土壤生物

Soil biota can change the physical, chemical and biological characters of soil in different ways.

土壤生物以不同的方式改变着土壤的物理、化学和生物学特性。

To understand the impact of plant canopy photosynthate inputs on soil nematode communities, a large-scale tree girdling experiment was conducted in a evergreen broad-leaved forest of Ailao Mountains.

3为了解植物光合产物通过根系实现的地下资源输入对土壤生物的影响，本研究通过大规模的环割实验切断植物向地下运输光合作用产物的通道，研究了环割前后土壤微生物生物量、土壤线虫密度和多样性的变化。

The quality of reclamation soil,mainly including the methods of soil restructuring,the change of physical-chemical features and the organism activation,was analyzed at present,there are two ways to restructured soil: filling and infilling reclamation.

该文对复垦土壤质量进行了综述，主要对土壤重构的方法；重构土壤的物理、化学性状的变化；重构土壤生物活性等方面进行分析。

The main results are: construction of Tarim desert highway shelter-forest promoted soil microbial development, and with increase of plantation time of the shelter-forest, the quantity, fatty acid diversity index of soil microbe and diversity index of bacterial DNA segment enhanced notably. As to soil microbial community structure, bacteria are dominant population with amounting for over 80% of total soil microbe, and fungi is not more than 1% of total soil microbe, but soil microbial community structure was different among three soil layers. The conclusions from study methods of conventional culture, biological marker and molecule biology were almost identical, which illuminates that construction of Tarim desert highway made soil microbial activity enhance and so promote nutrient cycle and utilization of Tarim desert highway shelter-forest land.

结果表明，塔里木沙漠公路防护林的建设促进了风沙土土壤微生物的发育，随着防护林定植年限的增加，土壤微生物数量、脂肪酸和细菌DNA片段的多样性指数明显增大；土壤微生物区系组成中，细菌是优势类群，占微生物总数80%以上，而真菌很少，不到微生物总数1%，但在不同土层间有所差异；传统培养法与现代生物标记和分子生物学方法对塔里木沙漠公路防护林地土壤微生物多样性的研究结果基本一致，说明塔里木沙漠公路防护林的建设使林地土壤生物活性有所增强，有利于林地土壤养分循环与利用。

The possible use of arbuscular mycorrhizal symbiosis for bioremediation of heavy metal contaminated soils was sug...

针对目前土壤生物修复技术体系存在的局限性和土壤重金属污染的复杂多样性，提出应用丛枝菌根修复重金属污染土壤的新思路。

Evapotranspiration value and transpiration indexes of the three types of soil microbiotic crust under different water content(including Bryum argenteum crust,Didymodon nigrescens crust and algal crust) were measured.

通过对3种土壤生物结皮在对照和3个不同水分条件下进行蒸散量以及蒸腾指标的观测，结果表明：①3种土壤生物结皮蒸散量日变化过程呈现单峰型，各个处理间峰值出现时间和蒸散量变化幅度差异较大；真藓对照组峰值为0.473 g/10 cm2，出现时间为11：00时。

Being a protective tillage, the no-tillage means getting rid of not only the tillage before sowing, but also the intertill after sowing, and leaving the plant residue after harvesting.

中文题名稻田自然免耕体系土壤微生物及有机质周转研究副题名外文题名 Study on the microbial characteristics and the turnover of organic matter in paddy soil under a long-term no-tillage and ridge culture 论文作者张磊导师谢德体教授魏朝富研究员学科专业土壤学研究领域\研究方向土壤生物和生态学位级别博士学位授予单位西南农业大学学位授予日期2002 论文页码总数92页关键词稻田土壤生态学土壤有机质土壤微生物免耕馆藏号BSLW /2003 /S154 /1 免耕制是一种保护性耕作制，指同一块土壤在一定年限内，不仅免除播前耕作，也免除播后中耕，作物收获后直接将作物残茬留在土壤中的耕作方式。

The results provided basis for the application of mycorrhizal technology to bioremediation of mineral oil contaminated soil.

研究结果为矿物油污染土壤的菌根生物修复提供了理论指导和科学依据，为菌根技术在有机污染土壤生物修复中的应用提供了借鉴。

Soil ecological degradation can be defined as the process and phenomenon of a series of deterioration of soil ecological environment such as structural destruction and functional recession of soil ecosystem, decrease of soil biodiversity and productivity, dcsertification, drought, hardness, acidification and salination of soils, deficit and unbalance of soil nutrients, and loss of soil and water, resulting from human activities and adverse natural environmental conditions.

土壤生态退化是指由于人类活动及恶劣的自然环境条件作用或二者共同作用下造成的土壤生态系统结构破坏、系统功能衰退、土壤生物多样性减少、土壤生产力下降以及土壤荒漠化、干旱化、板结化、酸化、盐碱化和养分亏缺与失衡等一系列土壤生态环境恶化的过程和现象。

As shown in the experimental results: as the conductor of petroleum biological degradation, the quantity of microorganism is the important factor of petroleum degradation efficiency, the huge natural capacity of microorganism in soil is its foundation of bioremediation; petroleum density in certain scope do not affect for the degradation efficiency of petroleum, and in the density of 5%, its initial degradation efficiency is higher, however after training 40 days, this kind of advantage change weak gradually, the reason may be the petroleum of high density probably having certain poison role for microorganism; the best ecological condition of petroleum contaminated soil bioremediation is that nutrition material C: N = 60, electron receives body HiOi joining quantity amount to 12 mg/g, water content is 50%, surface activator is anion surface activator of 12 Wan base benzene sulphur sour sodium; the relation of primary and secondary of factor is water content, surface activator, nutrition material and electron receiver.

试验研究结果表明：作为石油生物降解的执行者，微生物的数量是影响石油降解效率的重要因素，土壤中微生物的巨大的自然容量是其生物修复的基础；石油浓度在一定范围内对石油的降解效率并没有影响，并且在5％浓度时，其起始降解效率较高，但是到了培养40天以后，这种优势渐渐变弱，可能还是高浓度的石油对微生物有一定的毒害作用；石油污染土壤生物修复的最佳生态条件为：营养物质C：N为60，电子受体H_2O_2的累计加入量为12mg/g，含水量为50％，表面活性剂为阴离子表面活性剂十二烷基苯磺酸钠；因素的主次关系为：含水量、表面活性剂、营养物质和电子受体。

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。