摘要
对沙地樟子松人工林10~60 a林龄样地进行树高、胸径等生长指标调查、观测,使用SPSS20.0进行分析,结果表明:不同林龄树高与胸径、冠幅大小、第一活枝下高高度各生长量两两之间有极显著相关关系,林木树高与胸径、冠幅之间存在正相关关系;树高生长量随胸径变化模型为y=0.405x1.104,树高生长量随冠幅变化模型为y=e2.895-2.836/x。
The growth index of height and DBH of 10 ~ 60 a sample plot of Pinus sylvestris var. mongolica man-made forest in sand were investigated and observed. Furthermore,it was analyzed with SPSS20. 0. The result showed that the height and DBH,canopy size,first clear bole height increment of different age of stand presented highly significant correlation.Moreover,the height and DBH,canopy existed positive correlation. The mode of height increment changed with DBH was y = 0. 405x1. 104. The mode of height increment changed with canopy was y = e2. 895-2. 836/x.
出处
《吉林林业科技》
2017年第1期12-15,共4页
Journal of Jilin Forestry Science and Technology
关键词
沙地樟子松
不同林龄
树高
胸径
Pinus sylvestris var
mongolica in sand
different age of stand
height
DBH
