Soil corer was used to investigate the distribution of fine root and a traditional method of nylon litter bag to measure the decomposition in pure Cunninghamia lanceolata and Michelia macclurei var Sublanea ,and the mixed plantations.Nutrient returns of N,P,K,Ca and Mg in the above three plantations were estimated based on the decomposition experiment.The vertical distribution of live fine root for pure M.macclurei stand was the most superficial,the mixed stand was intermediate,pu...