论文部分内容阅读
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。
In this paper, we propose a tree density effect model V = α · Nβ_1 · Hβ_2 that can be applied to different site conditions and different growth and development stages, where α, β_1 and β_2 are parameters, V is single plant volume, N is 0.06hm ~ 2 area of the number of trees, H stands for the dominant wood height. Application of Chinese fir plantation information in northern Fujian Province, the result is satisfactory. The paper also analyzes the production elasticity and marginal yield of the model, and determines the production elasticity and marginal product of the density of Cunninghamia lanceolata plantations, which can provide a scientific basis for forest management activities.