Abstract:Study of influence of intensive agriculture on soil microbial community is one of the modern frontiers of soil quality research. Soil microbial diversity has been shown as a definite indicator of appreciable soil quality and sustainable primary production in organic farming (Mader,et al,2002). Paddy soils are generally considered as a unique anthropogenic type of soils in China that have been subject to intensive farming with high input managements for the last decades. However, there has been poor knowl...