Research progress of soil microbial biomass in China

Research progresses of soil microbial biomass during recent years were reviewed in this paper, including microbial biomass C, microbial N, microbial P. The necessity of soil microbial biomass C, microbial N and microbial P in the nutrient cycling was emphasized and the effects of planting, rotation, grazing, and fertilizer application on soil microbial biomass were discussed. Finally, this study proposed the key points of soil microbial biomass research in the future.