青石冈林场木荷直径结构研究  

Study on Diameter Structure of Schima superba in Qingshigang Forest Farm

作　　者：孟伟[1] 陈彩虹[1] 胡焕香[1] 吴疆[1] 陆禹[1] 丁思一[1] 

机构地区：[1]中南林业科技大学,长沙410004

出　　处：《林业资源管理》2013年第2期89-93,共5页Forest Resources Management

基　　金：国家林业局行业公益性项目"南方集体林区次生林抚育间伐与高效利用技术研究"(201004032);湖南省"十二五"重点学科-森林经理学科资助项目(034-0014)

摘　　要：以湖南青石冈林场木荷人工林为研究对象,分析了木荷直径结构规律。运用威布尔分布(Weibull)、正态分布、对数正态分布和伽马(Gamma)分布进行直径拟合,并结合X2对拟合结果进行检验,结果表明:木荷林分平均胸径为10.4cm,在5.1～37.1cm之间变动,全距32.0cm,径阶分布范围不大;小径阶的林木数量居多(6～12cm),累计百分比已达到83.7%;4种分布函数中,威布尔分布拟合效果最好,其次是对数正态分布,但两者的差异不大,均可用于预测木荷林直径结构。An analysis was made on the law of the Schima superba diameter structure in Hunan Qingsh- igang Forest Farm. The Weibull distribution, Normal distribution, Log-normal distribution and Gamma distribution were used for fitting stand diameter distribution and combined with χ2 fitting result for ex- amination. The results showed that the Sehima superba forest average DBH was 10. 4cm,the span of di- ameter class ranked 5. 1 to 37. lcm in the range 32. 0cm,which mainly were small diameter class（6 12cm） ,the accumulating percentage was 83.7%. Among the whole distribution functions, the Weibull distribution fitting effect is best ,followed by the Log-normal distribution, but the difference between the two distributions was similar, all of them can be used to predict Schima superba diameter structure.

关 键 词：直径结构 木荷 威布尔分布 对数正态分布 伽马分布 正态分布 

分 类 号：S758.1[农业科学—森林经理学]