摘要
基于江西省抚州市东乡区雷竹林立竹胸径的调查数据,应用正态分布函数、Weibull分布函数、Gama分布函数拟合雷竹林林分直径分布规律,并用卡方检验拟合优度,为该地区雷竹林的可持续经营提供理论依据。结果表明:研究区雷竹林林分直径分布呈单峰曲线,均符合正态分布、Weibull分布和Gama分布,雷竹林平均胸径在3.2~3.7 cm,整齐度在4.5~5.2,林分直径分布特征表现为正态分布偏左。该地区雷竹林胸径结构不合理,小径雷竹较多,应适当减少小径级雷竹占比,增加中间径阶雷竹占比,使其达到合理的胸径结构。
Based on the survey data of breast-height diameter of Phyllostachys praecox forest in Dongxiang District,Fuzhou City,Jiangxi Province,the Normal distribution function,Weibull distribution function and Gama distribution function were used to fit the law of stand diameter distribution of P.praecox forest,and the Chi-square was used to test the goodness of fit function,and it provieded theoretical basis for sustaianable management of P.praecox forest in this area.The results showed that the stand diameter distribution in the study area presented a unimodal curve,which was consistent with the Normal distribution,Weibull distribution and Gama distribution.The average breast-height diameter was 3.2~3.7 cm,and the uniformity was 4.5~5.2.The stand diameter distribution was characterized by the Normal distribution to the left.In this area,the breast-height diameter structure of P.praecox forest is not reasonable,and there are many lower breast-height diameter bamboo,so the proportion of lower breast-height diameter bamboo should be reduced appropriately and the middle should be increased to achieve a reasonable breast-height diameter structure.
作者
黄思远
余林
曾庆南
况小宝
Huang Siyuan;Yu Lin;Zeng Qingnan;Kuang Xiaobao(Jiangxi Academy of Forestry,Nanchang Jiangxi 330013,China)
出处
《南方林业科学》
2020年第5期49-51,56,共4页
South China Forestry Science
基金
江西省重点研发计划项目(项目编号:20192BBFL60013)
江西省林业科学院重点研发项目(项目编号:2019510901)。
关键词
雷竹林
林分直径分布
卡方检验
正态分布
WEIBULL分布
Gama分布
Phyllostachys praecox forest
stand diameter distribution
Chi-square test
Normal distribution
Weibull distribution
Gama distribution
