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以应用正交试验设计方法对不同林龄、不同立地条件和不同林分密度下人工杉木林木材物理力学性质变异规律的研究为基础，采用多元线性回归方法，建立了用林龄、林分密度、地位指数 ３ 因子预测杉木短轮伐期工业林木材物理力学性质指标的一系列回归方程，并经回归显著性检验，这些方程的复相关关系均显著
Based on the study of the laws of variation of physical and mechanical properties of Artificial Chinese fir plantations under different stands, different site conditions and different stand densities using orthogonal experimental design method, , The index of status index 3 predict the physical and mechanical properties of wood in the short rotation of Chinese fir plantation by a series of regression equations and the regression significance test, the complex correlation between these equations were significant