天然次生林林分直径分布的研究  

Diameter distribution of natural secondary forest

作　　者：王文明 刘红润 

机构地区：[1]永吉县双河镇林场,吉林永吉132202 [2]黑河市爱辉区林业局,黑龙江黑河164300

出　　处：《科技致富向导》2011年第21期220-221,共2页Guide of Sci-tech Magazine

摘　　要：本研究基于帽儿山实验林场和穆棱林业局的119块天然次生林标准地调查数据。运用SB分布、指数分布、正态分布、Weibull分布和β分布函数对其进行拟合,分析林分直径分布规律,采用矩解法求解参数,更精确地比较各种分布函数对实际数据的拟合效果。研究结果表明：指数分布和Weibull分布的拟合效果较好,指数分布优于Weibull分布;指数分布函数的参数a基本不变,参数b变化,参数b与林分平均直径有显著的相关性。This study is based cap and children Muling Forest Mountain Experimental Forest Farm of 119 natural secondary standards to survey data.The use of SB distribution,exponential distribution,normal distribution,Weibull distribution and its fitting β distribution function analysis stand diameter distribution,the use of moment method to solve parameter,a more accurate comparison of different distribution functions fit the actual data effect.The results show that:exponential distribution and Weibull distribution was well fitted exponential distribution better than the Weibull distribution;exponential distribution function of the parameters of a basically unchanged,the parameter b changes,the parameter b and the stand average diameter of a significant correlation.

关 键 词：天然次生林 分布函数 平均直径 拟合效果 

分 类 号：S791.248[农业科学—林木遗传育种]