杉木人工林可变密度收获表的编制

On Drawing up the Variable-density Yield Table for Chinese Fir Plantation

利用Richards方程，建立以林分年龄、地位指数、林分密度指数为输入变量，林分总断面积、平均胸径为输出变量的生长模型，误差分析表明该模型适用．在此基础上，编制了杉木人工林可变密度收获表．

By using Richards equation.the growthmodel of Chinese fir plantation was built,while input variates tvers stand age, site indexes and stand desities. and output were totle basal area of stands and even diameters al breast height, error analysis showed that the model was fit. Based on it. foe variable-density yield table for Chinese fir Plantation was drown up.