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Soil microbial biomass nitrogen and its role in nitrogen cycling

QIU Shaojun1,2;PENG Peiqin1,2;LIU Qiang1;RONG Xiangmin1   

  1. 1College of Resource and Environment,Hunan Agricultural University,Changsha 410128, China; 2The Key Laboratory of Subtropical Agro-ecology,Institute of Subtropical Agriculture,Chinese Academy of Sciences,Changsha 410125， China

  • Received:2005-06-26 Revised:2005-10-10 Online:2006-04-10 Published:2006-04-10

Abstract: The content of soil microbial biomass nitrogen (BN) and its affecting factors were reviewed,the important roles of soil microbial biomass nitrogen in soil nitrogen cycling were described,and the relationships of soil microbial biomass nitrogen with soil mineralizable nitrogen,mineral nitrogen,organic nitrogen and fixed ammonium were emphatically discussed in this paper.It was indicated that soil microbial biomass nitrogen had a close relationship with the nitrogen-supplying capability of soil,and played an important role in controlling soil nitrogen supply,decreasing soil nitrogen loss,and increasing the efficiency of applied fertilizer nitrogen.The further research items in soil microbial biomass nitrogen were also put forward in this paper.

Key words: Fugu rubripes, Microecology, Fermentation products, Tetrodotoxin