土壤微生物

5The activities of microbes were restrained by acid rain. The number of microorganism in No.

三门江林地土壤微生物的数量均比长塘样地高，在微生物活动旺盛的春季，还高出一个数量级。

PICT, used as an indicator for the determination of toxic effects of pollutants in biotic communities, has been developed for aquatic and terrestrial communities.

目前PICT研究已涵盖了水生生物、陆地植物、微生物等，其中土壤微生物是PICT研究的重要群落对象。

The results shows that the number of rhizosphere soil microbes in fixeddune and semifixed dune are aerophile bacteria）actinomyces） fungi.

研究了鄂尔多斯4种典型固沙植物柠条、沙柳、杨柴、油蒿在固定沙丘和半固定沙丘两种立地条件下根际土壤微生物数量、组成的季相变化，结果表明固定沙丘和半固定沙丘根际微生物数量为好气性细菌〉放线菌〉真菌。

Culturable heavy metal-tolerant bacteria in 5～10 cm and 25～30 cm layers of three lead-zinc tailings,deposited for about 10,20 and 80 years respectively,were investigated.

重金属毒性往往对土壤微生物的生物量、代谢活力产生不利影响[1] ，导致微生物区系组成的改变和生物多样性的减少[2 ] 。

The reduce of edaphon carbon source and nitrogen source after planting konjac would lead to decrease of number of total microbial community.

结论］种植魔芋后土壤微生物碳源和氮源数量减少，造成微生物总数量下降。

The number of mold, bacteria, culturable microorganisms, aerobic nitrogen-fixing bacteria, anaerobic nitrogen-fixing bacteria, aerobic cellulose decomposition microbes, anaerobic cellulose decomposition microbes were the most in 16-year-old organic tea garden, and the biomass carbon and nitrification of edaphon were also the strongest.

霉菌、细菌、可培养微生物总量、好气性自生固氮菌、嫌气性自生固氮菌、好气性纤维分解菌、嫌气性纤维分解菌均以16年生茶园最多，土壤微生物生物量碳和硝化作用也以16年生茶园最强。

Therefore, the decrease of microbial diversity index with age was one reason why the quality of H. lupulus decreased.

随啤酒花植龄的延长，土壤微生物数量的变化，特别是微生物多样性指数的减少，可能是啤酒花品质下降的原因之一。

6Moreover measures to control acid rain by liming in polluted area to neutralize resulted in reducing averagely 0.13 pH of soil, and the element content in soil had been improved gradually. The number of microbes had been increased in the No.2, No.3 and No.4 plots in polluted area. The quantity of bacteria had sored to 8.0×109per kilogram soil and N2-fixing bacteria also get 2.5×107per kilogram soil in Spring.

其中最理想的施石灰量为20-30Kg／100m~2，施石灰可中和土壤酸性，pH平均升高0.13，使土壤有机质、有效P、K等增加，并使林下土壤微生物数量增多；在春季，细菌数量达到8.0×10~9个／Kg干土，固氮菌达2.5×10~7个／Kg干土，从而促进了林分生长。

Microbial biomass carbon and microbial biomass nitrogen, respiration CO2 and mineralized nitrogen in plant straw fertilized soil were determined under laboratory incubation conditions of constant temperature and moisture based on field above- ground yields of intercropped sweet maize straw and white clover straw.

根据田间甜玉米／白三叶草套种各作物的秸秆产量，在恒温恒湿条件下进行室内培养，探讨秸秆不同方式还田后土壤微生物量碳、微生物量氮、呼吸产生的CO2和矿化产生的无机氮的变化规律。

It is necessary that the study on reason and process of degraded hillslope soil forming. The swidden system and plantation system are the two main using types in the a...

说明山地的退化严重影响着土壤微生物的生长代谢水平以及它们之间的协同作用，从而影响土壤碳氮循环代谢途径，降低土壤肥力水平。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。