摘要
利用2016—2017年江西官山国家级自然保护区35个生物多样性监测卫星样地,对林分特征和蓄积量的关系进行相关分析和通径分析。结果发现:林分蓄积量为2.45~32.49 m^3/666.7 m^2,呈正态分布;林木平均胸径、最大胸径与蓄积量之间存在显著正相关关系,林分密度、毛竹密度与蓄积量之间呈显著的负相关关系。林分密度对蓄积量存在正向直接作用,但它会通过平均胸径、最大胸径对蓄积量产生负向间接作用。根据决策系数决定影响林分蓄积量的因子排序依次为:最大胸径、平均胸径、毛竹密度和林分密度。因此,控制林分密度、增加林分胸径,有利于蓄积量增长。
Based on 35 biodiversity monitoring satellite plots(2016-2017)of Guanshan National Nature Reserve,Jiangxi Province,the impact of the main stand characteristics of the volume,by correlation analysis and path analysis were analyzed in this paper.The results showed that stand volume was 2.45-32.49m^3/mu(667m^2),a normal distribution.There was a significant positive correlation between the mean DBH,maximum DBH and volume,and a significant negative correlation between stand density,bamboo density and volume.The stand density had a positive direct effect on the volume,but it had a negative indirect effect on the volume through the mean DBH and the maximum DBH.Therefore,according to the decision index(R^2)of path analysis,the order of factors affecting the stand volume were the maximum DBH,average DBH,bamboo density and stand density.From the point of view of stand timber production,the stand density should be controlled to increase stand DBH,which was beneficial to the increase in stand volume.
作者
王囯兵
文仁权
熊勇
李存海
徐定兰
杨清培
WANG Guo-bing;WEN Ren-quan;XIONG Yong;LI Cun-hai;XU Ding-lan;YANG Qing-pei(Administration of Jiangxi Guanshan National Nature Reserve,Yifeng,Jiangxi 336000,China;School of Forestry,Jiangxi Agricultural University,Nanchang 330045,China)
出处
《生物灾害科学》
2019年第4期332-338,共7页
Biological Disaster Science
基金
中央财政林业国家级自然保护区补助资金项目
关键词
林分特征
蓄积量
相关分析
通径分析
决定系数
characteristics
stand volume
correlation analysis
path analysis
decision index
