| 不同密度落叶松人工林直径结构研究 |
| |
| 引用本文： | 王方,郑小贤,蒋桂娟.不同密度落叶松人工林直径结构研究[J].内蒙古林业调查设计,2011(5):9-11,15. |
| |
| 作者姓名： | 王方 郑小贤 蒋桂娟 |
| |
| 作者单位： | 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,北京,100083 |
| |
| 基金项目： | 国家十一五科技支撑课题(编号2006BAD03A0804;长白山天然林生态采伐和次生林结构调整及多目标经营技术专题 |
| |
| 摘 要： | 文章利用汪清林业局金钩岭林场落叶松人工林不同密度固定样地的长期观测数据,采用偏度、峰度、直径变动系数对林分直径结构动态变化规律进行了探讨,结果表明:①25a时偏度值随密度增加而增大,其后随着年龄增加,各样地的偏度值均逐渐减小,直径分布曲线右偏型逐渐减弱,期初密度大的样地偏度值变化明显;②随着年龄的增加,不同密度样地的峰度值逐渐减小,直径分布曲线逐渐变得平缓,期初密度大的样地尤其明显;③31a后,各样地直径变动系数稳定在0.36附近。
|
| 关 键 词： | 落叶松人工林 直径结构 动态变化 密度 |
The research on the diameter structure of plantation of Korean Larch with different density |
| |
| Institution: | WANG Fang, ZHENG Xiao - xian, JIANG Gui - juan (The Key Laboratory for Silviculture and Conservation of the Ministry of Education, Beijing Forestry University, Beijing 100083, Chnia ) |
| |
| Abstract: | Long - term observation data about larch which is from Jingouling wood farm, Wangqing for- estry bureaus was used in this paper. Skewness, kurtosis and coefficient of variation were adopted to analyzing the dynamics of the diameter structure of the forests with different density. The results indicated：（1）The skewness of the distribution curve of the diameters increased as the forests＂ density went up the they were at the age of 25a. And as the age increased, the skewness of the distribution curve of the diameters decreased, right - skewed degree of the distribution curve diminished gradually. The skewness of the sample plot with lager initial density changed apparently. （2）As the age grew, the kurtosis of the sample plots diminished gradually, and the distribution curves dropped off. The change was very apparent in the sample plots with bigger initial density. （3） The coefficient of variations of the sample plots stabilized near 0.36 when the age arrived 31 a. |
| |
| Keywords: | Korean Larch diameter structure dynamics density |
| 本文献已被 维普 万方数据 等数据库收录！ |
|
