火地塘林区不同径级华北落叶松结构参数研究  

Spatial Parameters of Larix principis-rupprechtii with Different Diameter Class at Huoditang Forest Region

作　　者：张岗岗[1] 王得祥[1] 刘文桢 张丛珊 吕迪[1] 

机构地区：[1]西北农林科技大学林学院,陕西杨陵712100 [2]甘肃省小陇山林业科学研究所,甘肃天水741022

出　　处：《西北林学院学报》2014年第6期180-185,共6页Journal of Northwest Forestry University

基　　金：林业公益性行业科研专项(201204504)

摘　　要：以秦岭南坡火地塘林区不同径级华北落叶松为研究对象,利用空间结构分析软件Winkelmass1.0计算所有调查林木的空间结构参数混交度、大小比数、角尺度,以探究不同径级华北落叶松二元分布特征。结果表明,小径木中处于相同混交等级下的大多数林木严重受压或呈随机分布,处于随机分布或混交良好的被压木组成的结构单元最常见。中径木中处于不同混交等级和优势程度组合的林木株数基本相等,处于随机分布的大多数林木具有相同混交等级或相同优势程度。大径木中相同混交等级的绝大多数林木明显处于优势且呈随机分布。为秦岭林区华北落叶松人工林结构优化提供依据。In order to provide scientific basis for the decision making of optimizing the spatial structure of Larix principis-rupprechtii plantations at Huoditang Forest Farm which is located on the south slope of the Qinling Mountains,characteristics of bivariate distribution of the plantation were investigated by using Winkelmass 1.0software to calculate the structural parameters,such as mingling degree,neighborhood comparison,and uniform angle index.The results showed that trees with small diameter that were in the same mingling class were suppressed seriously or randomly distributed,while suppressed trees with random distribution pattern or well mingling consisted of the most common structural unit.For the trees with medium diameter,the number of the plants that were in different mingling degrees was basically equal to those with dominant combination,while most trees with the same mingling class or dominance degree was randomly distributed.The large diameter trees in each mingling class were superior and randomly distributed in the most cases.

关 键 词：秦岭 华北落叶松 结构参数 二元分布 

分 类 号：S791.22[农业科学—林木遗传育种]