辽宁省章古台沙地樟子松人工林不同林龄和密度对树高生长影响的研究  

The research of effect of different age of stand and density of sand Pinus svlvestris var. mongolica artificial forest of Liaoning Zhanggutai on height growth

作　　者：周凤艳[1] 

机构地区：[1]辽宁省固沙造林研究所,辽宁阜新123000

出　　处：《吉林林业科技》2017年第2期4-8,共5页Journal of Jilin Forestry Science and Technology

摘　　要：以辽宁省章古台沙地樟子松人工林为对象,对其不同林龄、不同林分密度的树高年生长量进行观测与分析,结果表明:10 a生最大年生长量的最适密度为1 425株·hm^(-2),20 a生为1 175株·hm^(-2),30 a生为1 175株·hm^(-2),40 a生为750株·hm^(-2),50 a生为650株·hm^(-2),60 a生为450株·hm^(-2),随林龄增加树高最大年生长量的最适密度呈下降态势。10~60 a生6个不同龄级、同龄级不同密度的树高年生长量均存在显著差异,P<0.05。The height annual increment of different age of stand and density were observed and analyzed by taking Pinus sv-lvestris var. mongolica artificial forest of Liaoning Zhanggutai as object. The result showed that the optimum density of maxi-mum annual increment of 10, 20, 30, 40, 50, 60 years were 1 425, 1 175, 1 175 , 750, 650, 450 plant per hectare. The optimum density of maximum annual increment presented deline tendency along with the increase of age of stand. It existed significant difference among height annual increment of 6 different age - class and same age - class different density of 10 -60 years, P 〈0. 05.

关 键 词：辽宁章古台 沙地樟子松 不同林龄 不同密度 树高年生长量 

分 类 号：S791.253[农业科学—林木遗传育种]