林业科学2012，Vol.48Issue(4)：149-155,7.
不同间伐强度下辽东栎种群结构特征与空间分布格局
Effects of Thinning Intensity on Structure Characteristics and Spatial Distribution of Quercus wutaishanica Populations
摘要
Abstract
An investigation was conducted in pints of the Quercus wutaishanica forests in the Huanglong Mountain of China. The forests were undertaken the close-to-nature management thinning of 13.4% (light thinning) and 30.0% ( heavy thinning). An unthinned forest served as the control. The life table, age structure, survivorship curve and spatial distribution were studied in 6 years after the thinning. The results were as follows. 1) The age structure of the population exhibited that seedlings and saplings were predominated, while the young trees were the scarcest. 2) Population mortality rate was the highest in I - Ⅲ age class. With age increasing, the mortality displayed a "high-low-high" mode, while the expectancy life of populations displayed a " low-high-low" mode. 3) The survivorship curve of populations generally matched the Deevey Type Ⅲ . 4) With sampling dimension increasing, the spatial distribution transformed from clumped or random to clump distribution. 5) As the population grew older, their distribution transformed from the clumped into a random distribution while their clumped intensities reduced. 6) Compared with the control, the light and heavy thinning promoted the number of the juveniles and young trees, and population structure was optimized. Therefore, the secondary Q. wutaishanica forest reaches thinning period. Under natural circumstances, the highest clumped intensity at the 25 - 50 m2 was the optimal area for the population regeneration. The close-to-nature management thinning 30. 0% was more suitable to the management.关键词
辽东栎/近自然经营/龄级结构/静态生命表/存活曲线/空间布格局/间伐强度Key words
Quercus wutaishanica/ close-to-nature forest management/ age structure/ life table/ survivorship curve/ spatial distribution/ thinning intensity分类
农业科技引用本文复制引用
周建云,李荣,张文辉,何景峰..不同间伐强度下辽东栎种群结构特征与空间分布格局[J].林业科学,2012,48(4):149-155,7.基金项目
中国科学院战略性先导科技专项(XDA05050203-05) （XDA05050203-05）
陕西省自然基金重点项目(2009JZ005). （2009JZ005）
