同龄纯林密度效应新模型的研究

根据植物种群生物量增长模式和最终产量恒定理论，提出一种新的同龄纯林密度效应模型：V^-β=AN^β B。这里N和V分别为林分密度和平均单株材积；A、B、β分别是随生长阶段而变化的参数。采用杉木人工林密度试验材料进行验证，表明该模型能很好地拟合实际的观测资料，明显优于目前常用的密度效应倒数模型和二次效应模型，显示了较大的优越性和较高的准确性。在新的密度效应模型中，取β=1可得密度效应倒数模型，即密度效应倒数模型仅为本文新模型的一个特例。

The Study On The New Model Of Even-Aged Pure Forest Density Effect

Based on the theory of plant interpopulation biomass increase model and the lastest stable yield theory ,deduce the model of density effect model of even-aded pure forest : .There N and V represent separately forest density and average single tree's volume of timber ;A,B, are paramaters varied with growth period .We adopt Chinese fir growth permanent information to check. Super to the models used at present density effect reciprocal model and twice effect model. Display accuracy, applicability and using value.In the new model ,when = 1 it equal to density effect reciprocal model.So density effect reciprocal model is this new model' special case.