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利用闽北地区１９８８年和１９９３年两次森林资源连续清查４８７块异龄林固定样地资料，运用主分量分析和回归正交设计方法分别选出异龄林地位主导因子和建立地位质量指数模型，在此基础上，建立了包含地位质量指数因子的异龄林生长矩阵模型．
Using 487 fixed-site data of different age forests in two successive forest resources in northern Fujian in 1988 and 1993, principal dominant factor and status quality index model were selected by principal component analysis and regression orthogonal design respectively , On this basis, established a growth matrix model of heterogeneous forest containing status index of quality index.