土壤生物

AM may reduce the amount of extractable residues of acenaphthene, however, the extractable fractions account for 65.7%-81.7% of total residues of acenaphthene in soils after 55-day incubation, having a toxic risk to organisms.

AM作用能降低土壤中危可提取态残留含量；但培养55天后土壤中仍有65.7%~81.7%苊属于可提取态残留，对生物有毒害风险。

Progress in the taxonomy of the actinomycetes and acidophilic actinomycetes was introduced in this paper. The diversity of acidophilic rare Actinomycetes from acidic soil was studied and a polyphasic study was undertaken to establish the taxonomic position of three soil isolates.

本文介绍了放线菌和嗜酸放线菌的分类学研究进展，研究了我国酸性土壤中稀有放线菌的生物多样性，并采用以分子分类、系统发育学分析、化学分类、形态特征和生理生化特性相结合的多相分类方法对3株土壤新分离菌株进行了分类学研究。

For long time, in the study filed of saline and alkali soil ecology, the research has been focused on plant physiology and bio-ecology.

盐渍化土壤改良与利用是世界范围内所面临的难题，长期以来在盐渍化土壤生态学研究领域内，人们以实现生物改良与利用为主要目标，开展了许多盐生植物生理生态的科学研究。

The relation between soil acidification and nitrogen cycle disturbed by man made factors was studied from the viewpoint of biogeochemical cycle, and the mechanism of soil acidification induced by disturbed nitrogen cycle was probed.

从生物地球化学循环的观点出发，研究了 N 循环的人为干扰与土壤酸化的关系，并探讨了 N 循环扰动下导致土壤酸化的机理。

Major Fields include Animal Sciences, Biological and Environmental Engineering, Biological Sciences, Biometry and Statistics, Crop and Soil Sciences, Entomology, Food Science, Natural Resources, Nutrition, Food and Agriculture, Plant Sciences.

主要学科领域涉及动物科学、生物和环境工程学、生物科学、生物统计学、农作物和土壤科学、昆虫学、食品科学、自然资源、营养学、食物与农业、植物科学等。

Carabid beetle was selected as bioindicators and pitfall trapping was used as sampling method for animal biodiversity evaluation; for flora evaluation, both field experiment and releve approach were used with assistance of remote sensing image; for the evaluation of soil organic carbon change, a Regional Resources and environmental information system was established; and RS, GIS and biogeochemistry model were all used to evaluate the soil organic carbon change.

生物多样性研究中，动物多样性研究部分以步甲作为指示生物展开，方法为陷阱法；植物多样性研究部分采用田间试验以及遥感影像配合下的样方记录法；对区域土壤有机碳变化的研究采用遥感、地理信息系统和生物地球化学循环模型模拟相结合的方法。

But systematic research concerning continuous mono-cropping grafted cucumber obstacle isn't reported. This paper systematically studied the effect of continuous cropping soil on grafted cucumber in aspect of its growth, yield and edaphon in pot experiments. Further more, root exudates of squash and grafted cucumber were collected by solution cultivate and adsorption of XAD-4 resins, and bioassay of the root exudates was did with cucumber and squash as receptors, studied allelopathy of grafted cucumber and squash root exudates on cucumber and squash , physiobiochemistry as well as.

本项研究采用盆栽试验以不同连作年限的土壤为基质比较系统地研究了连作年限对嫁接黄瓜的生长、产量和土壤微生物的影响；采用水培和XAD-4树脂吸附法分别收集嫁接黄瓜和砧木南瓜的根系分泌物并以黄瓜、南瓜为受体进行生物活性测定，并对嫁接黄瓜及其砧木南瓜根系分泌物化感作用的生理机制进行了初步探索。

However,the soil moisture content at soil depths of 45 cm and 60 cm in the areas with microbiotic crusts is much lower than that in the areas without microbiotic crusts(LSD-test,p.05),which reveals that the microbiotic crusts have high capability of maintaining topsoil moisture.

在世界干旱区的大量研究表明，作为荒漠生态系统的重要成分，生物结皮的形成能够增强土壤抗风蚀及水蚀的能力〔3~8〕、增强其周围维管植物的养分循环〔9~11〕、通过生物固氮提供丰富的氮源〔12〕、促进种子库的建立和生物多样性等。

The study indicates that the content of soil carbon is on the low side because human behavior has a negative effect on sloping cropland. However, the content of every group soil carbon increased drastically by planting Robinia . With the increasing of the time of conservation, the relationship is very remarkable. After 50 years of restoration, the content of TOC, LOC, NLOC and AI in the study plot increased by 271%,174%, 467%, and 271%, respectively, compared with sloping cropland. The increasing speed of NLOC was faster than LOC. It is assumed that the increased carbon by restoration is stored in an inactive form to produce active matter which is necessary for biont. And the soil carbon must keep active to fulfill the balance of carbon dynamic transformation. At initial stages, soil carbon management index increased remarkably.

营造刺槐林可以显著增加土壤碳库各组分含量，并随恢复年限呈显著线性关系，50a时TOC、LOC、NLOC和碳库指数分别较坡耕地增加271%、174%、467%和271%，其中NLOC增加速率略高于LOC，表明植被恢复增加的土壤碳素绝大多数以非活性形态贮存起来，而为了满足生物生长所必须的活性物质来源，土壤碳库必须维持一定的活度状态来满足碳素的动态转化平衡，碳库管理指数在营造刺槐林初期显著降低，随后先增加后降低，与刺槐林生长特性密切相关；但与天然林相比差距仍然较大，恢复50a时TOC、LOC和NLOC仅为侧柏林的49%、34%和61%。

This experiment is mainy study the effect of peat on soil property and biology of peach tree.

本试验研究草炭对桃园土壤理化性状和桃树生物效应的影响，旨在为探讨利用草炭增强果园土壤肥力、提高桃果实品质等提供新的土壤管理模式。主要结果分析如下： 1。

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。