摘要
本文运用正态分布、β分布、Γ分布和Weibull分布4种概率密度函数研究了205块杉木人工林标准地的直径分布规律,分析了这4种概率分布的拟合效果,并探讨了不同年龄、不同地位指数对正态分布拟合率的影响,建立了正态分布参数的预估方程。由此可编制出林分直径分布预估表。
Four probability density functions, Normal Distribution , Beta Distribution, Gamma Distribution and Weibull Distribution , were applied to the study of diameter distribution of 205 sample plots. The fitting effects of four probability distribution were analysed. The effect of fitting acceptance rate of Normal Distribution at different age and site index was studied. The predication equation for the parameters of Normal Distribution from which the table of stand diameter distribution would be compiled has thus been esta blished.
出处
《福建林学院学报》
CSCD
1992年第4期399-405,共7页
Journal of Fujian College of Forestry
关键词
杉木
直径
分布
人工林
Chinese fir, diameter distribution, density function, normal distribution function
