土壤生物量氮
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土壤微生物量氮 soil microbial biomass
土壤微生物生物量氮 Soil Microbial Biomass ; Soil microbial biomass nitrogen
Soil biomass nitrogen
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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.
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