杉木人工林密度效应模型研究

本文提出能应用在不同立地条件,不同生长发育阶段的林木密度效应模型V=α·Nβ_1·Hβ_2,式中α、β_1、β_2为参数,V为单株材积,N为林分每0.06hm~2面积上的株数,H为林分优势木高度。应用闽北地区杉木人工林资料进行研究,其结果是满意。文中还对该模型进行生产弹性分析,边际产量分析,测定了杉木人工林分密度的生产弹性值和边际产量,它们可为森林经营活动提供科学依据。

Study of Density Effect Model for Chinese Fir Plantation

The paper gives the tree density effect model in the stand that can be used in different site conditions and growth stages. The model is described as V=a. Nβ1 . Hβ2, where a, β1, β2, are parameters, N is the number of tree in the stand and H is the height of dominant trees. Data collected from Chinese fir plantations in the north of Fujian province have been studied and the results are satisfactory. Furthermore,the analysis of productive elasticity and marginal yield have been made. And the paper also calculates the value of productive elasticity and marginal yield, which will provide the scientific basis for forest management.