期刊论文

中文

中南林业科技大学学报

1673-923X

2014

34

7

61-66

10.14067/j.cnki.1673-923x.2014.07.014

国家“十二五”科技支撑计划项目（2012BAD22B0505） 湖南省教育厅项目（12C0440）

本校为第一机构

以福寿林场杉木人工林为研究对象,利用正态分布、Weibull分布、对数正态分布、Gamma分布4种分布函数分别对3个林龄9块样地的直径分布进行了拟合研究。结果表明:偏度系数均为正值,直径分布偏向中小径阶,6年生杉木偏度最大,13年生偏度最小。峰度系数6年生杉木均为正值,直径分布较集中,13年生、20年生杉木大都为负值,直径分布较离散。6年生杉木用对数正态分布和Gamma分布拟合效果好,13年生杉木用Weibull分布拟合效果好,20年生杉木拟合效果均不理想。

By taking Cunninghamia lanceolata artificial forests in Fushou forest farm as the tested objects, the diameter distributions of C. lanceolata artificial forests from 9 sampling plots with three stand age were investigated and fitted based on 4 distribution functions（normal distribution, Weibull distribution, lognormal distribution, Gamma distribution）. The results indicate that the coefficients of skewness were positive values, in other words, the numbers of medium and small diameter class were more than that of the large, the coefficient of ...