南渡江流域木麻黄人工林林分结构研究  

Study on Structure of Casuarina equisetifolia Plantation Stands in the Nandu River Basin

作　　者：吴疆[1,2] 李向阳 佘济云[1,2] 陆禹[1,2] 孟伟 魏甫[3] 

机构地区：[1]中南林业科技大学,长沙410004 [2]中南林业科技大学湖南绿色发展研究院,长沙410004 [3]国家林业局中南林业调查规划设计院,长沙410004

出　　处：《林业资源管理》2013年第4期27-32,共6页Forest Resources Management

基　　金：海南省林业局重点科研项目"海南省五大河流域植被恢复与保护规划研究"(LK20118478);湖南省"十一五"重点学科建设计划资助项目"森林经理学科"(2006-028-0015);中南林业科技大学研究生科技创新基金资助项目(CX2012B14);湖南省研究生科研创新项目(CX2012B323)

摘　　要：以海南南渡江流域木麻黄人工林为研究对象，分析木麻黄人工林林分结构的特点及规律。运用weibull分布函数和正态分布函数进行直径、树高拟合，并结合X2检验方法对拟合结果进行检验，结果表明：木麻黄人工林中、小径阶的林木数量居多，林分平均胸径为11．6cm，在3．4～21．3cm变动，林分平均树高为13．6m，在5．2～23．5m变动；2种分布函数对木麻黄人工林的拟合效果均可，且Weibull分布函数的拟合精度略优于正态分布；木麻黄人工林林下植被组成简单，多样性较低，且草本层生长较灌木层茂盛。This paper analyzed the characteristics and rules of the Casuarina equisetifolia plantation stands structure in the Nandu River basin in Hainan Province, used Weibull distribution and normal distribution in diameter and height fitting and was combined with X^2 fitting results for examination. The results showed that the average DBH of Casuarina equisetifolia plantation stands was 11.6cm,the span of diameter class ranked 3.4 to 21.3cm, the average of tree height was 13.6 and ranked 5.2～ 23.5m ;fitting results of two distribution functions showed high fitting accuracy, and the fitting precision of the Weihull distribution were slightly better than the Normal distribution; undergrowth vegetation composition in Casuarina equisetifolia plantation stands was simple with low biodiversity, and the growth in herbaceous layer was more vigorous than shrub layer.

关 键 词：木麻黄 林分结构 WEIBULL分布 正态分布 物种多样性 

分 类 号：S718.5[农业科学—林学]