Study on the Stand Diameter Distribution Model of the Natural Secondary Forests in the Mountainous Areas of Eastern Liaoning

Abstract

Abstract: Some characters of the diameters of number of stem distributions of secondary forest in mountains of eastern Liaoning were studied by using indices of skewness,kurtosis and coefficient of variation.The stand diameter of number of stem and basal area distributions in the secondary forest were simulated by four probability density functions:Johnson's SB,Gamma,two- and three-parameter Weibull distribution.The four distribution functions were tested through Kolmogorov-Smirnov(KS)test.The results showed that the Effects of Thinning of the stand diameter of number of stem distribution,and Johnson's SB distribution fit best;Weibull distribution(including the two- and three-parameters)is only suitable for Plot 3 and Plot 2,but not the best .All the distribution models have passed the test of goodness of fit,which are applicable to the model fitting.

Key words: thinning, Johnson's SB distribution, Weibull distribution, Gamma distribution, moutains of eastern Liaoning, secondary forest, diameter distribution

CLC Number:

S711
S753.7

DING Guoquan, XU Jizhong. Study on the Stand Diameter Distribution Model of the Natural Secondary Forests in the Mountainous Areas of Eastern Liaoning[J]. FOREST RESOURCES WANAGEMENT, 2012, 0(5): 94-97.

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