Abstract:Soil samples were collected from long-term metal-contaminated rice field in Dabao Shan area of Guangdong province, China. Soil physico-chemical properties, total contents and DTPA extractable fractions of Cu, Pb, Zn and Cd, and microbial biomass and organic carbon mineralization were investigated to analyze their relationships. Principal component analysis and stepwise regression were employed to characterize availability of heavy metals, microbial responses and their effect factors in the studied soil. The...