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本文采用改进单纯形法拟合了福建省中心产区杉木人工林8参数Richards多形地位指数曲线模型．精度验证的结果表明，所拟合的模型符合精度要求．对不同地位指数优势高生长特性进行了分析，结果表明：地位指数越高，则林分优势高速生期来得越早，生长潜力也越大．
In this paper, an improved simplex method was used to fit the Richards polymorphic index curve model of Cunninghamia lanceolata plantation in the center of Fujian Province. The results of accuracy verification show that the fitted model meets the accuracy requirements. The results showed that the higher the status index, the earlier the stand speed of high stand speed came and the greater the growth potential would be.