摘要
以宝天曼天然次生林32块样地的调查数据为依据,分别以正态分布、对数正态分布,Weibull分布,Beta分布,Gamma分布拟合及预测宝天曼自然保护区天然次生林10种主要乔木树种直径分布,并对其适用性进行分析、比较,选出最适合于拟合及预测该林分直径结构的分布.同时应用三种直径分布特征数对直径分布规律进行分析.结果表明:Beta分布与Weibull分布均可以较好地描述宝天曼天然次生林主要乔木树种的直径分布;大多数树种偏度为偏左,峰度值为正.
The main purpose of the thesis is choosing the more superior distribution among normal distribution, logarithmic normal distribution, weibull distribution, beta distribution and gamma distribution when they are used for fitting and forecasting ten main trees diameter distribution of natural secondary forest in baotianman on basis of analyzing and comparing the data from the 32 plots of natural secondary forest in baotianman. The test analyzes the diameter distribution laws with three characteristics of diameter distribution. The results show：the more superior distributions used for describing main trees diameter distribution of natural secondary forest in Baotianman are Weibull distribution and Beta distribution. Big parts of skews are positive and crests are positive.
出处
《河南科学》
2006年第3期364-367,共4页
Henan Science
基金
河南省科技攻关项目(991200130)
关键词
天然次生林
直径分布
宝天曼
natural secondary forest
diameter distribution
Baotianman
