摘要
以关帝山国有林场30年生华北落叶松人工林为研究对象,通过标准地调查,研究华北落叶松人工林林分生长因子与林分密度的相关性。结果表明,林分密度对胸径、树高、冠幅、枝下高均有一定程度的影响。枝下高随林分密度的增大而增加,树高有微弱增大的趋势,而冠幅、胸径均与林分密度呈显著负相关关系;林分密度为200株/hm2时,胸径与树高、冠幅显著相关,胸径、树高、冠幅和枝下高之间均不存在显著相关关系;林分密度为725株/hm2时,树高、胸径、枝下高和冠幅各生长因子间均不存在显著的相关关系;林分密度为1 400株/hm2时,胸径与树高极显著相关,胸径与冠幅,胸径与枝下高,树高与冠幅、枝下高,枝下高与冠幅间不存在显著的相关关系。
To find the change rule and provide theoretical reference for the management and administration of Larix principis-rupprechii plantation in shanxi province,the correlation and response between growth factor and stand density were studied through sample plot inventory with Larix principis-rupprechtii middle-aged forests in Guandi mountain as research object.Results showed that the stand density had a certain influence on DBH,tree height,crown width and height under branch.The height under branch increased with density and tree height had a slight increase with the increasing of density,while there was a significant negative correlation between the stand density and DBH or crown width. When the density was 200 stubs/hm2,there was a significant correlation between DBH and tree height or crown width. and there was no significant relationship between DBH,tree height,crown width and height under branch. When the density was 725 stubs/hm2,there was no significant relationship between tree height,DBH,height under branch and crown width. When the density was1400 stubs/hm2,the DBH was significantly related to the tree height. But there was no significant relationship between DBH and crown width,DBH and height under branch,tree height and crown width,tree height and height under branch,height under branch and crown width.
出处
《山西林业科技》
2017年第4期7-10,共4页
Shanxi Forestry Science and Technology
基金
山西省森林生态科学数据共享服务平台(201605D121017)
山西省青年科技研究基金(201601D021115)
山西煤炭可持续发展基金(GHY-2013-J68)
关键词
林分密度
林分生长
华北落叶松
中龄林
人工林
Stand density
Stand growth
Larix principis-rupprechtii
Middle-aged forests
Plantation
