使用Weibull函数对树高分布和直径分布的研究

使用Weibull函数拟合天然兴安落叶松林分直径分布和树高分布,根据X~2—检验结果表明,拟合效果良好。文中提出,如果H=αD~β关系成立,林分直径分布遵从Weibull分布时,其林分树高分布也遵从Weibull分布。并利用六块全林测高标准地资料,验证了这一理论。提出由Weibull直径分布参数推断Weibull树高分布参数的方法

A Study of the Relation Between D and H- Distributions by Using the Weibull Function

In this paper, the three-parameter Weibull function was used to fit the diameter (D) distribution and height(H)-distribution in natural stands of Larix gmelinii (Rupr.)Ledeb. et Gord. As shown by the X2-test, for goodness of fit the three-parameter Weibull function is satisfactory for fitting the D and H-distributions. In this paper, if H=αDβ, then the D-distribution follows the Weibull distribution, and the H-distribution must also follow the Weibull distribution. The data of 6 plots, in which the height was measured one by one, were used to test this theory. However, the parameters in the H-distribution can also be inferred from the parameters in the D-distribution.