土壤微生物量碳氮作为土壤肥力指标的探讨  

Microbial Biomass Carbon and Nitrogen as an Indicator for Evaluation of Soil Fertility

作　　者：薛菁芳[1] 高艳梅[2] 汪景宽[1] 付时丰[1] 祝凤春[1] 

机构地区：[1]沈阳农业大学土地与环境学院,辽宁沈阳110161 [2]南京农业大学资源与环境学院,江苏南京210095

出　　处：《土壤通报》2007年第2期247-250,共4页Chinese Journal of Soil Science

基　　金：国家重点基础研究发展(973)规划项目(2005CB121108)资助

摘　　要：通过对不同肥力水平黑土、棕壤、黄棕壤、红壤土壤微生物量碳氮的比较,研究和探讨土壤微生物量碳氮与土壤肥力的关系。结果表明:有机肥或无机肥施入土壤均能增加土壤微生物量C、N的含量,且有机肥与无机肥配合有显著的正交互作用。土壤微生物量C、N从北到南的地带性变化规律不强。BC/BN及TC/TN从北到南逐渐减小,BC/TC及BN/TN从北到南逐渐增加。相关分析结果表明:土壤微生物量C、N与全C、全N均呈极显著相关,可以作为指示土壤肥力的重要指标。To find out the relationship between soil microbial biomass C and N and soil fertility, soil microbial biomass C and N were compared in several types of soil with different fertilization levels. The results were as follows： both organic and inorganic fertilization increased the amount of soil microbial biomass C and N and chemical fertilizer and organic fertilizer combination had obviously positive interaction. The zone change of soil microbial biomass C and N from north to south was not distinct. MBC/MBN and TC/TN from north to south gradually decreased, but MBC/TC and MBN/TN from north to south gradually increased. The results of correlation analysis showed that soil microbial biomass C and N correlated with soil total organic C and N significantly. Hence, microbial biomass C and N could be considered as an indicator for soil fertility assessment.

关 键 词：微生物量碳氮 土壤肥力 指标 

分 类 号：S158[农业科学—土壤学]