土壤生物

The terrestrialand aquatic environmental impacts of veterinary drugs was expounded both on terrestrial environmental impacts of veterinary drugs upon plants, soil animals, soil microorganism and protozoa, and ecotoxicity of veterinary drugs to plankton, microorganism, fish and Crustacea.

综述了兽药对陆生和水生生态环境影响方面的研究进展，探讨了兽药对陆生植物、土壤动物、土壤微生物与原生生物等陆生生态环境的影响及对浮游类生物与微生物、鱼虾与水体甲壳动物等水生生态环境的影响及其生态毒理效应。

Hence,in this study, the change of soil microbial communities were investigated through direct current field ,which is supposed of provide a theory basis for soil electrokinetic bioremediation technology.

而电场作用下土壤微生物群落的变化与利用电场生物修复效率密切相关，本文鉴此研究了直流电场作用下对土壤微生物群落多样性的变化规律，以期为电动生物修复技术的应用提供了一定的科学理论依据。

The optimum degradation rate of LAS was found in fluvial soil,at 8 d and 25 ℃ with 20 mg·kg-1 of LAS,the degradation rate of LAS reached 33.2%.

外源有机污染物在土壤中的环境效应已成为环境科学的研究热点，目前，对LAS的研究多集中在污水处理和对生物的影响方面[1～5]，对在土壤中的生物效应和自然降解条件优化的研究还很少。

So biological nitrogen fixation has become one of the main directions for today's fertilizer development in the world.

生物固氮不仅固氮量大，而且还可提高土壤肥力，改善土壤条件，不污染环境；更为重要的是它有取之不尽，用之不竭的廉价氮源，成本低，利用率高，因此，生物固氮是今后肥料发展的主要方向之一。

The results show that the global N\-2O emission per year is about 14.7 TgN\-2O\|N, in which 57% and 43% from natural and anthropogenic sources respectively, 92% from N biogeochemistry and only 8% from N abiology, 70% from soil\|related sources, and about 20% attributable to agricultural soil.

得出全球N2 O年释放总量约 1 4 。7TgN2 O -N ，其中自然源和人为源分别占 57%和 4 3 %。年释放总量中N的生物地球化学过程约贡献92 %、非生物作用过程仅贡献 8%；与土壤有关的释放源约贡献 70 %、农业土壤贡献2 0 %。

It is concluded that the soil easily mineralizable nitrogen and microbial biomass nitrogen can be taken as the biological ...

在盆栽试验条件下，土壤易矿化有机态氮和种植前土壤微生物态氮能够较好地反映土壤氮素的矿化和供应能力，可以作为土壤氮素的生物有效性指标。

It is concluded that the soil easily mineralizable nitrogen and microbial biomass nitrogen can be taken as the biological available index for soil nitrogen mineralization and availability in the pot experiment.

在盆栽试验条件下，土壤易矿化有机态氮和种植前土壤微生物态氮能够较好地反映土壤氮素的矿化和供应能力，可以作为土壤氮素的生物有效性指标。

It is involved in many aspects of organic matter decomposition, partial regulation of microbial activities, nutrient cycles and crumbly structure. Depending on their diet (saprophagous, phytophagous or predation), soil fauna is closely linked both to each other and to microorganisms, plants and soil.

本论文试图以土壤动物作为生物指标来评价土壤重金属污染，通过对重金属污染区(以浙江省富阳环山乡受污染的农田为例)土壤动物群落结构的调查和在室内设置一定的污染浓度梯度处理的盆栽试验两种方式研究了重金属污染对土壤动物群落的影响，主要结论如下： 1。

Don Hara. etc species for agricultural objects, and Eucommia ulmoides, Pterocarya stenoptera, Sinocalamus affinis etc species for reforestation objects.

通过土地单元间农林复合系统土壤呼吸以及土壤水分、养分等常规测定，筛选出林地—经济林—梯地、坡耕地—林地—经济林2种拓扑结构的土地单元间农林复合系统，并提出了生物带、生物埂功能调控技术。

The increasing of soil Bray-1 phosphorus was significantly correlated to the dissolved labile phosphorus (p 0.001), and the phosphorus leaching loss under the precipitation of two-times of normal precipitation is more than 3.6 times than that of normal precipitation.

生物固形物的施用会造成表层0-10 cm土壤Bray-1磷的累积，由於土壤中Bray-1磷浓度与洗出液中溶解性反应磷的流失量有显著相关(p 0.001)，且两倍雨量淋洗下洗出液中磷的流失量是正常雨量下的3.6倍，因此，生物固形物的施用仍须考量磷流失的风险。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。