川西高山林区人工林生态学研究——种群结构  

Studies on Population Ecology of the Plantation in Alpine Forest Regions of Western Sichuan:Population Structures

作　　者：刘兴良[1] 汪明[2] 宿以明[1] 何飞[1] 马钦彦[3] 梁罕超[1] 杨玉坡[1] 鄢武先[1] 

机构地区：[1]四川省林业科学研究院,四川成都610081 [2]四川省阿坝州理县林业局,四川理县624000 [3]北京林业大学资源与环境学院,北京100083

出　　处：《四川林业科技》2003年第3期1-9,共9页Journal of Sichuan Forestry Science and Technology

基　　金：四川省杰出青年学科带头人培养基金项目(No2001026);国家林业局"十五"重点项目(No200010);国家"十五"攻关项目子专题(No.2001BA510B060101)资助。

摘　　要：采用标准地调查方法及种群结构分析法,对川西云杉人工林种群的表现结构、立木蓄积结构、生物量结构进行分析表明:(1)高密度种群高度集中分布在4～8高度级,约占77%,中密度种群高度集中分布在6～10高度级,约占82%;(2)株数按径阶分布的峰值出现在低于平均直径的6cm径阶(5 0～6 9cm之间),然后两侧株数逐渐减少,呈左偏截尾正态分布;(3)总蓄积量按径级分布以10cm和12cm径阶林木蓄积量最大,分别占总蓄积的19 0%和18 80%;(4)株数总生物量和器官生物量随径级变化基本呈正态分布,而径级生物量最大出现在林木株数最多的12径级,生物量占总生物量的28 0%,低于平均直径的2～8径级生物量仅有13 719T/hm2,仅占总生物量的12 7%。With sample treeplot field investigation method and analytical population structure method,researches were directed to apparent structures,stumpage cumulative sturcutures,biomass sturctures in plantation.The results have shown that(1)the height of population in high density is concentratedly distributed in the height class from 4 m to 8 m,and accounted for about 77%,and the height of population in middle density is concentratedly distributed in the height class from 6 m to 10 m,and accounted for about 82%.(2)The peak value of distribution of the individualtree number according to diameter class,which is a truncated negative distribution model,is present to the diameter class of 6 cm that is under average diameter class.(3)The peak value of the total output of accumulation according to diameter class is present to diameter class from 10 cm to 12 cm,and their output of accumulation accounted for 378%.(4)The changes in the total biomass of individualtree number and the organs biomass are a normal distribution along with diameter class,and the peak value of the total biomass for diameter class is present to diameter class of 12 cm that was maximum value,their biomass accounted for 280%;the biomass of diameter class from 2 cm to 8 cm accounted of 127%.

关 键 词：人工林 种群 表现结构 生物量结构 

分 类 号：S718.5[农业科学—林学]