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本文根据江西永新县31块杉木人工林林分生长过程解析标准地资料．分析了立木株数随林分平均直径的变化规律。通过林数标准化，将合标准地林分蓄积量转换到标准林分（郁闭度1．0）水平，采用改进的8参数Chapman－Richards函数，用Marquardt迭代法建立了以地位指数和年龄为解释变量的杉木人工林多形标准蓄积量收获模型，为立地质量评价和森林资源的生长预测提供依据。
According to the standard data of the growth of 31 Chinese fir plantations in Yongxin County, Jiangxi Province. The variation of stand number with the mean diameter of forest was analyzed. Through the standardization of forest number, the converted stand volume was converted to the standard stands (canopy density 1.0). By using the improved 8-parameter Chapman-Richards function, Explain the polymorphic standard stock volume harvest model of Cunninghamia lanceolata plantation, which provides the basis for site quality evaluation and forest resource growth prediction.