长白山杨桦次生林直径结构研究  

Diameter Structure of Polar-Birch Secondary Forests in Changbai Mountain

作　　者：龚直文[1] 亢新刚[1] 杨华[1] 顾丽[1] 赵浩彦[1] 

机构地区：[1]北京林业大学省部共建森林培育与保护教育部重点实验室,林学院,北京100083

出　　处：《西北林学院学报》2009年第3期1-6,共6页Journal of Northwest Forestry University

基　　金：国家自然科学基金(30671667);国家“十一五”科技支撑课题(2006BAD03A08)

摘　　要：以长白山金沟岭林场杨桦次生林为研究对象，分析了杨桦次生林直径分布特征，通过Weibull分布函数和负指数分布函数2种直径分布模型的模拟和检验，表明两者都适宜于异龄次生林的直径分布模拟；计算了次生异龄林中连续2个径阶中的株数之比（常数q值），分布范围为1．26～1．49。Permanent plots in the polar-birch secondary forests in Changbai Mountain, northeastern China, were established, and Weibull function and Negative exponential diameter distribution function, based on observation data of these plots, were developed to model diameter frequency distributions. Results showed that Weibull function and negative exponential function were suitable models for modeling uneven-aged secondary forests. And the study calculates the diameter q value, which was between 1.26-1.49.

关 键 词：林分结构 直径分布 q值法则 WEIBULL分布 负指数分布 杨桦林 次生林 

分 类 号：S711[农业科学—林学]