【摘要】 试验研究不同农田生态系统土壤微生物生物量碳的变化结果表明,长期单施N、P肥处理对土壤有机碳和微生物生物量碳的影响不明显,施有机肥处理土壤微生物生物量碳及微生物生物量碳/有机碳值均高于其他施肥处理,轮作中引入豆科作物或豆科连作均对土壤微生物生物量碳的积累有显著作用。更多还原

【Abstract】 The changes of soil microbial biomass carbon in different agroecosystems are studied.The results show that the effect of long-term fertilization of individual N,P is not significant,but the fertilization of manure can enhance the soil(biomass) carbon and the rate of biomass carbon/organic carbon.At the same time,leguminous can increase the content of biomass carbon in the course of crop rotation in aridland.更多还原