威布尔(Weibull)分布在洮河林区复层异龄林直径结构中的应用

The Application of the Wer11 Distribution to Multi—layer Uneven—aged Spre and Fir Stands in Taohe,Gansu

威布尔(Weibull)分布在同龄纯林的直径分布中已得到广泛的应用,但是在复层混交异龄林中应用的研究报道甚少。为了研究它的分布规律,选用了洮河林区三块云,冷杉异龄林标准地资料,用威布尔分布进行拟合试验。经研究证明,威布尔分布不但适用于同龄纯林直径分布,而且亦适用于复层异龄林直径分布。用威布尔分布拟合直径分布规律,是合理制定森林经营措施的理论依据。

The Weibull Distribution has been widely applied in diameter distribution of pure forest,but very few studies have been reported in mui layer forest with different ages.In order to go further into the distribution law,the Fitting Test was carried out on the three plots in spruce and fir forest.The result showed that the Welbull Distribution was not only suited to diameter distribution of the even-aged pure forest, but also to the multi.layer foresee with different agae.So, a reasonable forest management project may be draw up based on the Welbull Distribution.