毛竹材用丰产林密度效应模型研究

Study on Density Effect Model for High Yield of Phyllostachys Heterocycla Var.Pubescens

应用毛竹材用丰产林234块标准地材料，研究出毛竹材用丰产林密度效应的数学模型W＝0.230518N^(0.967324)D^(2.060102),并对模型进行生产弹性和边际产量分析，结果表明：毛竹材用丰产林分密度总的生产弹性值大于1，说明该地区毛竹生产力还有望进一步提高，从边际产量分析结果，如增加密度，还可提高竹林产量．该研究为毛竹材用丰产林经营活动提供科学理论的依据．

In this paper,using the data collected from 234 plots of high yield Phyllostachys heterocycla var.pubescens the density effect model in the stand was established and described as W＝0.230518N^(0.967324)D^(2.060102).Where W is the weight of Phyllostachys heterocycla var.Pubescens,N is the number of same plant and D is the average diameter in the stand.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 Phyllostachys heterocycla var.pubescens mangement.