滇东北黄杉种群数量动态的初步研究  

A Preliminary Study of Population Dymamics of Pseudotsuga sinensis Population in Northeastern Yunnan

作　　者：孟广涛[1] 柴勇[1] 方向京[1] 杨卫[1] 武力[1] 方波[1] 

机构地区：[1]云南省林业科学院,云南昆明650204

出　　处：《西北林学院学报》2008年第6期54-59,共6页Journal of Northwest Forestry University

基　　金：中荷合作云南省森林保护与社区发展项目;国家"十一五"科技支撑计划项目(2006BAD03A10-03)

摘　　要：用生存分析和静态生命表研究方法,在滇东北调查了12个样地(20 m×20 m),分析了不同人为干扰条件下黄杉(Pseudotsuga sinensis)种群数量动态和年龄结构.结果表明:不同人为干扰条件下,黄杉种群目前均处于中、幼林阶段,种群年龄结构表现为增长型,但增长性和稳定性存在差异.死亡率曲线均呈现2个峰值,但峰值出现的时间格局亦存在差异.种群存活曲线接近De-evey-Ⅲ型,1～5龄级曲线较陡,死亡率较高;5龄级以后存活曲线相对平缓,死亡率较低.生存函数曲线反映了黄杉种群具有幼苗、幼树阶段死亡率高,中树阶段死亡率渐低,至大树阶段趋于稳定的特点.大量的人为砍伐是目前黄杉资源数量下降的主要原因,应严厉禁止.12 plots(20 m×20 m) were sampled to investigat the population number dynamics and age structure of Pseudotsuga sinensis population under different disturbances by means survival data analysis and static life table in northeastern Yunan.The results indicated that P.sinensis populations under different disturbances were all in stably young and middle ages and their age structures were increasing types,but their growths and stabilities had significant differences under different human disturbances.The mortality rate curves exhibited two peaks with different intensities and time.The survival curves of the populations appeared to be of the Deevey-Ⅲ type,the survival curve in 1~5 age calsses were steep with high death rates while the survival curves after 5 age class were even with low death rates.P.sinensis population under different human disturbances had high death rate in young age,decrescent death rate in middle age and stable death rate in mature age.Massive logging was the main reason for the recent decline in P.sinensis population and should be forbidden strictly.

关 键 词：黄杉 生命表 存活曲线 种群动态 

分 类 号：S791.49[农业科学—林木遗传育种]