杉木人工林生物量变化规律的研究  

Study on the Change Laws of Biomass of Chinese Fir Plantations

作　　者：段爱国[1] 张建国[1] 何彩云[1] 童书振[1] 

机构地区：[1]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

出　　处：《林业科学研究》2005年第2期125-132,共8页Forest Research

基　　金：国家"十五"攻关项目"南方主要针叶用材林树种新品种选育及培育技术"

摘　　要：基于大岗山林区相似立地条件前后3次生物量调查研究资料,结合杉木人工林固定样地长期观测材料对杉木人工林生物量的变化规律作了较为详尽的研究,得到了如下主要研究结果:(1)对于同一林分,除叶生物量和某些枝生物量存在一个减小的时期外(5a至8a时),单株和林分各组分生物量均随林龄的增加而增大。在12a前的林分速生期间,叶、枝、干所占比重微弱增加,致使地上部分比重增加,而根比重减小;在干材期(12～16a),单株各组分所占比例趋于稳定。(2)立地指数对单株和林分各组分的生物量、总生物量以及生物量分配比率均存在显著影响,且这种影响随着林龄的变化而变化,并受初植密度的制约。(3)随着初植密度的增大,单株各组分生物量明显减小,干生物量分配比率在任一林龄时刻均呈下降趋势;由密度所形成的不同林分生物量间的差距随林龄呈减弱的趋势。Based on study materials of 3 biomass research in the similar site condition of Dagangshan forest region and the observed materials of permanent sample plots of Chinese fir, this paper made a relatively detailed study on the change laws of biomass of Chinese fir plantations, and obtained the main results as follows: (1)For the same stands, except that biomass of leaves and some branches have a decreasing duration(from 5 a to 8 a), biomasses of various parts of mean individual and stand all increase with the increasing of stands age, during the quick growth years of stands, the proportions of leaves, branches and stem are weakly increasing, with above ground parts increasing and roots decreasing. In stem growth stage(12～16 a), the proportion of each organ of mean individual tends to be stable. (2)Site indices have obvious affection on the amount of biomass, biomasses of all parts and allocation rate of mean individual and stand, the affection varies with stand age, and is restricted by planting density. (3)With the increasing of planting density, the biomass of each organ of mean individual obviously decreases, the allocation rate of biomass of stem tends to decrease at any age; the discrepancies of biomasses of different stands, caused by planting density, tend to decrease with the increasing of stand age.

关 键 词：杉木人工林 生物量 立地 密度 变化规律 

分 类 号：S791.27[农业科学—林木遗传育种]