土壤性质

Additionally,relative enrichment factors had no significant correlation with 1g K_ in both soil profiles,indicating that PAHs behaviors in soil profile were not influenced by their physicochemical characteristics but other factors(such as eluviate and organism disturbing).

另外，水稻种植前后土壤剖面PAHs相对富集系数与1g k_相关性均不明显，表明PAHs自身理化性质对其迁移特征影响较弱，其他作用机制影响较强。

Based on the fieldwork , this paper deals with the structure of exogenic force in the north terrain of loess hilly gulied plateau in north Shaanxi Province. The author thinks that the structure research is a key to reco-gnize the feature of the local landform and its development.

根据野外初步观察，提出陕能黄土高原北部半干旱边缘地带的侵蚀营力结构问题进行讨论，分析了营力性质构成及营力结构的地域分异，对综合分析本区的土壤侵蚀问题有一定意义。

In our studies,sludges composting was used as object, fluoranthene was on behalf of PAHs,and methods included dynamic sampling,room analysis,sludges' composting,leaching of soil column,and room culture were employed. The main contents include:the concentration and the distribution of PAHs in municipal sludges in Jiangsu Province,effects of composting on the concentration of PAHs in municipal sludges,the physicochemical properties of water dissolved organic matters in sludges before and after composting,effects of sludges composting and DOM on the desorption-leaching and eco-toxicity of FLT in polluted soil,and primary investigation of mechanism on same phenomena.

本论文以污泥堆肥为原料，以荧蒽(fluoranthene，FLT)为PAH的代表，采用动态取样、室内分析、污泥堆肥、土柱淋滤和室内培养等方法，系统研究了江苏城市污泥中PAHs的含量以及分布模式；堆肥对污泥中PAHs含量的影响；污泥堆肥前后水溶性有机物的理化性质特征变化；污泥堆肥对污染土壤中FLT解吸-淋滤、以及生态毒性的影响，并对有关现象进行了机理探讨。

The influences of temperature on hydrological and mechanical properties of the media are considered in the present model.

在所建立的数学模型中更充分的考虑了温度对土壤水力、力学性质的影响。

For example, the depth of mountain tundra soil profile was 75 cm, and apparent 14C ages was 1315 a; the depth of brown coniferous forest soil profile was 40 cm, and apparent 14C ages was 870a; the depth of lessive black brown soil was 120 cm, and apparent 14C ages was 5145 a.

这不仅是由于它们的生化性质及其化学组成不同而造成的，而且还因为土壤有机质分解与累积相互影响制约的结果。

The kinectics characteristics of the nonexchangeable potassium release from the soil in Shaanxi is investigated with the Hsaturated resin absorbing method.

采用H饱和树脂吸收法研究了陕西6种土壤非交换钾释放的动力学性质。

CO〓 and soil water affected aphid population indirectly through the direct effects on the wheat characteristics. The population increase was due to both high adult fecundity and shortened nymphal period.

3在700ppm范围内CO〓对禾谷缢管蚜的直接影响很小，CO〓和土壤水分对禾谷缢管蚜种群的影响主要来源于间接影响，即通过影响小麦的理化性质进而影响蚜虫的个体行为和种群大小。

Through field survey and the investigation of the aerial photograph,we have found that the geographical landscape of the seashore belt shows distinct photographical characteristics on the aerial photograph.

通过实地调查和航片研究，发现海岸带地理景观在航片上具有明显的影象特征，其中尤以海岸动力地貌和盐土植被在航片上最富有特征，而海岸地貌和植被与土壤的性质和分布又具有很好的相关性。

For saturated soil,a membrane cell was designed to measure the effective diffusion coefficient.In this study,the theory of fractal dimension was also used to calculate the cell constant of bacteria and the tortuosity factor of soil membrane.

近年来国外学者对微生物在多孔介质中的物理迁移过程研究报道颇丰，主要关于微生物在土壤地下水体系中的扩散系数、吸附性质和微孔堵塞等方面[1-3]。

The effective hydraulic properties of unsaturated soil are the key parameters in the quantitative modeling of water flow and solute transport in the vadose zone, which can be predicted by the pore network model.

非饱和土壤的水力性质是采用模型定量模拟水分和溶质在非饱和带中运动的最重要的物理参数，可以用网络模型来预测。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐