Abstract: 6 years experiment on four thinning intensities of Cunninghamia lanceolata and Micheliameclurri mixed forest shows that in comparing with control, net growth of DBH for C.lanceofata and M.maclurei is respectively by 70-139% and 11-25%,height by 46-90 and 710%, volume by 54-140 and 10-43%, mean crown height by 26 and 8-13%, growing stock of the stand by 49-75m³.ha-1.The height of first living branch isdecreased by 0.5-3 and 35-48%,but crown width by 1-2% for C.lanceofata,and by 1-8% for M.maclurri.Therefore,it is considered that the thinning intensities of 30% and 40% are better than others,and the remainning trees are 1600-2200plant·ha^-1

Key words: Mixed stand, Thinning intensity, Increment, Cunninghamia lanceolata, Michelia maclurei, bio-organic fertilizer, microbial community functional diversity, enzyme activity