应用氯仿熏蒸培养法测定不同肥力水平的土壤生物量-C和-N。
The chloroform fumigation-incubation method was used to measure the biomass-C and-N of soils with different fertility levels.
接种线虫对土壤有效p的提高不明显，而对土壤生物量P有显著的增加。
Soil available P was not affected by nematodes, while soil microbial biomass P increased obviously with the inoculation of nematodes.
结果表明，长期施用有机肥或化肥均能增加土壤生物量氮数量，尤以有机肥的作用明显。
Results showed that long term application of NPK fertilizers or manure could increase soil biomass-N, especially the effect of manure on biomass-N was obvious.
图4土壤生物因素(对照和灭活)及施肥因素(化肥和有机肥)对褐飞虱生物量的影响。
Fig. 4 Effects of soil biological factor (non-sterilized vs. sterilized) and fertilization management (chemical vs. organic fertilizer) on planthopper mass.
土壤微生物是维持土壤质量的重要组分，土壤生物学指标能敏感地反映土壤质量的变化，土壤微生物量是土壤质量评价的一个重要的生物学指标。
Soil microorganisms play an important part in maintaining soil quality. Soil microbial biomass represents the labile pool and can be used as a bio-indicator for evaluating soil quality.
土壤微生物是维持土壤质量的重要组分，土壤生物学指标能敏感地反映土壤质量的变化，土壤微生物量是土壤质量评价的一个重要的生物学指标。
Soil microorganisms play an important part in maintaining soil quality. Soil microbial biomass represents the labile pool and can be used as a bio-indicator for evaluating soil quality.
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