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根据固定标准地的调查材料，并对林分的密度指数、相对植距指标、生长空间指标进行分析表明：以带密度指数的扩展Richards生长函数为基础模型编制杉木人工林可变密度收获表效果最佳。
According to the survey data of the fixed standard field, the density index, relative spacing index and growth space index of forest stand were analyzed. The results showed that the variable density harvest table of Cunninghamia lanceolata plantation was compiled based on the extended Richards growth function with density index optimal.