西南林业大学学报2012，Vol.32Issue(2)：49-52,83,5.DOI:10.3969/j.issn.2095-1914.2012.02.010
思茅松天然林林分直径结构动态变化
Studies on Dynamics of Diameter Structure of Pinus kesiya var.langbianensis Natural Stands
姚能昌 1段爱国 2唐军荣3
作者信息
- 1. 云南省林业调查规划院,云南昆明 650051
- 2. 西南林业大学国家林业局西南地区生物多样性保育重点实验室,云南昆明 650224
- 3. 中国林业科学研究院林业研究所国家林业局林木培育重点实验室,北京100091
- 折叠
摘要
Abstract
The dynamics of the diameter structure of Pinus kesiya var. langbianensis natural stands and the density effect of the stands were studied with the criteria including skewness, kurtosis, diameter variance coefficient, cumulative diameter distribution curves and frequency distribution based on the data from five periodical forest resource survey on P. kesiya var. langbianensis in Yunnan Province. The results showed that in the 10 -70 a age classes, the skew value of the stands changed gradually from positive to negative, the absolute value of the skew index changed from small to bigger, and the stands with high density had bigger skew value. The value of kurtosis showed the downtrend with the increase of stand age. The kurtosis value of the stand diameter distribution increased as the stand density increased. No matter how the stand density changed, the value of kurtosis all tended to 0 at last. The study showed that the diameter variance coefficient generally decreased along with the increment of stand age, and it was not obviously influenced by stand density. At any range of cumulative frequency distribution, the smaller the density was, the bigger the middle value of diameter class was. The size-class distribution directly testified these conclusions.关键词
思茅松/天然林/直径结构/密度Key words
Pinus kesiya var. langbianensis/ natural stands/ diameter structure,/ density分类
农业科技引用本文复制引用
姚能昌,段爱国,唐军荣..思茅松天然林林分直径结构动态变化[J].西南林业大学学报,2012,32(2):49-52,83,5.
