查询词典 infertile soil

In order to get the relationship between mental pollution in soil and vegetables and support green vegetable production, five kinds of common foliage vegetables(Lettuce Plant, Schizonepeta Tenuifolia Briq, Lpomoea aquelica, lettuce, Amaranthus hypochondriacus) were taken as experimental materials to study the correlation between the polluted vegetables and the soil of different concentration of Cd cultivated in greenhouse. The soil pollution threshold values to produce the green vegetables were analyzed.

为探求土壤重金属污染和蔬菜污染的相关性，为绿色蔬菜生产提供技术支持，该研究以郑州市常见的5种叶菜类蔬菜(油麦菜、荆芥、蕹菜、生菜、苋菜)为试验材料，采用温室盆栽土培试验方法研究了土壤不同浓度 Cd污染与蔬菜污染的相关性，并对绿色蔬菜生产要求的土壤污染阈限值进行了分析。

In order to develop the cultivation techniques for high quality of foxtail millet , the ex-periments were accomplished in red soil, loess soil, red-loess soil and different elevations.

为了提高人民生活质量，开发优质蛋白质是优质栽培的重要内容川，谷子蛋白质是禾谷类作物中的优质蛋白质川。

This paper establishes a comprehensive evaluation index system frame of improvement rate of soil and water loss by adopting survey data of soil and water loss in several typical regions from water and soil resources, ecological environment and economic development.

采用典型区域水土流失详查，从水土资源、生态与环境、经济发展等方面构建了水土流失治理率综合评价指标体系框架。

By use of the method of integral equation, the second kind Fredholm's integral equation was deduced to solve the interaction factors of pile-pile, pile-soil and soil-soil. Using the principle of superposition, the piled raft foundation was calculated. The validity of the proposed method was verified through comparison with solutions obtained using other methods by existing theories of elasticity.

采用积分方程法推导出求解桩－桩、桩－土和土－土间相互作用系数所需要的第二类Fredholm积分方程，利用叠加原理对桩筏基础进行计算分析，通过与常规弹性理论方法计算结果的比较验证了本文方法的正确性。

Using rice-wheat rotation system as studied objective, to study the effect of free air CO2 enrichment on soil microorganism, to probe the response and adaptation ability of soil microorganism to future global change, and to expound the relationship with soil carbon and nitrogen transformation.

研究农田自由大气CO2浓度升高对土壤微生物的影响，探讨土壤微生物对未来全球变化的响应及适应能力，并阐明与土壤碳和氮转化的关系。

In order to evaluate the risk of groundwater contamination resulting from pesticide leaching, a new fugacity model was developed on the basis of former researchers'work. In this model soil was divided into two compartments: unsaturated consisted of three subcompartments: air, water, and soil solid, and saturated phase consisted of two subcompartments: water and soil solid.

在上述实验研究的基础上，结合农药污染地下水的研究在环境中的重要性，提出了一种包含地下水相在内的土壤多介质环境逸度模型，把土壤分为不饱和层相（由空气、水、土壤固体三个亚环境相组成）和地下蓄水层相，用来评价农药对地下水污染的情况。

This case are same to light, moderate arid severe erosion type, which turn out to be a curve similar to Gaussian distribution, but soil erosion types at the two sides of the curve are totally different, in the left side of the curve, soil erosion are dominated by moderate and severe erosion type, arid in the right side of the curve, mainly soil erosion type is light erosion.

这种情况对于轻度、中度及强度土壤侵蚀的影响是类似的，都呈类正态分布的曲线形式，但在曲线的两侧土壤侵蚀类型是有本质区别的，在曲线的左侧土壤侵蚀类型的分布是中度和强度为主，而在曲线右侧则以轻度为主。

To study the spatial variability of the sandy desertification soil on the Erdos Plateau, the water content of top soil(0～30cm) under different landforms was measured, and analysed by geostatics methools; and; each layer's water content was measured on some typical soil profiles along the landform section.

为了研究鄂尔多斯夏初不同地形土壤水分的空间变异规律，本试验在鄂尔多斯高原几种地形的沙质荒漠化土壤上，用时域反射仪测定表层土壤(0～ 30 cm)的含水量，对表层土壤水分分布特征进行分析；在不同地形部位选择典型土壤剖面，测定各层土壤含水量。

The research results of vegetation recovery and soil erosion characteristic in corroded ditch of purple soil hills using plant-fencing are:(1) The balsamroot and giant reed can shape plant-fencing in half of year and the effect of preventing soil erosion is remarkable.

植物活篱笆恢复紫色土侵蚀沟植被及水土流失特征研究结果：(1)香根草、芦竹栽植半年即可形成植物篱笆，防治水土流失效果显著。

Among the three types of parent material,the yield of rape( above-ground dry weight) was the best(NPK treatment was the best in purplish soil ), Quaternary red soil and in granitization red soil were followed respectively(both of the two types of parent material have weak growth vigor and have a consistent yield). 2.With plant rape,NPK treatment could get more harvest among the three types of parent material , M treatment and CK were followed restectively.

结果表明：1、三种母质以紫色土油菜产量为最高（紫色土以NPK处理为最高），四纪红土次之，花岗岩油菜产量为最低（二种母质油菜生长均不好，产量差不多）。2、三种母质种植油菜均以NPK处理为最高。

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。