Stand Structure and Optimized Adjustment of Ecological Public Welfare Forest in Chenda State-owned Forest Farm of Fujian Province

Choose the ecological forest of Chenda state-owned forest farm in Jinsiwan Forest Park, Fujian Province to be the object of study. The goal of stand structure optimization and adjustment was extracted by analyzing stand species composition, diameter distribution, volume structure, spatial structure and integrating the concept of sustainable forest management and structured management. The main research showed that tree species and tree species diversity showing a lower state when the coefficient of species composition was less than 3, accumulation ratio of small, medium, and large diameter class was 1.4:3.2:5, turn out that small group accumulation was insufficient, forest structure showed not so ideal when the average angle scale was 0.550 and an average mingling degree of 0.505. The predict result showed an increasing of mingling degree and reducing on angle scale after the adjustment, the whole distribution pattern tends to random distribution and stand spatial structure get a large improvement.