2007•T'u Jang T'ung PaoRequires access

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

Zhu Feng-chun

Abstract

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.

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Key concepts: Biomass (ecology), Soil fertility, Agronomy, Fertilizer, Human fertilization, Soil carbon, Total organic carbon, Nitrogen