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利用非线性函数的线性化方法,使传统的天然林直径分布的反“J”型曲线转化为直线形式,并探讨了直线参数变化的直观表现。通过对长白山天然林123个固定试验地林分直径分布的线性拟合,平均相关系数为0.98,表明天然林的直径分布线性化表达是可行的。可利用参数设计择伐株数和预估采伐前后的直径分布。参数在天然林择伐作业设计中可操作性强,研究结果可以为天然林经营,特别是为择伐作业提供依据。
By using the linearization method of nonlinear function, the inverse “J” -type curve of the traditional natural forest diameter distribution is transformed into a straight line form, and the visual representation of the variation of the straight line parameter is discussed. Through the linear fitting of the diameter distribution of 123 fixed sites in natural forests of Changbai Mountain, the average correlation coefficient was 0.98, indicating that the linear distribution of diameter distribution of natural forests is feasible. Parameters can be used to design the number of selective cutting and estimating the diameter distribution before and after harvesting. The parameters are operable in the design of selective cutting of natural forests, and the research results can provide the basis for natural forest management, especially for selective cutting operations.