查询词典 infertile soil

In August,there are obvious changes among different treatments under soil water stressconditions. Vs, and Vs/Va obviously raised while Va reduced, and tissue water contentalso changed. Comparing with that in July, water content of leaves in differenttreatments in August decreased by 18.06%, 2.57%, 4.82% and 9.94%, respectively.In August and September, diurnal average Tr under different treatments (light,medium, heavy and no soil water stress conditions ) are 80.90 mmolh_2Om~(-2)s~(-1)、76.37mmolh_2Om~(-2)s~(-1)、65.46 mmolh_2Om~(-2)s~(-1)、42.11 mmolh_2Om~(-2)s~(-1) and 40.60mmolh_2Om~(-2)s~(-1)、33.92 mmolh_2Om~(-2)s~(-1)、30.44 mmolh_2Om~(-2)s~(-1)、23.29 mmolh_2Om~(-2)s~(-1),respectively. It shows that the Tr of Atriplex canescens leaves takes a tendency ofdeclining under long-term soil water stress conditions.

随着土壤水分胁迫时间延长到8月份，各处理间相比发生了显著变化，其中Vs、Vs／Va显著升高，Va的降低，而组织含水量也发生了显著的变化；8月份各处理间(无土壤水分胁迫、轻度土壤水分胁迫、中度土壤水分胁迫和重度水分胁迫)与7月份相比叶片含水量分别降低了18.06％、2.57％、4.82％、9.94％；在8月份和9月份轻度土壤水分胁迫、中度土壤水分胁迫、重度土壤水分胁迫和无土壤水分胁迫的Tr的日均值分别为80.90 molh_2Om~(-2)s~(-1)、76.37mmolh_2Om~(-2)s~(-1)、65.46 mmolh_2Om~(-2)s~(-1)、42.11 mmolh_2Om~(-2)s~(-1)和40.60 molh_2Om~(-2)s~(-1)、33.92 mmolh_2Om~(-2)s~(-1)、30.44 mmolh_2Om~(-2)s~(-1)、23.29 mmolh_2Om~(-2)s~(-1)，说明四翅滨藜在长期的土壤水分胁迫胁迫下叶片的蒸腾速率呈现出下降的趋势。

In clover lands, there is decreasing soil organic matter and other nutrients, and soil physical properties are better with lower salinity due to less human disturbance. On other hand, azotobacter of legume increases the available nitrogen content in surface soil.

苜蓿地由于管理粗放，对土壤扰动少，容重较低，孔隙度和毛管孔隙度较高，盐碱度较低；每年对苜蓿的采收显著降低了苜蓿地土壤有机质和养分含量，而豆科固氮菌的存在，使表层速效氮含量较高。

It reveals that the remediation increases the quantity of bacteria and azotobacter which is propitious to increase the soil fertility. In different period, soil enzyme activity, physical-chemical activity and soil microbial community is varying.

测定了施加土壤调理剂后不同时期土壤酶活性、理化因子、微生物种群等的变化，表明土壤调理剂起作用是一个渐变的过程，不同时期土壤的各种肥力因素是变化的。

As temperature increased from 40 to 70℃, ferric reduction capacity of microorganism biocoenosis from Jilin, Tianjin and Hunan paddy soil were restrained to a certain extent. Adding AQDS could increase ferric reduction rate of microorganisms biocoenosis from Jilin, Tianjin and Sichuan paddy soil significantly. In axenic culture treatment of 6 kinds of bacterial strain experiments from Sichuan and Jiangxi paddy soil, a bacterial strain was suitable to 50℃.

于40~70℃升温处理后，来源于吉林、天津和湖南水稻土微生物群落的铁还原能力受到一定程度抑制；添加AQDS可显著增加来源于吉林、天津和四川水稻土的3种微生物群落的铁还原反应速率；在6株铁还原菌的纯培养试验中发现了1株更适于在50℃下生长的菌株。

Soil microbes are the important components of soil ecosystem, exhibiting the important role in biogeochemical cycle. They are very sensitive to the changes of soil environments.

土壤微生物是土壤生态系统的重要组分，在生物地球化学循环过程中有重要的作用，对土壤环境变化和胁迫的反应十分灵敏。

In this study, the calcium contents in Red Fuji fruit as well as in Burozem, cinnamon soil, Fluvio-aquio soil, Gravel blackland, Salinized soil sampled from Red Fuji orchard were investigated.

对山东省棕壤、褐土、潮土、砂礓黑土和盐碱土五种果园土壤及其栽培的红富士苹果进行了钙素营养分析。

This study uses the soil parameter reduction coefficients to model the seismic pile responses affected by liquefied soils. One dimensional wave equation analyses were conducted for the solutions. Based on the bore-hole data and nearby seismic record, the soil parameter reduction coefficients of liquefied layers can be obtained through a pre-analysis for liquefaction potential of the site. The reduction coefficients were used to reduce the soil modulus for liquefied soils, and the lumped mass analysis is performed to obtain the free-field response of the site. The ground deformations are superimposed onto the pile elements for discrete wave equation analysis, and the non-linear pile responses can be simulated through the modified Bouc-Wen model. Thus the deformations and failure mechanism of the pile are able to investigate.

中文摘要本研究之土质参数折减系数模式，系以一维波动方程模拟地盘液化状态下之桩基础动力反应，依据现场土层钻探资料与邻近测站之地震纪录，由土壤液化潜能评估法配合日本相关规范求得液化土层之土质参数折减系数，以此系数对土壤强度模数进行折减，并使用集中质块法求取自由场之地盘液化反应，再以此为前置解作用於桩基础之波动方程求解，桩身刚度以简化之Bouc-Wen模式模拟其非线性行为，以了解液化地盘内基桩之变形行为与破坏机制。

The model includes that the relationship between median diameter, as well kinetic energy, of raindrop and rainfall intensity obeys logarithmic function, the critical slope degree of soil erosion is 38.4°～43.0° in test area and the best multiple index of rainfall erosivity value is /100. Employing the prediction model, the soil erodibility value, the accelerated value of excavation slope, roadbed slope, construction site, borrow pit, service road and other temporary occupation land and the loss-spoil ration of waste pile were examined. Finally, the integrated soil and water conservation measures in highway construction project have been suggested.

从而建立了凉山州天然降雨雨滴中数直径与雨强的关系和降雨强度与动能的关系，分析了高速公路引起水土流失的侵蚀性降雨标准、侵蚀转折坡度及不同流失区流失量的大小关系，给出了高速公路水土流失预测模式中降雨侵蚀力尺值的最佳复合指标，估算出路堤边坡、路堑开挖边坡、路基、临时施工用地、取土场、便道和其它临时占地的可蚀性K值、加速侵蚀系数A值以及的弃土场的流弃比B值，最后针对高速公路不同防治区水土流失特点提出了相应的综合防治措施。

To investigate variation of soil bacteria community in response to the change in the above-ground vegetation, soil samples were collected at three sites, i.e. bamboo groves, mixture of bamboo and broadleaf tree and broadleaf forest. To explore variation of the soil bacterial structure, 16S-rDNA-V3-fragment-base DGGE (denaturing gradient gel electrophoresis) and clone sequence BLAST technologies were applied.

为了解毛竹人侵天然林后地下土壤微生物多样性的变化，分别采集了毛竹纯林、竹阔混交林和原始天然阔叶林下的土壤样品，应用建立于165 rDNA V3区片段的变性梯度凝胶电泳和克隆测序比对来研究土壤细菌结构的变化。

The results showed that the maximum height of the capillary water rise of layered soil was mainly determined by the sand soil texture, position, thickness and their mutual relationship, and they also were closer connected with other soil texture in the profile.

针对目前层状土体剖面夹层土质对毛管水分最大上升高度的影响存在较大分歧，以沙土夹层为例，从土坡水动力学的角度，通过实验和理论分析，分不同情况对层状土城的毛管水最大上升高度进行了系统研究。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。