根际土壤硝态氮含量显著高于根际土壤;非根际土壤铵态氮含量在灌浆期显著高于根际土壤,但在苗期和完熟期则显著低于根际土壤;根际土壤几丁质酶、β-葡萄糖苷酶、纤维素酶和木聚糖酶活性都显著高于非根际土壤.施氮对土壤有机质含量没有显著影响;在0~180 kg·hm<sup>-2</sup>施氮范围内,施氮可明显增加土壤全氮含量,... | zh-cn |
pair_29737705 | Temperature and photoperiod are proximate environmental factors that have an important influence on the morphological, physiological and behavioral adjustments animals performance du-ring seasonal acclimatization. In this study, the effects of temperature and photoperiod on phenotypic flexibility in body mass, energy b... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 温度与光周期是环境季节性变化的最直接表现因子及时间变化指示标志,对动物的形态、生理及行为产生重要的影响.本文以白头鹎为研究对象,探讨了不同温度与光周期对其体质量、能量收支和消化道形态的影响,分析了能量收支与消化道形态特征的关系.将28只白头鹎(12雄16雌)分为4组:暖温长光组(30℃,16 L8 D;3雄4雌)、暖温短光组(30 ℃,8 L16 D;3雄4雌)、低温长光组(10 ℃,16 L8 D;3雄4雌)和低温短光组(10 ℃,8 L16 D;3雄4雌).结果表明: 低温与短光照可促进白头鹎的体质量、摄入能及同化能明显增加,同时温度与光周期的交互作用对白头鹎的摄入能及同化能影响显著.低温条件下,胃、小肠、直肠及总消化道... | zh-cn |
pair_29737707 | In May, July and September 2012, four treatment plots with different concentrations of effective microorganisms (EM) compost were established (control, low, medium, and high concentration) in a typical black soil farmland in Harbin. We investigated the effects of different EM compost concentrations on the composition, ... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 2012年5、7和9月在哈尔滨市典型黑土农田区,采用定点试验的方法设置空白对照、低浓度、中浓度和高浓度4个处理样地,分析不同浓度EM堆肥处理对中小型土壤动物群落组成、垂直结构、季节性动态和多样性的影响.结果表明: 不同浓度EM堆肥处理下共捕获中小型土壤动物7860只,平均密度49125只·m<sup>-2</sup>,隶属于3纲10目,划分为30个类群.EM堆肥处理增加了中小型土壤动物类群数量,低浓度处理中小型土壤动物个体密度低于空白对照样地,但随着EM堆肥浓度的增加,中小型土壤动物个体密度均有所增加;中小型土壤动物群落的类群数和个体密度的垂直分布具有表聚性特征;中小型土壤动物群落存在一定的季节变化特征;不同浓度EM堆肥处理样地中小... | zh-cn |
pair_29737709 | Biological characteristics, density and its spatial distribution of Portunus trituberculatus in Laizhou Bay, together with the impact of environmental factors, were analyzed based on the bottom trawl data of 9 surveys from May 2011 to April 2012, in order to provide scientific basis for utilizing and protecting the res... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 根据2011年5月—2012年4月进行的9个航次(月份)的底拖网调查,研究了莱州湾水域三疣梭子蟹的生物学特征、数量分布以及环境因子的影响.结果表明: 莱州湾三疣梭子蟹生物量密度的月间排序为9月>10月>7月>8月>6月>11月>3月>5月>4月.其中1龄以下个体占绝对优势,2011年7—10月4个航次所占比例平均值为86.1%.9个航次中,三疣梭子蟹的体质量、头胸甲宽及头胸甲长的平均值均以8月最高、4月最低.7—11月,雌、雄个体肥满度均以8月最高,分别为1.030和1.023,7月最低,雌雄均为1.007;雌雄个体肥满度的性别差异不显著.除6—8月外,其他月份性比(雌/雄)均小于1.0.莱州湾三疣梭子蟹5—7月主要集中在黄河口、龙... | zh-cn |
pair_29737711 | The formation of resting eggs is an important survival strategy for copepods. The abundance of resting eggs in sediment is of great significance to the recruitment of copepod population in aquatic environment. Desiccation is an important approach of aquaculture management in ponds, which has great influences on pond ec... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 休眠卵是桡足类的重要生存策略,其在沉积物中的丰度对水体种群的补充具有重要意义.干塘是池塘养殖管理的重要措施,对池塘生态系统具有重要影响.2014年2月15日(干塘前)和3月2日(干塘后),分别采集广州市南沙区养殖池塘内表层沉积物,研究沉积物中桡足类休眠卵对浮游种群的潜在补充及影响因素.结果表明: 干塘前未冷藏沉积物样品在盐度20时的潜在补充量和孵化率最高,4 ℃冷藏4周后最高值出现在盐度为15的处理组.干塘后未冷藏沉积物样品在盐度15时的潜在补充量和孵化率最高,冷藏4周后最高值出现在盐度为20的处理组.这说明干塘前桡足类休眠卵的潜在补充量显著高于干塘后,且干塘对沉积物中休眠卵的持续孵化时间有影响. | zh-cn |
pair_29737710 | To investigate the effects of starvation and re-feeding on survival rate, behavior, growth and digestive enzyme activities of juvenile Sepia pharaonis, the manipulative laboratory experiments were conducted with 0-6 days of starvation and 15 days of re-feeding to reveal the mechanism of compensatory growth. The results... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 本文探究了饥饿胁迫与饥饿后再投喂对虎斑乌贼幼体存活率、生长、行为、肝体比、摄食率以及消化酶活力的影响.在室内控制条件下开展了幼体(初始体质量为4.95±0.48 g)的饥饿(0、1、2、3、4、5、6 d)和再投喂(15 d)试验.结果表明: 不同饥饿时间对虎斑乌贼的幼体存活率、体质量降低率、肝体比和消化酶活力影响显著.随着饥饿胁迫时间的增加,其存活率、肝体比呈下降趋势,其中饥饿3 d后,存活率开始明显下降,体质量降低率明显增大,幼体出现喷墨、互相残杀等异常行为;4种消化酶活力呈先下降后上升的趋势,淀粉酶活力以饥饿4 d组最低 (0.07±0.02 U·mg<sup>-1</sup>·prot<sup>-1</sup>);脂肪酶活力... | zh-cn |
pair_29737713 | With the rapid development of metropolises worldwide, the urban heat island (UHI) effect is becoming a serious environmental problem in recent years. The rapidly increasing anthropogenic heat (AH) from human activities has more significant impacts on urban microclimate which aggravates the UHI effect. The characteristi... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 近年来随着全球大都市的快速发展,热岛效应成为城市环境的严峻问题.人类活动日益增加的排热会显著改变城市热环境,从而加剧城市热岛效应的恶化.不同气候区、不同尺度的人为热排放特征不同,因此,其时空变化使人为热的计算变得复杂和不确定.本文通过对国内外人为热的不同计算方法结合实例进行综述,总结了其时空尺度、所需的基础数据及误差来源等,最后讨论了不同方法的优缺点并提出改良方向.建议人为热研究需要首先考虑时空尺度,并据此选择合适的计算方法以保障精度.人为热的计算有助于学者更好地理解研究区的排热状况,并通过合理的城市规划改善人居热环境. | zh-cn |
pair_29737714 | Experimental test is one of the major test methods of ecological hypothesis, though there are many arguments due to null hypothesis. Quinn and Dunham (1983) analyzed the hypothesis deduction model from Platt (1964) and thus stated that there is no null hypothesis in ecology that can be strictly tested by experiments. F... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 试验方法是生态学假说的主要验证方法之一,但也存在由原假说引发的质疑.Quinn和Dunham(1983)通过对Platt(1964)的假说-演绎模型进行分析,主张生态学不可能存在可以严格被试验验证的原假说.Fisher的证伪主义与Neyman-Pearson(N-P)的非判决性使得统计学原假说不能被严格验证;而生态过程中存在的不同于经典物理学的原假说<i>H</i><sub>0</sub>(<i>α</i>=1,<i>β</i>=0)与不同的备假说<i>H</i><sub>1</sub>′(<i>α</i>′=1,<i>β</i>′=0)的情况,使得生态学原假说也很难得到严格的实验验证.通过降低<i>P</i>值、谨慎选择原假说、对... | zh-cn |
pair_29737712 | The composting experiments on three manures (cattle, pig and chicken manures) were carried out to study the maturity indexes by monitoring their physical and chemical properties, seed germination index (GI), and characterizing chemical structures using Fourier transform infrared (FTIR) spectroscopy. Results showed that... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 选择新鲜的牛粪、猪粪和鸡粪为堆肥原料,通过室内模拟直接堆肥试验,研究堆肥过程理化参数变化、种子发芽指数以及腐熟物红外光谱特征.结果表明: 堆肥过程温度变化明显,牛粪出现一次堆肥高温阶段,鸡粪和猪粪各两次,堆肥温度超过50 ℃以上时间均大于10 d,温度可以最直观地表征堆肥的腐熟程度.堆肥过程中pH值变化幅度较大,其中猪粪的pH值从6.63上升至7.74,鸡粪从7.73上升至8.66,牛粪则先从7.86上升至8.36再下降至7.52;有机碳含量逐渐降低,牛粪、猪粪和鸡粪分别下降23.3%、28.2%和31.7%;堆肥过程中,牛粪、猪粪和鸡粪的铵态氮含量分别下降87.8%、73.6%和79.7%,硝态氮含量分别增加至堆肥前的56.81、... | zh-cn |
pair_29738159 | To investigate the expression characteristics of the USP24 gene in the mouse testis and its role in spermatogenesis. We examined the expression characteristics of USP24 in the testis tissues of wild-type mice at different postnatal weeks (PNW) and androgen receptor (AR)-knockout (ARKO) adult mice using real-time quanti... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目的: 研究去泛素化酶24(USP24)基因在小鼠睾丸精子发生过程中的表达特征,初步探讨其在生精过程中的作用。方法: 通过实时荧光定量PCR(qPCR)和免疫荧光等方法检测USP24在不同周龄野生型小鼠睾丸组织以及成年雄激素受体敲除(ARKO)小鼠睾丸中的表达特征;采用双荧光素酶报告基因实验检测USP24启动子转录活性。结果: qPCR和免疫荧光结果表明,USP24基因在出生1周时表达水平较低,3周时急剧升高,随后维持在相似水平至第8周;USP24主要定位于支持细胞和生精细胞的细胞质;与野生型相比,USP24在ARKO 小鼠睾丸表达降低;性成熟小鼠睾丸中,USP24定位于成熟精子头部后端及中部。双荧光素酶报告基因实验结果显示,睾酮刺... | zh-cn |
pair_29738160 | To investigate the effect of small interfering RNA silencing the vitamin D receptor (VDR) on the biological behavior of prostate cancer PC-3 cells. We constructed the VDR-shRNA lentiviral vector and determined the mRNA and protein expressions of VDR by RT-PCR and Western blot. Using scratch wound healing and Transwell ... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目的: 探讨小干扰RNA靶向沉默维生素D受体(VDR)对前列腺癌PC-3细胞生物学行为的影响。 方法: 构建VDR-shRNA慢病毒载体,用RT-PCR和Western 印迹法分别检测VDR的mRNA和蛋白表达水平;通过细胞划痕愈合实验和Transwell小室检测VDR被沉默后的PC-3细胞迁移能力和侵袭性的变化。 结果: VDR-shRNA质粒显著干扰VDR表达,并成功筛选VDR-shRNA干扰稳定的细胞株;细胞划痕实验结果显示划痕愈合率VDR干扰组为59% 明显低于空白对照组73.6%和LV3阴性对照组的77.8%,组间差异有显著性(P<0.05),空白对照组和LV3阴性对照组组间差异无显著性(P>0.05)。Transwell... | zh-cn |
pair_29738161 | To investigate the relationship of the serum adiponectin level with the development of prostate cancer (PCa) and its influence on the biological characteristics of PCa cells. This retrospective case-control study included 45 cases of PCa and 50 non-PCa controls. We analyzed the relationship of the serum adiponectin lev... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目的: 研究血清脂联素水平与前列腺癌发生的关系以及脂联素对前列腺癌细胞生物学特性的影响。方法: 采用病例对照试验回顾性分析45例前列腺癌患者(病例组)和50例非前列腺癌患者(对照组)血清脂联素水平和前列腺癌发生之间的关系。利用慢病毒载体构建脂联素受体缺陷的稳转细胞株,用脂联素干预前列腺癌细胞系并通过CCK-8实验、流式细胞实验、成管实验和划痕实验分析脂联素作用升高和降低对PC3细胞生物学行为的影响。结果: 与对照组患者[(6.35±4.43) μg/ml]比较,病例组血清脂联素水平[(3.49±2.70) μg/ml]降低,并且脂联素水平与Gleason评分高低呈负相关(r=-0.504, P<0.01)。脂联素抑制PC3细胞的增殖... | zh-cn |
pair_29738162 | To investigate the safety and effectiveness of radical retropubic prostatectomy (RRP) with adjuvant androgen deprivation or external radiotherapy in the treatment of prostate cancer (PCa) with pelvic lymph node metastasis (PLNM). Twenty PCa patients underwent bilateral pedal lymphangiography (PLG) preoperatively, and 1... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目的: 探讨耻骨后根治性前列腺切除结合辅助内分泌治疗或局部外放疗治疗20例前列腺癌伴盆腔淋巴结转移的安全性和疗效。 方法: 术前对20例前列腺癌患者均行双侧足背淋巴管造影,对其中11例盆腔可疑淋巴结穿刺抽吸淋巴液,进行实时定量PCR(RT- PCR)检测淋巴液PSA mRNA和前列腺特异膜抗原(PSMA)mRNA的表达。20例均行耻骨后根治性前列腺切除和扩大盆腔淋巴结清扫,对其中3例切端阳性者待尿失禁控制后给予外放疗。 结果: 11例经RT- PCR检测淋巴结液PSA mRNA和PSMA mRNA阳性表达中均经病理证实为前列腺癌淋巴结转移。术中失血量中位数 575 ml, 术中输血5例。手术切缘阳性3例,漏尿和淋巴漏各2例,无尿失禁... | zh-cn |
pair_29738163 | To investigate the effect of laparoscopic extraperitoneal (LSEP) high ligation of the spermatic vein in the treatment of varicocele. We retrospectively analyzed the clinical data about 80 cases of varieocele, 48 treated by LSEP and the other 32 by laparoscopic transabdominal retroperitoneal (LSTR) high ligation of the ... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目的: 观察经腹膜外途径腹腔镜下治疗双侧精索静脉曲张高位结扎的疗效。方法: 回顾性分析48例经腹膜外途经腹腔镜下精索静脉高位结扎术及32例经腹腔途经腹腔镜下精索静脉高位结扎术患者。比较两组患者术前、术后l、3、6个月的精液质量变化情况,两组患者术中出血量、手术时间、术后胃肠功能恢复时间、术后并发症(皮下血肿、阴囊及皮下气肿、精索静脉曲张复发)以及配偶妊娠率等情况。结果: 经腹膜外组和经腹腔组术后精液质量参数均较术前有明显改善(P<0.05),但是术后1、3、6个月的精液质量参数比较无统计学差异(P>0.05);两组术中出血量、手术时间[(38.27±9.23) min vs (43.46±11.72) min],无明显差异(P>0.... | zh-cn |
pair_29738164 | To analyze the correlations of seminal plasma (sp) anti-Müllerian hormone (spAMH) and inhibin B (spINHB) and serum INHB (serINHB) with semen parameters in oligoasthenospermia patients and explore their value in predicting the outcome of routine in vitro fertilization (IVF). We obtained the levels of spAMH, spINHB and s... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目的: 分析精浆AMH、INHB及血清INHB与少弱精子症患者精液参数之间的相关性,同时探讨对其常规体外受精(IVF)结局的预测价值及影响。方法: 收集2016年8月至2017年2月因男方少弱精子症或女方输卵管因素就诊于宁夏医科大学总医院生殖中心行IVF助孕的88例不孕夫妇的临床资料,检测精浆AMH、INHB、血清INHB及精液参数(精子活动率、浓度、总数、前向运动精子百分率及正常形态精子百分率),采用受试者工作特征曲线(ROC)分析精浆AMH、INHB、血清INHB及精液参数对其受精率的预测能力;Pearson 相关分析检验精浆 AMH、INHB及血清INHB 与精液参数之间的关系,均设定 P<0.05 为有统计学差异。结果: 精... | zh-cn |
pair_29738165 | To study the changes of the serum zinc alpha 2 glycoprotein (ZAG) level in men and its relationship with blood lipid male reproductive hormones. We enrolled 297 men aged 25- 65 years in this study, 152 with hyperlipemia (HL) and the other 145 with normal blood lipid (normal control). We divided them into four age group... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目的: 了解男性血清锌α2糖蛋白(ZAG)的水平变化及其与生殖激素的关系。方法: 选取25~65岁体检男性297例,按血脂水平分为对照组145例和高脂组152例;按年龄分为25~35岁、36~45岁、46~55岁、56~65岁4个年龄组;依据血清ZAG水平的三分位数分为3组(Q1,Q2,Q3)。检测血脂、血糖、ZAG和生殖激素等,比较ZAG与代谢及生殖激素的关系。结果: ①随着年龄的增长,对照组和病例组男性血清ZAG逐渐下降,在36~45岁和56~65岁明显下降,有统计学差异(P<0.05)。同年龄组中比较,25~35岁和36~45岁中,高脂组的ZAG水平明显低于对照组,有统计学差异(P<0.05)。②FSH在ZAG低、中、高水平组... | zh-cn |
pair_29738166 | To investigate the mRNA and protein expressions of outer dense fiber 2 (ODF2) in the sperm of the asthenospermia patient and their differences from those in normal healthy men. According to the WHO criteria, we collected semen samples from 45 asthenozoospermia patients and 15 normal healthy volunteers. Using computer-a... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 【摘要】目的: 探讨弱精子症患者精子中外周致密纤维2(ODF2) mRNA及蛋白的表达水平,比较ODF2在健康男性与弱精子症患者中的表达差异。 方法: 根据WHO第5版,收集身体健康无疾病正常男性精液(n=15)和弱精子症患者精液(n=45)共60份,利用计算机辅助精液分析系统(CASA)进行精子统计,将弱精子症分为轻、中、重度3组,采用实时定量PCR和Western印迹对4组标本进行ODF2基因的表达量研究。 结果: 与正常组相比,轻度弱精子症组精子中ODF2基因表达无明显统计学差异(1.1120±0.5255 vs 0.6880±0.3720,P>0.05);中度弱精子症组ODF2基因表达降低,有显著的统计学差异(1.112 0... | zh-cn |
pair_29738167 | To compare the clinical effect of a novel disposable circumcision device Ring with that of conventional circumcision in the treatment of redundant prepuce and phimosis. Totally, 750 patients with redundant prepuce or phimosis underwent Ring circumcision (group A, n = 450) or conventional circumcision (group B, n = 300)... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目的: 比较新型包皮套扎器行包皮环切术与传统包皮环切术治疗包皮过长及包茎的临床效果及并发症。方法: 750例包皮环切术的患者分为两组,450例采用新型包皮套扎器包皮环切术(套扎器组),300例采用传统包皮环切术(传统组),分析和比较两组患者的手术时间、出血量、疼痛评分(视觉模拟评分法,VAS)、术后恢复时间和术后感染的发生率,及术后外观满意度等。结果: 所有手术均顺利完成,套扎器组的手术时间(3.78±0.42)min 、术中出血量(2.39±1.01)ml、术中疼痛评分(0.14±0.36)分,术后6 h疼痛评分为(0.32±0.78)分,拆环时疼痛评分(3.35±1.42)分,术后包皮完全愈合时间(7.61±1.60) d,愈合... | zh-cn |
pair_29738168 | To prove the clinical efficacy of umbilicus application of Huobi Powder for the treatment of erectile dysfunction (ED) with the traditional Chinese medicine (TCM) syndrome of kidney deficiency dampness by related clinical indexes. This randomized controlled double-blind clinical study included 72 ED patients with the T... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目的: 研究藿萆散敷脐对肾虚湿阻型勃起功能障碍(ED)的临床作用。方法: 采用随机对照、双盲的方法研究藿萆散敷脐对肾虚湿阻型ED患者的临床疗效。选取72例受试者并随机分为两组,治疗组运用藿萆散敷脐,对照组运用淀粉安慰剂敷脐,每天1次,每次12 h,连续28 d。观察两组中医证候积分、勃起功能国际问卷(IIEF-5)、勃起质量评分、视听刺激下阴茎径向硬度、阴茎勃起角度的变化。结果: 治疗组与对照组在治疗后中医证候有效率(69.44% vs 30.56%, P<0.01)、西医临床疗效(77.78% vs 36.11%,P<0.01)的比较上,两组具有显著差异。经治疗后,与对照组相比较,治疗组中医证候评分[(18.19±9.12)分 v... | zh-cn |
pair_29738169 | To clarify the roles of yam polysaccharide (YPS) in improving sperm viability and protecting sperm DNA integrity in vitro and provide a new approach to the treatment of oligoasthenozoospermia. We collected samples by masturbation from 36 normal fertile males aged 27-39 years. Each sample was divided into six groups: bl... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目的: 通过观察薯蓣多糖体外对精子膜及DNA完整性的影响。为少弱精子症的治疗提供新的途径。方法: 正常已生育成年男性,禁欲3~5 d手淫法取精液。分为6组,每组各取0.2 ml精液;对照组为精液原液,其他5组分别加入等量的生理盐水、维生素C溶液及不同浓度薯蓣多糖溶液(0.25、1.0、5.0 mg/ml)。通过伊红-Y染色试验、精子低渗肿胀实验(HOS)以及精子染色质扩散(SCD)实验,观察不同浓度薯蓣多糖体外对精子存活率、精子膜完整性以及精子核DNA的影响。结果: 6份精液样本孵育24 h及48 h后各组的精子存活率均有降低。维生素C组精子存活率分别为(28.5±3.1)%、(6.5±1.2)%;薯蓣多糖低、中、高剂量组的精子存活... | zh-cn |
pair_29738171 | At present, the study of erectile dysfunction depends heavily on animal models, but the differences in anatomy and physiology of currently used animals make it difficult to exceed the limitations on the experiment. In order to make the results of experiments more applicable and beneficial to the public, it is essential... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目前对于勃起功能障碍(ED)的研究极大地依赖于动物模型,但常用实验动物的在解剖、生理上的差异决定了其在进行勃起功能实验上的局限性,为了使实验成果更加合理有效并惠及人类,选用合适的动物模型对于男性性功能研究十分必要。此外,目前动物勃起功能的检测方法及评价指标尚未达成一致,因此归纳探讨现有方法对筛选动物模型有一定的指导意义。本文就不同类型的ED动物模型如何建立及检测评价作一综述。. | zh-cn |
pair_29738170 | To explore the protective effect of Tongjingling (TJL) against sperm DNA damage and oxidative stress in the rat model of experimental varicocele (EVC). We randomly divided 75 Wistar male rats into five groups of equal number: sham operation, EVC model, high-dose TJL, mid-dose TJL, and low-dose TJL. The EVC model was es... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目的: 探讨通精灵对实验性精索精索静脉曲张大鼠精子DNA完整性与睾丸组织氧化应激的影响。方法: 雄性Wistar大鼠75只随机分为假手术组、模型组、高剂量组、中剂量组、低剂量组,每组15只。参照文献制备大鼠精索静脉曲张模型,“夹尾激怒法”建立合并中医肝气郁结证模型。造模完成后4周开始给药,持续8周。观察大鼠的一般情况,精子染色质结构分析法(SCSA)检测附睾精子DFI。化学比色法测睾丸过氧化氢(H2O2)含量、过氧化氢酶(CAT)和超氧化物歧化酶(SOD)活性。结果: 与假手术组相比较,模型组大鼠附睾精子DFI[(8.36±2.49)%]显著升高(P<0.01),睾丸组织H2O2含量[(431.22±97.01) mmol/g pr... | zh-cn |
pair_29738172 | Seminal vesiculoscopy is a new technology in uro-andrology developed in recent 10 years, which is a set of clinical operational techniques for observing the ejaculatory duct, seminal vesicle, ampullar region of the vas deferens and their surrounding structure, determining the cause, location and degree of the disease, ... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 精道内镜技术是近10余年来出现的1项泌尿男科领域新技术。该技术是指利用口径纤细的内镜及其辅助器械对射精管、精囊、输精管壶腹部及其周围结构进行直接观察,确定发生疾病的原因、部位和程度,而且同时对精道远端区域各类疾病进行相应治疗,包括对精囊、射精管及其周围囊肿的冲洗、切开、烧灼、止血、扩张、引流、清除积血和结石、解除梗阻等一整套临床操作技术。因而,精道内镜技术既是1种对精道远端常见疾病的病因学诊断技术,又是1种针对病因的微创性手术治疗技术。该技术安全、有效、创伤小、恢复快、并发症少,对精道远端疾病诊治具有不可取代的优势。本文就精道内镜技术的发展历史,应用现状和发展趋势进行综述。. | zh-cn |
pair_29738173 | To investigate the application value of the frozen-thawed round spermatids of the mouse in in vitro fertilization (IVF). Haploid spermatids of the mouse obtained in vitro were divided into a frozen-thawed and a fresh group and oocytes were collected from 6-8 weeks old female mice. After diamidino-phenyl-indole (DAPI) s... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目的: 探讨冻融小鼠圆形精子细胞在体外受精中的应用价值。方法: 体外培养获得的小鼠单倍体精子细胞冻融复苏后,经 4',6-二眯基-2-苯基吲哚(DAPI)荧光染料标记后,行小鼠卵胞质内圆形精子细胞显微注射(ROSI) (冻融组,n=259),同时以体外培养获得的新鲜单倍体精子细胞行ROSI (新鲜组,n=238)作对照,比较两组精子细胞受精能力和后续胚胎发育能力。结果: 体外培养获得的小鼠单倍体精子细胞冻融后存活率为(75.9±2.3)%。冻融组与新鲜组受精率(51.9% vs 55.7%)、2细胞率(51.0% vs 62.2%)、4~8细胞率(41.8% vs 42.9%)及桑囊胚形成率(12.2% vs 21.4%)均无显著性... | zh-cn |
pair_29738174 | To induce hypospadias in male rat offspring by maternal exposure to di-n-butyl phthalate (DBP) during late pregnancy and further investigate its mechanisms. We randomly divided 20 pregnant rats into a DBP exposure and a control group, the former treated intragastrically with DBP while the latter with soybean oil at 750... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目的: 邻苯二甲酸二丁酯(DBP)孕晚期染毒诱导雄性SD大鼠子鼠发生尿道下裂畸形,并进一步探讨DBP致雄性子鼠发生尿道下裂的分子作用机制。方法: 孕鼠20只,怀孕14~18 d,随机分为对照组和DBP染毒组,每天分别予大豆油及DBP 750 mg/kg灌胃。出生后(PND)1 d,统计雄性子鼠中尿道下裂的发生率,观察尿道下裂雄性子鼠生殖结节的病理学改变。放射免疫法检测血清雄激素水平,实时荧光定量PCR和Western印迹检测生殖结节中雄激素受体(AR)、音猬因子(Shh)、骨形态发生蛋白4(Bmp4)和成纤维细胞成长因子8(Fgf8)的mRNA和蛋白表达水平。结果: 对照组中无尿道下裂发生,DBP染毒组中雄性子鼠尿道下裂发生率为43... | zh-cn |
pair_29738175 | To investigate the association of a very common mutation of c.144delC in the aurora kinase C (AURKC) gene with idiopathic teratozoospermia in Chinese infertile men in Sichuan. Using polymerase chain reaction (PCR) and next-generation sequencing, we analyzed the correlation between c.144delC polymorphism of the AURKC ge... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目的: 位于极光激酶C(AURKC)基因外显子区域的突变位点c.144delC在北非等地区的男性畸型精子症人群中十分常见,本试验主要探讨这个位点的基因多态性(SNP)与中国四川地区汉族男性畸形精子症的相关性。方法: 采用聚合酶链反应 (PCR)和二代测序的方法,分析98例畸形精子症患者和162例正常男性中AURKC基因的c.144delC多态性位点与男性不育的相关性。结果: 在98例典型男性畸型精子症和162例对照组中,均未发现c.144delC突变位点以及其他有义突变。结论: 综合分析本实验数据并结合国外研究得出,四川地区男性畸形精子症可能与AURKC基因的c.144delC突变没有相关性。因此,在中国临床上对畸形精子症的男性人群... | zh-cn |
pair_29738176 | To investigate the clinical application and outcomes of microdissection testicular sperm extraction (micro-TESE) in patients with nonmosaic Klinefelter syndrome (KS). A total of 143 nonmosaic KS patients underwent micro-TESE in the Center of Reproductive Medicine of Peking University Third Hospital between July 2012 an... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目的: 探讨睾丸显微切开取精术在非嵌合型Klinefelter综合征患者中的临床应用及其结局。方法: 总结从2012年7月至2016年8月在我院生殖医学中心行睾丸显微切开取精术的143例非嵌合型Klinefelter综合征患者的临床资料并随访其治疗结局。结果: 143例非嵌合型Klinefelter综合征患者中有64例成功获取精子,精子获得率为44.76%(64/143);其中顺利获得精子的64例患者中,有84.4%(54/64)患者仅行一侧睾丸显微切开取精即成功获取足够精子,15.6%(10/64)患者需行双侧睾丸显微切开取精获得精子。随访75例患者,成功获取精子的34例患者中,临床妊娠率为73.52%(25/34),已有14例患... | zh-cn |
pair_29738177 | To explore the effect of spermatic vein ligation under the microscope in the treatment of varicocele (VC). A total of 120 VC patients received in our department from September 2011 to February 2015 were randomly divided into an experimental and a control group of equal number, the former treated by microscopic spermati... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目的: 探讨显微镜下精索静脉结扎术对精索静脉曲张患者的治疗效果。方法: 选择2011年9月至2015年2月来我院进行治疗的精索静脉曲张患者120例,随机分为试验组和对照组,各60例。试验组行显微镜下精索静脉结扎术,对照组患者行传统开放高位结扎术。对比手术前后两组患者平静呼吸和作Valsalva 动作后精索静脉内径、精索静脉返流时间、睾丸包膜动脉血流数值和精液质量。结果: 组间比较显示,术后3个月试验组患者精索静脉返流时间显著短于对照组患者[(0.41±0.1) s vs (1.08±0.1) s,P<0.05],术后3个月试验组患者精索静脉最大内径在静息、Valsalva动作状态下均超过对照组[(1.63±0.07) mm vs (... | zh-cn |
pair_29738178 | To compare thulium laser vaporization of the prostate (TLVP) and transurethral resection of the prostate (TURP) in the treatment of benign prostate hyperplasia (BPH) analyze the risk factors for postoperative urethral stricture. From June 2015 to June 2016, 210 BPH patients in our hospital underwent TURP (n = 126) or T... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目的: 比较铥激光前列腺汽化切除术与经尿道前列腺电切术(TURP)术疗效及术后尿道狭窄相关因素分析。 方法: 收集2015年6月至2016年6月我院接受手术治疗的BPH患者210例,分为TURP组(n=126)和铥激光组(n=84),分别应用TURP和铥激光治疗,对比两种术式的治疗效果;术后随访半年,应用Logistic 回归分析术后半年发生尿道狭窄的危险因素。 结果: 铥激光组患者的手术时间(53.2±21.6) min与TURP组患者(78.6±27.5) min相比明显缩短,术后膀胱冲洗时间(26.1±3.7) h与TURP组患者(31.5±2.9) h相比明显缩短,留置尿管时间(3.7±1.5)d与TURP组患者(5.3±1... | zh-cn |
pair_29738179 | To investigate the therapeutic efficacy and safety of Gujing Maisiha Tablets combined with natural vitamin E in the treatment of idiopathic asthenospermia. This study included 135 outpatients with idiopathic asthenospermia received in our hospital from February 2015 to January 2016. We randomly divided them into a trea... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目的: 研究固精麦斯哈片联合天然维生素E治疗特发性弱精子症的临床效果。方法: 纳入2015年1月至2016年1月门诊135例弱精子症患者。随机分为两组,治疗组患者72例,年龄22~44岁, 平均年龄33.6岁;对照组患者63例,年龄21~43岁, 平均年龄32.8岁。治疗组服用固精麦斯哈片(每次6片,每日2次)和天然维生素E(每次100 mg,每日2次),对照组服用天然维生素E(每次100 mg,每日2次),连续服用30 d为1个疗程,总共3个疗程。治疗前及治疗90 d后通过对精子总活力(PR+NP)、精子前向运动率(PR)和配偶妊娠情况比较,评估其临床有效性。 结果: 治疗组和对照组在治疗前,精液中PR+NP、PR分别为(25.2... | zh-cn |
pair_29738180 | To investigate the clinical effect of a novel disposable ring versus that of the suture device in circumcision for redundant prepuce and phimosis. We randomly assigned 470 male patients with redundant prepuce or phimosis to receive circumcision with a novel disposable ring (the DR group, n = 235) or the suture device (... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目的: 比较新型包皮套扎器行包皮环切术与缝合器包皮环切术治疗包皮过长及包茎的临床效果。方法: 470例包皮环切术的患者随机分为两组,一次性使用包皮套扎器包皮环切术(套扎器组)和缝合器包皮环切术(缝合器组)各235例。分析和比较两组患者的手术时间、术中出血量、疼痛评分(视觉模拟评分法,VAS)、术后愈合时间、阴茎头充血水肿、排尿困难或者费力、术后明显出血及血肿、包皮裂开、延迟脱钉及愈合后外观满意度等。结果: 所有手术均顺利完成,套扎器组的手术时间(3.83±0.42)min 、术中出血量(2.41±1.01)ml、术中疼痛评分(0.20±0.47)分,术后6 h疼痛评分(0.48±0.94)分,术后包皮愈合时间(7.79±1.65) ... | zh-cn |
pair_29738181 | To analyze the clinical outcomes of repeated superovulation induction in patients with adenomyosis or moderate to severe pelvic endometriosis after failure in previous IVF-ET cycles with the ultra-long protocol. We retrospectively analyzed the clinical data about 37 patients with adenomyosis or moderate to severe pelvi... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目的: 了解中、重度盆腔子宫内膜异位症或子宫腺肌症患者,经超长方案体外受精胚胎移植(IVF-ET)失败后,重复采用超促排卵治疗的IVF-ET结果。方法: 回顾 2009~2013年我中心因子宫腺肌症或中、重度盆腔子宫内膜异位症,采用3.75 mg促性腺激素释放激素拮抗剂(GnRH-a)2~6针超长治疗方案进行IVF-ET的患者,选择移植后14 d血绒毛膜促性腺激素(hCG)阴性,月经来潮的3~7 d,血促卵泡生成素(FSH)、促黄体生成素(LH)、雌二醇(E2)水平,窦卵泡直径、子宫内膜厚度,仍在降调满意水平(抽血检查FSH、LH<10 mIU/ml,E2<30 pg/ml;B超监测窦卵泡直径<10 mm)的37例患者,随即给予促性... | zh-cn |
pair_29738182 | To report a rare case of epididymal liposarcoma with multiple metastases to the retroperitoneal space and peritoneal cavity for the purpose of improving the diagnosis and treatment of the disease. We retrospectively analyzed the clinical data about a case of epididymal liposarcoma with multiple metastases to the retrop... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目的: 报告1例罕见的附睾脂肪肉瘤伴腹膜后及腹腔内多次转移病例,提高对本病的诊治水平。方法: 回顾分析1例附睾脂肪肉瘤伴腹膜后及腹腔内多次转移患者的临床资料,结合国内外相关文献,探讨附睾脂肪肉瘤的临床表现、诊断及治疗。结果: 经腹股沟切口行根治性高位睾丸切除术完整切除肿瘤,10年后出现腹膜后复发转移,肿块上至肾脏上极,下达盆腔,大小15.6 cm×9.4 cm×25.5 cm,包裹左肾及输尿管上段,行左肾及输尿管全长、腹膜后肿瘤切除手术,4年后再次出现腹膜后、腹腔内多发复发转移灶,再次行手术切除,随访1年,死于肺功能衰竭。结论: 附睾脂肪肉瘤极为罕见,仔细的临床体检和影像学检查可协助诊断,但最终需病理确诊,应早期行根治性手术切除。放... | zh-cn |
pair_29738183 | To study the therapeutic effect of Lamiophlomis Rotata Capsule (LRC) in the treatment of type ⅢB prostatitis. We randomly divided 225 patients with type ⅢB prostatitis into an experimental group (n =125) and a control group (n =120), the former treated orally with LRC at 3 capsules tid while the latter with tamsulosin ... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目的: 探讨独一味胶囊治疗ⅢB型前列腺炎的疗效。 方法: 选择ⅢB型前列腺炎患者225例,随机分为两组:治疗组125例,口服独一味胶囊,一次3粒,一日3次,疗程4周;对照组100例,口服盐酸坦索罗辛缓释胶囊,0.2 mg/次,一日1次,疗程4周。以NIH-CPSI评分为疗效评价指标,比较治疗前后、停药4周后两组的疗效。 结果: 治疗组完成治疗 120 例,结果示:①治疗组治疗后疼痛症状评分、生活质量评分和总评分均较治疗前显著下降(5.30±1.23 vs 14.68±1.51; 6.46±0.93 vs 8.52±1.05; 17.50±2.77 vs 27.99±2.98)(P<0.05);而排尿症状评分治疗前后无明显改变(7.4... | zh-cn |
pair_29738184 | To investigate the correlation between the syndrome types of traditional Chinese medicine (TCM) and clinical symptoms of benign prostatic hyperplasia (BPH) with chronic prostatitis (BPH-CP). We selected 150 cases of BPH-CP in this study and divided them into 7 TCM syndrome types. Using univariate and multivariate logis... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目的: 分析良性前列腺增生(BPH)伴慢性前列腺炎(CP)中医证型与临床症状之间的相关性。方法: 选取150例BPH伴CP患者进行研究,于治疗前将其分为7种中医证型,对各证型患者的年龄、病程、前列腺质量、残余尿量、PSA水平、尿流率和IPSS评分等临床症状之间的相关性进行单因素分析和多因素Logistics回归性分析。结果: 经统计,肾阴不足证与前列腺质量呈正相关,与尿流量和IPSS呈负相关;肾阳亏虚证与年龄和前列腺质量呈正相关,与IPSS呈负相关;湿热下注证与PSA呈正相关,与病程、前列腺质量和尿流率呈负相关;脾气虚弱证与前列腺质量呈正相关,与病程呈负相关;肝郁气滞证与病程呈正相关,与年龄、前列腺质量和残余尿量呈负相关;气滞血瘀证... | zh-cn |
pair_29738185 | To observe the effect of Huangjing Zanyu Capsule (HZC) on sperm mitochondrial membrane potential (MMP) in asthenozoospermia patients. We assigned 70 asthenozoospermia patients to a treatment group (n = 39) and a control group (n = 31), the former treated with oral HZC at the dose of 4 capsules tid for 3 months while th... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目的: 观察黄精赞育胶囊对弱精子症患者精子线粒体膜电位的影响及临床疗效。 方法: 弱精子症患者70例分药物治疗组(n=39)和空白对照组(n=31)做队列观察研究。药物治疗组予黄精赞育胶囊口服3个月,1次4粒,每日3次。服用时可备孕,期间若配偶怀孕则停止用药。空白对照组不予药物干预。观察初次就诊和3个月后精液参数变化,及JC-1染色后流式细胞仪检测精子线粒体膜电位(MMP)值的变化。 结果: 两组各失随访1例。药物治疗组总有效率为71.05%,服药过程中3例患者女方自然妊娠。药物治疗组35例患者完成观察期结束后检查,MMP%、精子总活力、前向运动精子百分率(PR%)、精子形态均有改善,其变化值较空白对照组30例患者的测定值有显著差异... | zh-cn |
pair_29738186 | To assess the association of the FSHR Thr307Ala-Asn680Ser gene polymorphism with male infertility. We searched Pubmed, EMBASE, Web of Science, CNKI, and WANFANG databases for literature on the correlation of the FSHR Thr307Ala-Asn680Ser gene polymorphism with male infertility published from 2005 to the present time. Ac... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 目的: 用Meta分析的方法综合评价FSHR Thr307Ala-Asn680Ser等位基因多态性与男性不育的关联性。方法: 检索PubMed、EMBASE、Web of Science、中国知网和万方等中英文数据库2005至今文献,依据选择标准收集相关病例对照研究数据,应用Stata 11.0软件对符合条件的研究结果进行Meta分析。 结果: 符合纳入标准的共12篇文献,包含病例组2 893例和对照组3 312例。经综合分析:在3种比较模型(纯合比较模型、杂合比较模型和显性比较模型)中,Thr307Ala(rs6165)位点多态性是男性不育的危险因素,OR值分别为1.26(95% CI:1.03~1.54), P = 0.023;... | zh-cn |
pair_29738187 | n recent years, photoselective vaporization of the prostate (PVP) has gained a wide clinical application in the treatment of benign prostatic hyperplasia (BPH) for its satisfactory effect, high safety, and low incidence of complications. With the improvement of living conditions, BPH patients are paying more attention ... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 近年来绿激光前列腺汽化术(PVP)被广泛应用于临床,其良好的疗效、较高的安全性及较低的并发症已得以证实。随着生活条件的改善,患者对BPH的治疗已不再满足于下尿路症状的改善,对男性性功能尤其是勃起功能和射精的影响也愈发重视。但相关的研究并不多,且各研究之间存在一定的争议。大部分观点认为,绿激光功率的增加不影响勃起功能和不增加逆行射精(REj)的风险,在预防REj方面PVP比经尿道前列腺电切术(TURP)更具优势。本文就近年发表的有关绿激光前列腺汽化术对性功能影响的文献作一综述。. | zh-cn |
pair_29738188 | Prostate cancer (PCa) is the primary malignancy threatening men's health in the United States and its incidence is increasing in China year by year. Many PCa cases are found in the advanced stage or in the old age, treated with unstandardized options, with negligence of comprehensive assessment of the patient's physica... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 在美国,前列腺癌(PCa)已成为第一位危害男性健康的肿瘤,在我国的发病率也逐年升高,但监测与治疗还是相对落后,很多患者在就诊时已是晚期或者年龄较大;治疗方案的选择尚无统一规范,患者状态的综合评估往往不够具体或者被忽略,这样进行的治疗可能会给患者带来过多的身体、心理和经济负担,甚至造成死亡;也有过于保守的,失去了最佳的治疗时机导致患者病情加重等。所以对于老年PCa患者治疗前的身体状态综合评估应该引起重视,选择最佳的治疗方案为患者带来最大益处。. | zh-cn |
pair_29738189 | Bipolar androgen therapy (BAT), as a new therapeutic strategy for castration-resistant prostate cancer (CRPC), can significantly reduce the level of prostate-specific antigen (PSA) for prostate cancer patients and has exhibited an excellent safety profile with no serious adverse events. Based on the clinical trials rec... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 双极雄激素治疗(BAT)是去势抵抗性前列腺癌(CRPC)的新型治疗方法,可显著降低患者血清前列腺特异性抗原(PSA)水平,且具有良好的安全性。笔者结合近期国内外临床试验,对BAT提出的背景、机制、发展进程及前景作一综述。. | zh-cn |
pair_29740997 | We conducted an in situ incubation experiment to determine soil mineral N (NH<sub>4</sub><sup>+</sup>-N and NO<sub>3</sub><sup>-</sup>-N) concentrations and soil net N mineralization rates (net ammonification rate and net nitrification rate) using close-top PVC tubes in three adjacent forests (natural forest, Castanops... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 以亚热带地区天然林、格氏栲人工林和杉木人工林为对象,采取PVC管原位培养连续取样法,对不同林分土壤净氨化速率、净硝化速率及净氮矿化速率进行为期一年(2014年9月-2015年8月)的研究,分析林分类型和季节动态对土壤矿质氮库和净氮矿化速率的影响.结果表明: 硝态氮是该地区土壤矿质氮库的主要存在形式,天然林和杉木人工林土壤硝态氮含量分别占总土壤矿质氮库的55.1%~87.5%和56.1%~79.1%,林分间土壤铵态氮含量差异不显著,硝态氮含量差异显著,其中格氏栲人工林土壤硝态氮含量显著低于天然林和杉木人工林.土壤硝态氮库和矿质氮库在不同月份间差异显著,在植物非生长季节(10月至次年2月)较大,在植物生长季节(3-9月)较小.各林分全年... | zh-cn |
pair_29740999 | A total of 13 phenotypic traits from 11 natural populations of Cupressus chengiana were investigated by using nested analysis, variation coefficient, phenotypic traits differentiation coefficient, and un-weighted pair-group method by arithmetic averages (UPGMA) cluster analysis. Phenotypic variations among and within p... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 运用巢式方差分析、变异系数、表型分化系数和聚类分析等多种分析方法,研究了11个岷江柏种群的13个种实表型性状在种群内和种群间的变异及其与环境因子间的关系,并对其进行了类群划分.结果表明: 岷江柏种实表型性状在种群间和种群内均存在显著差异,种群内的变异(49.7%)大于种群间的变异(28.6%),种间平均分化系数为43.4%,分化程度相对较大.球果质量的平均变异系数最高(37.2%),其次是单个球果种子质量,球果长的平均变异系数最小(8.0%),是最稳定的种实性状.康定县的表型多样性最丰富,武都县的最小.在岷江柏的研究区内,最热月的平均气温和生长季的水分条件是其种实表型的主要限制因子.依据13个种实表型性状将11个岷江柏天然种群分为2... | zh-cn |
pair_29741002 | We analyzed the rules of Metasequoia glyptostroboides along with latitude, including leaf length, leaf width, leaf perimeter, leaf area, ratio of leaf length to width, specific leaf area (SLA), and leaf dry mass based on eight stands growing at different latitudes in the coastal area of eastern China, as well as their ... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 在中国东部沿海地区沿纬度梯度选取8个水杉林,研究水杉的叶片长度、叶片宽度、叶片周长、叶片面积、叶片长宽比、比叶面积、叶片干质量等叶片性状指标的纬度变化规律,分析叶片性状与气象、土壤因子的关系.结果表明: 随着纬度的升高,水杉叶片长、宽、周长逐渐增大,叶面积和比叶面积先增加后降低.在纬度梯度上,水杉叶片性状的变化主要受年均温和年均降水量的影响.随着土壤氮含量的增加,比叶面积呈先下降后上升的趋势,叶干质量则呈显著下降的趋势;随着土壤磷含量的增加,比叶面积逐渐增加,而叶干质量则显著下降. | zh-cn |
pair_29741003 | Ten permanent plots of Larix olgensis plantation were established in 1972 and 1974 at Jiangshanjiao and Mengjiagang forest farms in Heilongjiang Province, respectively. The plots including 8 thinning plots and 2 control plots were measured annually. The effects of thinning on the probability of plot mortality and indiv... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 1972和1974年分别在黑龙江省江山娇林场及孟家岗林场设置10块长白落叶松人工林固定样地(8块抚育间伐样地、2块对照样地),采用连年复测数据,分析抚育间伐对人工长白落叶松样地枯死与单木枯死的影响.基于二分类变量Logistic回归,建立了样地枯死及样地内单木枯死概率的两阶段模型(Ⅰ:抚育间伐后样地水平枯死概率模型;Ⅱ:枯死样地中单木水平枯死概率模型),采用广义估计方程(GEE)方法对模型参数进行估计.根据敏感度和特异度曲线相交点确定枯死概率最优临界点.结果表明: 样地数据按照抚育间伐次数分为4组分别建模(模型1~模型4).在模型1中,地位指数、林分年龄的自然对数、抚育间伐年龄及强度为显著自变量;模型2~模型4采用主成分分析法建模,... | zh-cn |
pair_29741008 | In this study, we collected data of meteorology, soil property, agricultural management and corn yield from five representative sites in Jilin Province, China, and integrated these data into a crop growth model of CERES-maize to simulate the potential productivity of five corn varieties. Our objectives were to simulate... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 本研究以我国吉林省为例,采用5个典型研究站点1981—2010年的气象观测数据、土壤数据、田间管理资料及玉米产量实测值,应用作物生长模型CERES-Maize对5个不同品种玉米生产潜力进行了模拟,在分析气候因素对生产力影响的基础上,模拟、校准与验证遗传参数,实现应对气候变化、提高作物生产力的调控技术模拟,以期指导作物生产.结果表明: 玉米播种-开花、开花-成熟两个生长阶段天数模拟值和单产的模拟值与实际值极为吻合,归一化均方根误差分别为2.96%、3.40%、9.37%,偏离指数范围为-10.6%~15.2%,玉米光温生产潜力模拟值年均为7799.60~12902.83 kg·hm<sup>-2</sup>,每10年下降128.6~8... | zh-cn |
pair_29741009 | A series of typical abandoned croplands in the regions of Ruanliang and Yingliang in the Ordos Plateau, China, were selected, and dynamics of the surface litter, biological soil crust and soil bulk density, soil texture, and soil moisture in different soil layers were investigated. The results showed that in the abando... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 在鄂尔多斯高原软梁、硬梁弃耕农田上选取一系列不同时限的弃耕农田,研究弃耕演替过程中地表凋落物、生物结皮,以及不同土层土壤容重、机械组成、含水量的动态变化.结果表明: 软梁弃耕农田表层(0~10 cm)物理环境随弃耕年限增加明显改善,土壤黏粒含量、地表凋落物随弃耕年限增加明显增加,土壤容重明显降低,土壤含水率略微升高;中层(10~30 cm)土壤物理环境随弃耕年限增加稍显恶化,土壤黏粒含量升高,土壤含水量略微降低;深层(30~50 cm)土壤物理性质变异较大.硬梁弃耕农田土壤表面凋落物盖度、生物结皮盖度、生物结皮厚度随弃耕年限增加而增加,表层(0~10 cm)土壤容重、黏粒含量、含水量随弃耕年限变化总体变化不显著,深层(10~40 c... | zh-cn |
pair_29741011 | This study explored the differences of soil water content at 0-20 m soil depth at three locations, including economical plantation in Mizhi, reforestation area in Shenmu, and wind break and sand fixation forest district of Yuyang, and for clarifying the impacts of different land use types on deep soil water distributio... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | None | zh-cn |
pair_29741013 | Field experiments were conducted in 2014 and 2015 at the 'Inner Mongolia cotton comprehensive test station' (39°27' N, 105°39' E) in Alxa Left Banner of Alxa League in Inner Mongolia. By using cotton cultivar CCRI-50 as material and the '6 cotton rows with 3 dripping pipes under a plastic film mulching' plantation patt... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 于2014—2015年在内蒙古自治区阿拉善盟阿拉善左旗内蒙古棉花综合实验站设置大田试验,以‘中棉所50’为材料,采用“一膜三管六行”机采棉配套栽培技术种植,研究播期(4月20日、4月30日和5月10日)对棉花产量、品质及养分吸收的影响.结果表明: 随着播期推迟,棉花生育时期推迟,生育期缩短,铃期日均温降低,收获密度增加;播期显著影响棉株干物质累积、养分吸收与分配,以及产量和品质形成,4月30日播种条件下,棉株干物质和养分在经济器官中的分配比例、养分总积累量及养分的皮棉生产效率较高,籽棉和皮棉产量最高,达6505.9和2660.9 kg·hm<sup>-2</sup>,且纤维品质较优;4月20日播期下,收获密度、生物量和养分累积量最低... | zh-cn |
pair_29741014 | Conservation tillage and the weed diversity are two hot issues in the modern ecological agriculture. Although it is known that the diversity of weed would increase slightly in the farmland under conservation tillage, the interaction effects between the tillage and the nutrient management on the weed community are not c... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 保护性耕作和杂草多样性是现代生态农业关注的热点问题.尽管保护性耕作下农田杂草多样性有所提高,但耕作方式与养分管理方式对农田杂草群落多样性的交互影响尚未探明.本研究以山东省济南市一块连续3年施行不同耕作方式(免耕、深松、旋耕、深耕)和不同养分管理措施(农户常规:年施氮肥480 kg·hm<sup>-2</sup>,高产高效:年施氮肥360 kg·hm<sup>-2</sup>,优化管理:年施氮肥300 kg·hm<sup>-2</sup>)的冬小麦-夏玉米轮作农田为研究样地,调查并比较了不同管理模式下农田春季杂草群落特征.结果表明: 该冬小麦-夏玉米农田春季杂草群落共发现杂草15种,其中优势物种为马唐和稗;与深耕和旋耕相比,免耕和深松... | zh-cn |
pair_29741016 | Photosynthesis characteristics of winter wheat under different tillage practices during fil-ling stage are vital for dry matter accumulation, transfer, and yield development. A field experiment, including no-till with residue removal (NT), no-till with residue retention (NTS), rotary tillage with residue removal (RT), ... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 研究耕作方式对冬小麦灌浆期光合性能日变化的影响,对灌浆期干物质积累、转运以及产量形成具有重要的理论意义.本研究以中国农业大学吴桥实验站2008年设置的长期耕作定位试验为基础,分析了免耕秸秆不还田(NT)、免耕秸秆还田(NTS)、旋耕秸秆不还田(RT)、旋耕秸秆还田(RTS)、深松秸秆不还田(DT)、深松秸秆还田(DTS)、翻耕秸秆不还田(CT)和翻耕秸秆还田(CTS)耕作处理对冬小麦灌浆期旗叶光合特性日变化、光响应曲线和产量的影响.结果表明: 不同耕作方式对冬小麦灌浆期旗叶净光合速率日变化和气孔导度日变化的影响均呈双峰曲线变化趋势,秸秆还田下不同耕作方式的冬小麦旗叶净光合速率高于相应的秸秆不还田处理;各耕作方式对冬小麦旗叶胞间CO<... | zh-cn |
pair_29741019 | The main wheat production area in Henan Province was classified into five regions based on observed wheat production data, historical meteorological data and soil data from thirty sites du-ring 1981 to 2014. The changes in the risk of yield loss of winter wheat under water stress condition in each region were calculate... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 以河南省30个站点1981—2014年冬小麦观测资料、历史气象资料和土壤资料为依据,将河南冬小麦主产区划分为5个区域,基于WOFOST作物生长模拟模型,分析了水分胁迫条件下河南省冬小麦减产风险值的变化规律.结果表明: 1981—2014年,各区域冬小麦减产率均呈上升趋势,平均每10 a增加2.8%~5.0%.冬小麦减产率由北向南呈降低趋势,减产率超过20%的事件在豫南地区约10年一遇,豫北的新乡、封丘和濮阳一带约2年一遇;减产率超过50%的事件,在新乡、郑州地区约3年一遇,豫南少遇.豫北及豫中偏北的大部分地区为冬小麦减产风险高值区,豫西卢氏、豫西南南阳、豫南信阳和驻马店南部地区为冬小麦减产风险低值区,其他地区为风险中值区. | zh-cn |
pair_29741022 | Assara inouei Yanmanaka is an important pest of pomegranate fruits in Yunnan Province. To examine the effects of different pomegranate varieties on the development and reproduction of A. inouei, the biological characteristics, such as the developmental duration, the survival rate and reproduction of this pest feeding o... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 井上蛀果斑螟是云南石榴上的一种主要蛀果害虫.为明确石榴不同品种对该虫生长发育和繁殖的影响,在温度(25±1) ℃、光周期15 L∶9 D、相对湿度(70±10)%条件下,系统观察了井上蛀果斑螟在甜绿籽、厚皮甜沙籽、甜光颜、酸绿籽和酸沙籽5个品种上的发育历期、存活率和产卵量等生物学特性,并组建了其实验种群生命表.结果表明: 井上蛀果斑螟在5个石榴品种上的卵期、幼虫期、蛹期、雄成虫寿命、全世代历期及卵孵化率均无显著差异;预蛹期、雌成虫寿命、幼虫存活率、化蛹率、羽化率、总成活率、单雌产卵量及雌雄蛹质量存在显著差异,除幼虫存活率外,均以酸绿籽种群较高,厚皮甜沙籽种群次之,二者间差异不显著.生命表参数表明,净增殖率、内禀增长率和周限增长率均为... | zh-cn |
pair_29741023 | In order to clarify the feasibility of the banker plant system 'Leesia sayanuka-Nlilaparvata muiri-Tytthus chinensis' to control rice planthooper, the effects of the combination of rice, L. sa-yanuka, N. lugen and N. muiri on the adult morphology, population growth, oviposition and feeding selectivity of T. chinensis w... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 为明确用于防治稻飞虱的“秕谷草-伪褐飞虱-中华淡翅盲蝽”载体植物系统的可行性,本文开展了靶标作物水稻、载体植物秕谷草和靶标害虫褐飞虱、替代猎物伪褐飞虱组合对中华淡翅盲蝽成虫形态、种群增长参数、产卵选择性和取食选择性的影响研究.结果表明: 中华淡翅盲蝽水稻种群(取食褐飞虱卵)的雌雄成虫个体均显著大于秕谷草种群(取食伪褐飞虱卵).取食褐飞虱卵的中华淡翅盲蝽种群增长参数单雌产卵量、净增长率、内禀增长率、周限增长率明显高于取食伪褐飞虱卵的种群,但取食伪褐飞虱卵也有较高的种群增长能力,足以扩繁种群.对于靶标作物水稻和载体植物秕谷草,无论是水稻种群还是秕谷草种群均偏好在水稻上产卵.同时,2个种群的雌虫、雄虫和若虫对褐飞虱卵和伪褐飞虱卵捕食量没有... | zh-cn |
pair_29741024 | Cucurbitaceae wilt of different hosts could be caused by Fusarium oxysporum. To clear the genetic diversity and phylogenetic relationship of F. oxysporum isolates from different Cucurbitaceae hosts and regions, genomic DNA of ninety-five strains of F. oxysporum isolated from different hosts and different regions were a... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 尖孢镰刀菌可造成不同瓜类的枯萎病.为明确不同寄主、不同地区的瓜类枯萎病菌菌株间的遗传多样性及亲缘关系,采用相关序列扩增多态性(SRAP)分子标记技术,对来源于不同地区、不同寄主的95株尖孢镰刀菌的基因组DNA进行多态性扩增.以筛选出的19对引物共扩增出238条带,多态性比率为100%,平均每对引物扩增出12.5个位点和12.5个多态性位点;尖孢镰刀菌苦瓜专化型共扩增出166条带,其中145条为多态性条带,多态性比率为87.4%,平均每对引物扩增出8.7个位点和7.7个多态性位点,说明尖孢镰刀菌的遗传变异较为广泛.瓜类枯萎病菌株间的遗传相似系数范围为0.68~0.99,样品间的平均Nei遗传多样性指数和Shannon指数分别为0.23... | zh-cn |
pair_29741027 | With the expansion of urban area, many cities are facing urban water environment issues, i.e., water resources shortage, lack of groundwater reserves, water pollution, urban waterlogging. For resolving these urban issues, 'sponge city' was proposed in 2015 in China. Liaodong Bay area of Panjin City in Liaoning Province... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 随着我国城市面积不断扩张,我国许多城市面临着水资源短缺、地下水储量不足、水质污染和内涝的问题.针对这些城市水环境问题,我国2015年提出“海绵城市”建设.本文以辽宁省盘锦市辽东湾新区为例,依据《海绵城市建设技术指南-低影响开发雨水系统构建(试行)》,通过对典型区进行下垫面及各地块用地类型分析,结合研究区地形、水文、降雨强度等因素,选取低影响开发(LID)措施对研究区海绵城市规划进行设计.结果表明: 研究区达到整体目标控制率(年径流总量控制率大于75%)时,下沉式绿地率为1%~31%,下沉式绿地总面积达13.73 km<sup>2</sup>;透水铺装率为1%~13%,透水铺装总面积达2.29 km<sup>2</sup>.本研究能够... | zh-cn |
pair_29741030 | Limnological studies have long focused on the nine largest plateau lakes and ecological assessment of lake eutrophication in Yunnan. However, comprehensive surveys of small and me-dium-sized lakes and their response to multiple stressors are largely absent. Here, we combined multi-proxy sediment analyses and documentar... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 有关云南湖泊的研究长期集中于高原九大湖泊和水体富营养化评价,缺少对中小型水体及多重环境压力胁迫的综合研究.本文以大理西湖为例,结合沉积物记录与现代监测资料,甄别了气候变化和人类活动干扰下硅藻群落结构的长期响应模式及其驱动强度.结果表明: 20世纪50年代以前,大理西湖总体处于自然演化阶段;1950年代开始,围湖造田和流域改造的增强导致了水体营养水平增加、水动力条件改变,硅藻优势种由扁圆卵型藻替代为脆杆藻属;而1997年以来营养水平的快速增加和湖泊水动力的改变,促进了浮游藻类大量生长、底栖硅藻持续减少,同时水生植物快速退化、生态系统稳定性明显降低.因此,在长期流域开发的背景下,对云南中小型高山湖泊的有效保护需要评价流域开发类型、强度及... | zh-cn |
pair_29741032 | Ecological network can be used to describe and assess the relationship between spatial organization of landscapes and species survival under the condition of the habitat fragmentation. Taking Qingdao City as the research area, woodland and wetland ecological networks in 2005 were simulated based on least cost path meth... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 生态网络可用于描述、评价生境破碎条件下景观空间组织方式与物种存续的关系.本文以青岛市为研究区域,基于最小成本路径方法模拟得到2005年林地、湿地生态网络,并基于廊道累计成本值对得到的生态网络进行分级.利用介数指数、相关长度-逐块筛选指数对生态网络中斑块与廊道等结构要素进行重要性区分,形成生态网络结构体系.并在评价2005—2013年新增建设用地对生态网络影响的基础上,提出应对建设用地变化的生态安全格局.结果表明: 在生态网络框架基础上,图形理论的相关评价方法能够量化评价识别生态用地的具体属性(如生态网络斑块的面积)和生态用地之间的功能联系;2005—2013年间,青岛市新增建设用地对湿地侵占面积较大,且没有考虑具体林地、湿地在整个地... | zh-cn |
pair_29741035 | Studies on the material throughput in the socioeconomic system from the viewpoint of metabolism is not only important for understanding the relationship between human activities and natural environment, but also helpful for utilizing resources in a reasonable and sustainable manner. Based on the review of the research ... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 从物质代谢的视角研究物质在社会经济系统中的流通过程,不仅能深入理解人类活动与自然环境之间的关系,更有助于实现资源的合理利用和可持续发展.本文在对国内外有关物质代谢的研究方法、在不同空间尺度的应用、资源和环境效应的研究进展进行综述的基础上,较全面的对上述研究中已取得的成果以及尚待完善之处进行总结.物质代谢研究应从过去的单一理论和方法向多学科和方法交叉融合的方向发展,以解决复杂的代谢问题.随着城市在全球生态环境中的重要性日益凸显,应加强传统的代谢研究与地理空间分析的结合,并将人类福祉等评价指标纳入物质代谢的研究范畴,进而从物质代谢的视角提出节约资源、降低环境负荷、提高环境-经济-社会协调发展的可持续管理对策. | zh-cn |
pair_29741038 | We determined the water use efficiency and nitrogen and phosphorus concentrations of plants at different altitudes (600, 900, 1300, 1500, 1800, 2000, 2100 m) in Wuyi Mountains to understand the relationship of water use efficiency with foliar nutrients. The results showed that plant water use efficiency increased with ... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 以武夷山不同海拔(600、900、1300、1500、1800、2000和2100 m)的乔木、灌木和草本3种生活型植物为研究对象,观测其水分利用效率和叶片氮、磷养分浓度随海拔的变化趋势,旨在探索海拔梯度间水分、养分变化与植物水分利用效率变化的关系.结果表明: 植物水分利用效率随海拔的增加呈显著上升趋势,乔木叶片δ<sup>18</sup>O随海拔变化不显著.总体上看,叶片氮浓度未观测到规律性的变化,高海拔地区的叶片磷浓度显著高于低海拔地区.水分利用效率与叶片磷浓度呈显著正相关,而与叶片氮浓度相关性不显著.不同海拔植物水分利用效率变化主要由光合速率的变化引起,水分状况对植物水分利用效率的影响不显著.海拔梯度间植物叶片磷浓度的差异对光... | zh-cn |
pair_29741050 | With the development of the binary structure of karst landforms, surface water is largely drained with rapid loss of nutrients. However, the pathway and mechanism of nutrient loss remain elusive. From a three-dimensional (vegetation-soil-epikarst system) perspective of a critical zone in karst area, this study conducte... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 喀斯特二元结构发育,地表水大量漏失,养分表现出快速流失的特点,然而养分流失的途径和机制尚不清楚.本研究从喀斯特关键带三维空间的视角,通过监测喀斯特灌丛坡地雨季典型降雨产流和氮素流失特征,基于氢氧稳定同位素技术对主要水文路径“新旧水”比例进行划分,并探讨氮素流失的主要途径和机制.结果表明:深层渗漏和壤中流是喀斯特灌丛坡地主要水文路径,两者分别占降雨量的71%和9%,地表径流仅占2%;深层渗漏、壤中流均以“旧水”为主,“旧水”比例分别为85%、61%;硝态氮浓度在深层渗漏中最高(1.97 mg·L<sup>-1</sup>),铵态氮浓度在壤中流中最高(1.18 mg·L<sup>-1</sup>),深层渗漏对氮素流失的贡献率达89.4%... | zh-cn |
pair_29741051 | Understanding the soil-profile temporal and spatial distribution of rainwater in arid and semiarid regions provides a scientific basis for the restoration and maintenance of degraded desert ecosystems in the West Ordos Desert of Inner Mongolia, China. In this study, the deuterium isotope (δD) value of rainwater, soil w... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 探讨我国干旱半干旱地区大气降水在土壤剖面中的时空分布特征将为西鄂尔多斯荒漠退化生态系统恢复和维持提供科学依据.本研究利用氘同位素技术研究了内蒙古西鄂尔多斯荒漠的大气降水、土壤水、地下水中的氘同位素值(δD),运用二元线性混合模型计算降水对各层土壤水的贡献率,并结合土壤含水量分析了不同降水条件下土壤剖面各层土壤水δD的时空分布特征.结果表明: 雨后9 d内,小雨(0~10 mm)影响0~10 cm土壤含水量和土壤水δD值,对表层土壤(0~10 cm)的贡献率在30.3%~87.9%;中雨(10~20 mm)影响0~40 cm土壤含水量和土壤水δD值,对0~40 cm土壤水的贡献率为28.2%~80.8%;大雨(20~30 mm)和特大... | zh-cn |
pair_29741052 | The southern margin desert of Junggar Basin in the central arid region of Asia was selec-ted as the study area. To gain insight into the distribution characteristic of stable carbon isotope and the relationship between the change of soil carbon and the distance to oasis of soil organic carbon (SOC) and soil inorganic c... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 以亚洲中部干旱区准噶尔盆地南缘荒漠区为研究区,根据荒漠距离绿洲的距离,分别在荒漠边缘、中部和腹地设置3条样带,并采集2 m深的土壤剖面样品,研究土壤有机碳(SOC)、无机碳(SIC)含量及其稳定碳同位素的分布,探讨土壤碳变化与距绿洲距离的关系.结果表明: SOC含量随剖面土层深度增加而减少.受距绿洲距离的影响,SOC含量表现为荒漠边缘>荒漠中部>荒漠腹地.荒漠边缘SOC的δ<sup>13</sup>C值范围为-21.92‰~-17.41‰,且随深度增加而递减;荒漠中部和荒漠腹地的δ<sup>13</sup>C值范围为-25.20‰~-19.30‰,且随深度增加先增后减,由此推断准噶尔盆地南缘荒漠中部和腹地地表植被以C3植物为主,而绿... | zh-cn |
pair_29741053 | Soil salinization and overgrazing are two main factors limiting animal husbandry in the Songnen Grassland. Leymus chinensis is a dominant rhizome grass, resistant to grazing as well as to-lerant to salt stress. Foliar labeled with <sup>15</sup>N-urea was used to study the nitrogen allocation strategy and compensatory g... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 土地盐碱化和过度放牧是制约松嫩平原畜牧业发展的两大因素,羊草是松嫩平原上的优势种,被认为具有较强的耐牧及耐盐碱能力.本文通过田间原位试验,以叶面涂抹标记<sup>15</sup>N-尿素的方法,研究了不同盐碱条件下刈割干扰对羊草的氮素分配策略及补偿生长的影响.结果表明: 总体上叶面新吸收的氮60%以上保留在地上部分.与不施盐碱无刈割处理的对照相比,单纯的盐碱胁迫使新吸收的氮在细根中的分配率显著增加了5.1%;而盐碱胁迫下,中度刈割使叶面新吸收的氮在地上部分的分配率增加了11.6%,地上及总生物量发生超补偿生长,但是重度刈割使叶面新吸收的氮在茎基部的分配率显著增加了9.5%,地上、细根及总生物量均表现为欠补偿生长.上述结果表明盐碱胁迫... | zh-cn |
pair_29741055 | Two-year-old potted Fuji 3 apple trees on different rootstocks [Fuji 3/M. micromalus Makin (joe), Fuji 3/M7 (semi-dwarf) and Fuji 3/M26/M. micromalus Makin (dwarf)] were used to study leaf morphology and photosynthesis and the characteristics of distribution and utilization of <sup>13</sup>C and <sup>15</sup>N at diffe... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 砂培条件下,以2年生烟富3/八棱海棠(乔化)、烟富3/M7(半矮化)和烟富3/M26/八棱海棠(矮化)为试材,采用C、N双标记示踪技术,研究供氮水平(0N、25%N和100%N,100%N为Hoagland完全营养液中的N量)对不同砧穗组合苹果叶片衰老及<sup>13</sup>C、 <sup>15</sup>N分配利用的影响.结果表明:在秋梢停长期,在同一氮素胁迫(0N和25%N)下植株叶片的叶绿素、氮含量和光合速率均以烟富3/八棱海棠最大,其次是烟富3/M7,烟富3/M26/八棱海棠最小,而正常氮素处理(100%N)均以烟富3/M26/八棱海棠最大,其次是烟富3/M7,烟富3/八棱海棠最小;在同一氮素胁迫水平下叶片的SOD和CA... | zh-cn |
pair_29741060 | Organic nitrogen can play an important role in plant growth, and soil pH changed greatly due to the over-use of chemical fertilizers, but the effects of soil pH on the competitive uptake of amino acids by plants and rhizosphere microorganisms are lack of detailed research. To study the effects of soil pH on the uptake ... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 化学合成肥料的大量使用导致土壤pH发生显著变化,但其对植物与根际微生物竞争吸收氨基酸的影响机制尚不明确.本试验通过电解法调节杭州红壤和铁岭棕壤两种土壤pH, 采用外源添加<sup>15</sup>N标记甘氨酸短期吸收4 h的方法,研究了pH对玉米及根际微生物竞争吸收氨基酸的影响.结果表明:土壤pH对玉米根和地上部生物量有显著影响,对于红壤,pH为6.48最适宜玉米生长,且玉米地上部<sup>15</sup>N丰度和<sup>15</sup>N-甘氨酸吸收量也显著高于其他处理;对于棕壤,pH为7.65最适宜玉米生长,其玉米地上部和根系<sup>15</sup>N丰度显著低于pH为5.78处理,但<sup>15</sup>N-甘氨酸吸收... | zh-cn |
pair_29741062 | Stable isotope technique was applied to investigate the small and medium-size consumers including not only fish, shrimps, crabs, cephalopods, snails and bivalves, but also the specimens of their potential carbon sources, which were collected in the marine ranching area of Haizhou Bay during the spring of 2015. IsoSourc... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 基于稳定同位素技术对2015年春季海州湾海洋牧场海域采集的中小型生物消费者,包括鱼类、虾类、蟹类、头足类、螺类和双壳类等与其潜在碳源样品进行分析,利用IsoSource模型计算该海域消费者碳源贡献率,并对2014年夏季生物学样品与2015年春季样品比较,分析食物网营养结构的季节性变化,根据稳定同位素测定结果绘制二维双标图,计算出6种营养结构的量化指标.结果表明: 2015年春季海州湾海洋牧场海域消费者的δ<sup>13</sup>C值范围为-18.9‰~-17.1‰,3种潜在碳源[浮游植物、悬浮颗粒有机物(POM)、沉积物(SOM)]的δ<sup>13</sup>C值范围为-18.1‰~-23.4‰,根据模型计算得出浮游植物对消费者... | zh-cn |
pair_29741064 | Pb stable isotope signatures analysis can be used to identify its sources precisely and the spatial transportation process to achieve precise management of target areas. In this study, 12 surface (0-10 cm) soil samples (3-5 replications for each site) were collected on the Yancheng coast. Pb isotopes (<sup>206</sup>Pb,... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | Pb稳定同位素分析可以精确确定Pb的来源,揭示Pb在空间上的潜在迁移过程,从而对目标区域实行精确的污染管理.研究采集了盐城海岸带12个样方点的表层(0~10 cm)土壤样品,每个样方点3~5个重复,采用等离子光谱质谱仪测定各土壤样品Pb的含量及Pb同位素组成(<sup>206</sup>Pb、<sup>207</sup>Pb、<sup>208</sup>Pb).结果表明:研究区域土壤Pb含量平均值是背景值的1.7倍,参考国家土壤环境质量标准GB 15618—2008,研究区域受到较严重的Pb污染.分析表明,盐城海岸带土壤Pb污染源主要为局地污染源,包括江苏省射阳电厂、双灯纸业芦苇基地污水处理厂和王港闸华丰工业园.采用归一化植被指数(... | zh-cn |
pair_29741065 | The trophic relations of the red-crowned crane species in Zhalong Wetland, northeastern China may change significantly withrapid decrease of biological resources. In this paper, the influence of food resource exhausting on the trophic levels of this vulnerable species was determined by using stable isotope (δ<sup>13</s... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 随着扎龙湿地生物资源的迅速减少,在该地栖息的丹顶鹤种群的营养关系可能发生显著的变化.本文使用稳定同位素(δ<sup>15</sup>N和δ<sup>13</sup>C)监测食物资源的枯竭对丹顶鹤营养位的影响.结果表明:丹顶鹤种群的δ<sup>15</sup>N和δ<sup>13</sup>C的丰度范围分别为6.9‰~8.1‰和-17.8‰~-18.5‰.扎龙湿地系统以大型水禽为食物顶端的食物链长度为3.8±0.2,其中丹顶鹤种群所处的平均营养位为3.1(范围在2.9~3.3).丹顶鹤的δ<sup>15</sup>N的丰度近年波动范围为7.4‰~8.8‰(波动幅度1.4,小于营养位发生显著变化的阈值3.4),这说明在该地区活动的丹顶鹤... | zh-cn |
pair_29741066 | Marine ranching is considered as an efficient tool to protect and restore the coastal fishe-ries resource. In order to assess the ecological impacts of the construction of marine ranching on rocky fishes, the feeding habits of Sebastiscus marmoratus collected at the marine ranching area off Ma'an Archipelago were studi... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 海洋牧场是近岸渔业资源保护和恢复的有效途径,为评估海洋牧场建设对岩礁性鱼类的影响,本文基于马鞍列岛海洋牧场建设前后资源调查数据,利用胃含物分析和稳定同位素测试,研究了褐菖鲉的摄食习性.结果表明:海洋牧场建设前褐菖鲉主要摄食端足类、蟹类和头足类,优势饵料生物种类为麦秆虫、日本枪乌贼、日本蟳、日本岩瓷蟹和滩栖阳遂足等.随体长的增大,蟹类的比例增加,而端足类的比例减少.洋牧场建设后褐菖鲉主要摄食蟹类、端足类和鱼类,优势饵料生物种类为双斑蟳、日本蟳、麦秆虫和赤鼻棱鳀等.随体长的增大,鱼类和蟹类的比例增加,而端足类的比例先增加后减少.根据稳定同位素分析结果,海洋牧场区褐菖鲉可以划分为体长<10.0 cm、10.0~13.9.0 cm和≥14.... | zh-cn |
pair_29741067 | The Daya Bay is a typical subtropical bay in Southern China, and chronically stressed by heavy metal pollution. The bioaccumulation of heavy metals in Daya Bay ecosystem is still unclear. In this study, heavy metals (Cr, Co, Ni, Cu, Zn, Ag, Cd, Pb) and stable isotopes (δ<sup>13</sup>C and δ<sup>15</sup>N) were analyzed... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 大亚湾是受人类活动影响严重的典型亚热带半封闭海湾,长期受到重金属污染的压力,但是重金属在大亚湾生态系统中的累积情况尚不清楚.于2015年夏、冬两季(6月和12月)分别采集海水、沉积物和生物样品(包括浮游生物、游泳生物、底栖生物),在通过稳定同位素(δ<sup>13</sup>C和δ<sup>15</sup>N)构建大亚湾食物网结构的基础上,分析重金属(Cr、Co、Ni、Cu、Zn、Ag、Cd和Pb)在大亚湾食物网中的累积和传递特征.结果表明:大亚湾生物体的主要物质来源于海洋,但也受到淡水输入的影响;大亚湾生态系统的食物链长度较短,最高营养级为3.48;高级捕食者鱼类在夏季摄食广泛,而冬季偏向于底栖食性.大亚湾环境和生物体内重金属浓度... | zh-cn |
pair_29741302 | Our objective was to explore the mechanism of spectral reflectance response to leaf photosynthetic pigment seasonal dynamic of Quercus aliena var. acuteserrata under throughfall elimination. We simulated rainfall decline through throughfall elimination (TFE) treatment in the experiment plots of Baotianman Natural Reser... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 通过林地穿透雨排除的方法模拟降雨减少,测定河南宝天曼自然保护区锐齿栎叶片光合色素含量与反射光谱的季节变化,对减雨处理造成的光合色素变化及其反射光谱的变化进行了定量分析,并探讨了水分控制条件下反射光谱对叶片光合色素变化的响应机制.结果表明: 锐齿栎叶片的光合色素含量和色素比率均呈现明显的季节变化.减雨样地与对照样地叶片的光合色素含量和比率在生长季的各个时期存在差异,其中,叶片叶绿素b(Chl b)含量的差异显著,说明Chl b对减雨处理的敏感性最高,叶片类胡萝卜素(Car)含量的差异较小,说明Car对减雨处理的敏感性相对较弱.550 nm处的光谱反射率对色素季节变化的响应最敏感,以其构造的简单比值指数(<i>SR</i><sub>75... | zh-cn |
pair_29741306 | Based on the data of the field investigation and laboratory and the database of the 8<sup>th</sup> national forestry inventory, ecosystem carbon density, storage amount, and sequestration potential of tree layer were estimated for five typical plantation ecosystems (Robinia pseudoacacia, Populus spp., Pinus tabuliformi... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | None | zh-cn |
pair_29741308 | The relationships between the leaf chlorophyll content (LCC) of Pinus massoniana at different growth stages and their chlorophyll content were analyzed. 7 of 36 red edge-based parameters were finally selected as the typical spectral response parameters which held the most significant statistical relationship with LCC, ... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 分析不同生长期的马尾松冠层反射光谱特征与相应叶绿素含量的相关关系.利用36个红边参数逐一筛选,最终确定7个与叶绿素含量相关性较高的红边参数作为光谱特征参数,分别应用逐步分析法与BP神经网络构建叶绿素含量的高光谱估算模型;同样,筛选出4个植被指数作为光谱特征参数,同时,将对原始光谱进行主成分分析降维后的前4个主成分作为BP神经网络的输入变量,分别应用逐步分析法与BP神经网络构建叶绿素含量的高光谱估算模型.结果表明: 将红边参数作为输入变量建立的逐步回归模型和BP神经网络模型的决定系数(<i>R</i><sup>2</sup>)分别为0.5205、0.7253,均方根误差(RMSE)分别为0.1004、0.0848,相对误差分别为6.3... | zh-cn |
pair_29741310 | In this study, the soil catalase, phosphatase and urease activities of typical plant communities of reed (Phragmites australis) and tamarisk (Tamarix ramosissima) and their influencing factors were investigated in Ebinur Lake wetland. The results showed that three soil enzyme activities of reed and tamarisk had seasona... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 对艾比湖湿地典型芦苇和柽柳群落土壤过氧化氢酶、磷酸酶和脲酶及其影响因素进行了分析.结果表明: 在植物不同的生长期,土壤酶活性具有明显的季节变化特征,芦苇群落土壤过氧化氢酶、磷酸酶和脲酶峰值均出现在生长旺盛期(3.26、0.60、0.33 mg·g<sup>-1</sup>),谷值出现在萌芽期和展叶期,而柽柳群落的峰值出现在枯黄期(6.33、0.58、0.21 mg·g<sup>-1</sup>),谷值出现在开花期和生长旺盛期;脲酶在不同生长期较为稳定,是湿地土壤酶活性差异的指示指标;芦苇和柽柳群落不同生长期土壤酶活性与土壤有机质和全磷含量呈显著正相关,而与土壤含水量的相关性不显著;芦苇群落迅速生长期土壤酶活性与土壤铵态氮呈显著正相关... | zh-cn |
pair_29741312 | In the present study, open top chambers (OTCs) were employed to simulate temperature increase at Fenghuoshan site, located on the hinterland of Qinghai-Tibetan Plateau. To explore the potential response mechanism of alpine plants under warmer temperature, the leaf morphological and antioxidative characteristics of two ... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | None | zh-cn |
pair_29741313 | In order to investigate the effect of fertilization on soil fungal community of Phyllostachys violascens stand, we characterized the abundance and community structure of soil fungi using the methods of terminal restriction fragment length polymorphism (T-RFLP) and real-time quantitative PCR. The experimental treatments... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 为探明施肥处理对雷竹林土壤真菌群落特征的影响,采用末端限制性片段长度多态性(T-RFLP)和荧光定量PCR技术,分析有机肥(M)、化肥(CF)、化肥配施有机肥(CFM)、化肥配施有机肥加覆盖(CFMM)及不施肥(CK)处理土壤真菌群落结构和数量特征.结果表明:施肥显著影响真菌群落结构与多样性,表层(0~20 cm)土壤中M、CFMM处理与CK,亚表层(20~40 cm)土壤中CF、CFMM处理与CK之间真菌群落结构均存在明显差异;且表层土壤中CF、CFMM处理真菌Shannon指数和均匀度指数显著低于CK.M、CFM处理表层土壤真菌数量显著高于CK.土壤有机质、全氮、铵态氮和速效钾含量显著影响了真菌群落结构的变异;全氮、铵态氮、硝态... | zh-cn |
pair_29741314 | The study on microbial community composition in rhizosphere soils surrounding different order roots is of great significance for understanding the interactions between roots and microbes. Using Illumina Miseq sequencing technology, this study analyzed the differences of fungal community structure in bulk soils and rhiz... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 研究不同根序细根根际土壤微生物群落组成结构对深入了解根系-微生物互作关系具有重要意义.本研究采用Illumina MiSeq测序平台,对杨树人工林非根际土壤和不同根序细根根际土壤的真菌群落结构进行分析.物种注释结果显示: 杨树1~2级根(R1)、3级根(R2)和4~5级(R3)根际及非根际土壤(NR)中分别包含128、124、130和101个真菌属,表明杨树根际存在对真菌群落构建的选择性机制.不同根序根际土壤中相对丰度>1%的真菌属有7个,木霉属在1~2级根根际土壤中丰度较高,毛孢子菌属和曲霉属分别是3级根和4~5级根根际土壤中丰度最高的真菌属.<i>α</i>多样性指数表明: 根际土壤真菌的多样性在不同根序间存在显著差异,低级根显... | zh-cn |
pair_29741315 | We conducted detritus input and removal treatment (DIRT) to examine the effects of shifting above- and belowground carbon (C) inputs on soil microbial biomass, community composition and function in subtropical Pinus elliottii, Eucalyptus urophylla × Eucalyptus grandis, Acacia aulacocarpa and Casuarina equisetifolia coa... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 通过在亚热带滨海防护林湿地松、尾巨桉、纹荚相思和木麻黄人工林中设置去除凋落物、去除根系和对照处理,分析改变地上、地下碳输入对沙地人工林土壤微生物生物量、群落结构和功能的影响.2015年9月,在处理设置一年后采集各处理样方0~10 cm土壤样品,分别采用磷脂脂肪酸分析方法和微孔板酶检测技术对土壤样品的微生物群落组成和6种酶活性进行测定.结果表明: 碳输入处理对土壤微生物生物量的影响因树种而异,并主要取决于凋落物和根系的质量.在尾巨桉林中,去除根系使得脂肪酸总量、革兰氏阳性细菌、革兰氏阴性细菌、真菌和放线菌生物量分别显著减少了31%、30%、32%、36%和26%,去除凋落物使得革兰氏阳性细菌、真菌和放线菌生物量显著减少了24%、27%... | zh-cn |
pair_29741316 | To study the effects of nitrogen preserving agent (NPA) on composting process and nitrogen loss of Eichhornia crassipes, an aerobic composting was conducted for 35 days using four treatments. The NPA was prepared by mixing ferrous sulfate, humic acid sodium, and superphosphate (M:M:M=75:20:5). Four treatments were incl... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 为研究保氮剂对水葫芦堆肥进程及氮素损失的影响,以切碎的水葫芦为原料,以硫酸亚铁、腐植酸钠、过磷酸钙按75∶20∶5质量比配制成保氮剂,进行35 d的好氧堆肥试验.试验设置占堆体总质量0%(对照,CK)、1%(PN1)、2%(PN2)、3%(PN3)的保氮剂4个处理,对堆肥过程中堆体理化性质、氮组分含量、氨挥发及氮素损失率进行监测.结果表明: 堆肥高温期,保氮剂处理的堆温明显高于CK,堆体含水量则在降温期显著低于CK(<i>P</i><0.05).堆肥完成后,保氮剂处理的全氮、有机氮含量均显著增加,以PN3处理最高,其全氮、有机氮含量分别比CK高16.3%和13.2%;同时,PN1、PN2、PN3处理的氨挥发总量分别比CK低25.9%... | zh-cn |
pair_29741317 | A field experiment was conducted to study the effects of long-term tillage practices on photosynthetic characteristics of flag leaf, dry matter accumulation and its allocation, and grain yield, with a wheat cultivar, Jimai 22, in both 2013-2014 and 2014-2015 growing seasons. Four tillage practices, namely rotary tillag... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 以济麦22为供试材料,在大田条件下,9年定位设置旋耕(R)、翻耕(P)、间隔2年深松+条旋耕(SRS)、间隔2年深松+旋耕(RS)4种耕作方式,在2014—2015年和2015—2016年小麦生长季研究不同耕作方式对小麦旗叶光合特性、干物质积累与分配和产量的影响.结果表明: SRS处理小麦旗叶净光合速率(<i>P</i><sub>n</sub>)、蒸腾速率(<i>T</i><sub>r</sub>)和气孔导度(<i>g</i><sub>s</sub>)在开花后21~35 d均显著高于其他处理.灌浆期SRS处理平均冠层光合有效辐射(PAR)截获率显著高于RS和P处理,R处理最低.成熟期SRS处理干物质积累量、开花后干物质向籽粒的分配量... | zh-cn |
pair_29741319 | To provide scientific basis for reasonable application of nitrogen and create varieties with high N use-efficiency, an experiment was carried out to study the effects of nitrogen fertilizer application rate on grain yield, N use rate and quality of different rice varieties. Four different genotypic rice varieties, Nipp... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 以不同基因型的水稻品种日本晴、N70、N178和OM052为供试品种,氮肥采用尿素,按基肥(70%)和蘖肥(30%)两次施用,设置3个施氮水平(N用量设0、120、270 kg·hm<sup>-2</sup>)的田间小区试验,研究氮素水平对水稻产量、氮素利用效率和稻米品质的影响,以期为氮肥合理施用和氮高效水稻品种创制提供科学依据.结果表明:施氮能增加水稻品种产量的原因是提高了有效穗数和每穗实粒数;与对照(0 kg·hm<sup>-2</sup>)相比,当施氮量为120和270 kg·hm<sup>-2</sup>时,OM052籽粒产量在4个品种中增幅最大,分别为41.1%和76.8%;品种产量增幅不同是由于氮素利用效率的差异,在12... | zh-cn |
pair_29741323 | An experiment was conducted to investigate soil evaporation (E), crop transpiration (T), evapotranspiration (ET) and the ratio of evaporation to evapotranspiration (E/ET) of drip-irrigated tomato, which was planted in a typical solar greenhouse in the North China, under different water conditions [irrigation amount was... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 2015—2016年在中国农业科学院新乡综合试验基地,以华北地区典型日光温室滴灌番茄为研究对象,分析2种灌溉水平[参考20 cm标准蒸发皿的累积蒸发量(<i>E</i><sub>p</sub>),设置2种灌溉水平(高水: 0.9<i>E</i><sub>p</sub>;低水:0.5<i>E</i><sub>p</sub>)]下番茄不同生育期土壤蒸发(<i>E</i>)、作物蒸腾(<i>T</i>)、蒸发蒸腾(<i>ET</i>)和土壤蒸发占蒸发蒸腾比值(<i>E/ET</i>)的变化,探讨水分亏缺对作物系数(<i>K</i><sub>c</sub>)的影响以及水分胁迫系数(<i>K</i><sub>s</sub>)在全生育期的动态变... | zh-cn |
pair_29741324 | Intercropping of maize and potato, as an important intercropping planting pattern, has a prominent advantage of resource utilization and yield. However, contribution of nutrient uptake and utilization to crop yield advantage and its response to N application rates remain unclear. Through a 2-year plot experiment, inclu... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 玉米与马铃薯间作是重要的间作种植模式,具有较突出的资源利用和产量优势,但养分吸收和利用对作物产量优势的贡献及这种贡献对施氮量的响应机制尚不清楚.本研究采用玉米单作、马铃薯单作和玉米与马铃薯间作3种种植模式,分别设置N<sub>0</sub>(0 kg·hm<sup>-2</sup>)、N<sub>1</sub>(125 kg·hm<sup>-2</sup>)、N<sub>2</sub>(250 kg·hm<sup>-2</sup>)和N<sub>3</sub>(375 kg·hm<sup>-2</sup>)4个氮水平,通过2年田间小区试验,研究不同氮水平下间作产量优势的营养基础.结果表明: 随着施氮量的增加,氮、磷、钾的单作加权平均... | zh-cn |
pair_29741328 | Anxi County, specializing in tea cultivation, was taken as a case in this research. Pearson correlation analysis, ordinary least squares model (OLS) and geographically weighted regression model (GWR) were used to select four primary influence factors of specialization in tea cultivation (i.e., the average elevation, ne... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 以专业化茶叶种植大县安溪县为例,通过评估各乡镇茶叶种植专业化水平,结合Pearson相关分析、普通最小二乘法模型(OLS)和地理加权回归模型(GWR),筛选出平均高程、农民人均纯收入、农业从业人口比重、距交通道路距离4个主要影响安溪县茶叶种植专业化程度的因素,并探讨其对茶叶种植专业化影响程度的空间分异规律.结果表明: 安溪县各乡镇茶叶种植专业化程度呈现显著的空间自相关,以县城为中心,茶叶种植专业化程度由近及远呈现出“低-中-高”的形似杜能农业区位模型的圈层结构;GWR的拟合度(0.624)高于OLS(0.595),且前者对空间数据的解释力更高;与杜能农业区位模型的市场距离决定机制相悖,茶叶种植专业化程度受山地自然环境因素的影响明显较... | zh-cn |
pair_29741333 | Taking Hujiashan small watershed as the study area, based on the classified result of Landsat TM/ETM images of 2005, 2010 and 2015, combined with long-term field observation data, and used the export coefficient model, our study explored the effect of small watershed management project on temporal and spatial variation... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 以丹江口库区胡家山小流域为研究对象,利用2005、2010和2015年3个时期的Landsat TM/ETM遥感影像,结合长期野外观测资料,应用输出系数模型,在GIS技术支持下,研究了以坡改梯工程为主要内容的小流域综合治理工程实施前后,流域非点源污染总氮(TN)负荷的时空变化及其影响因素.结果表明: 由于坡改梯工程的实施,流域内坡度15°以上区域的耕地面积明显增加,林地和荒地面积有所减少.流域非点源污染TN负荷由工程实施前的63028 kg增加到2010年的72778 kg ,实施后则降低到46876 kg.其中,农村生活的贡献率较高,3期平均贡献率为53.5%,但呈逐年减少趋势;土地利用的贡献率平均为45%,呈逐年增加趋势;畜禽养... | zh-cn |
pair_29741335 | Based on the data of the benthic macro-invertebrates community in the Phragmites australis marsh in the Dongtan Wetland of the Yangtze River estuary collected from May 2015 to April 2016, we evaluated the monthly variations in the species composition, biodiversity and community structure of the benthic macro-invertebra... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 2015年5月至2016年4月对长江口东滩湿地芦苇生境的大型底栖无脊椎动物群落结构进行监测,分析了该生境下底栖动物群落物种组成和多样性的月变化.结果表明: 芦苇株高和盖度均在3—8月逐渐增大,9月后逐渐降低;芦苇密度和地上生物量(干质量)均在7月达到最大值.调查期间,共发现大型无脊椎底栖动物20种(包括2种鉴定到属,2种鉴定到科).其中,腹足纲种类最多,有11种(包括1种鉴定到属);软甲纲有5种;昆虫纲和多毛纲均只有2种.以緋拟沼螺、堇拟沼螺和尖锥似蟹守螺等为主要优势种.从生活型来看,底上附着型种类数最多(11种),其次为穴居型(5种)和底内型(4种).大型底栖动物密度和生物量存在明显的季节或月变化,夏季(8月)出现全年最高值.Ma... | zh-cn |
pair_29741336 | From 3177 specimens of purple flying squid Sthenoteuthis oualaniensis collected in 2012 and 2013 in the central and southern South China Sea, the morphological indicators including mantle length (ML), arm length-I (AL1), arm length-2 (AL2), arm length-3 (AL3), arm length-4 (AL4), tentacle length (TL), fin length (FL) a... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 根据2012和2013年在南海中南部采集到的3177尾鸢乌贼中型群样品,对其胴长(ML)、右第一腕长(AL1)、右第二腕长(AL2)、右第三腕长(AL3)、右第四腕长(AL4)、右触腕长(TL)、鳍长(FL)和鳍宽(FW)等形态参数进行测定,并运用主成分分析等方法对其个体的形态差异进行研究.结果表明: 研究海域的鸢乌贼中型群可分为Ⅰ和Ⅱ 2个群体,分别占总数的69%和31%.2个群体的雌性比例均随胴长的增大呈先减少后增加的趋势,直至达到100%;群体Ⅰ雌性和雄性的初次性成熟胴长分别为164和112 mm,群体Ⅱ雌性和雄性初次性成熟胴长分别为157和108 mm.群体Ⅰ在西沙海域和南沙海域均有独立分布区域,而群体Ⅱ密集区主要分布于南沙... | zh-cn |
pair_29741337 | Both Hemibarbus labeo and H. medius (Cypriniformes: Cyprinidae: Gobioninae) are primary freshwater fishes and are widely distributed. As such, they provide an ideal model for phylogeographical studies. However, the similarity in morphological characters between these two species made the description of their distributi... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 唇鱼骨和间鱼骨均为分布较广的初级淡水鱼类,是理想的亲缘地理研究材料;且两者形态特征较为相似,不易鉴别,故两者的分布记述和物种有效性存在争议.为了解我国南部唇鱼骨和间鱼骨的群体遗传结构并探讨两者的物种有效性,本研究对8条水系的唇鱼骨和9条水系的间鱼骨共130尾个体的<i>COI</i>和<i>ND5</i>基因序列片段进行了测定,并对这两个基因的组合序列(2151 bp)进行了分析.结果表明: 在130尾个体的<i>COI</i>和<i>ND5</i>基因组合序列中,共有196个核苷酸变异位点,共检测出50个单倍型,单倍型多样性为0.964,核苷酸多样性为0.019,遗传多样性较高.基于<i>COI</i>和<i>ND5</i>基因组... | zh-cn |
pair_29741338 | With the development of urbanization, the effect of urban heat island has become increasingly evident. As an essential component of the urban natural landscapes, urban green space plays an important role in mitigating the effect of urban heat island. However, facing the rapid urbanization and changing environment, how ... | en | lexi-ml/wmt_22_dataset_en_zh-cn | train | text | 随着城市化进程的不断推进,城市热岛效应日益明显.城市绿地作为城市结构中的自然生产力主体,在缓解城市热岛效应方面发挥着极其重要的作用.然而,面对快速城市化进程和不断变化的环境,如何实现城市绿地的合理配置与前瞻性布局,从而实现其整体降温效应的最大化,进而改善城市环境与微气候,依然是一个亟待解决的难题.这迫切需要多尺度的城市绿地降温效应研究.本文对基于气温实地观测来探讨城市绿地降温效应的相关研究进行了系统梳理与总结,从城市绿地的面积与形状特征、植被结构特征、影响降温效应的外部因素3个方面深入探讨了影响绿地降温效应的主要因素,并从城市绿地降温的时间变化特征和距离衰减效应两方面总结了绿地降温效应的时空特征.在此基础上,指出了目前城市绿地降温效... | zh-cn |
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