速生用材树种旱冬瓜优树相关因子分析

Relevant Factors Screening for Superior Trees' Selection of Alnus nepalensis

对80株旱冬瓜优树的选择因子做相关性分析,其中环境因子包括海拔、坡度;树体因子包括树高、胸径、冠幅、枝下高、分枝角度、树皮厚度、郁闭度.以材积作为衡量各因子作用优树选择大小的指标.研究结果表明,与材积相关性最强的因子为树体因子,冠幅可作为除胸径、树高以外野外衡量旱冬瓜优树的重要因子.

Using 80 individual plants of Alnus nepalensis as experimental materials, the related factors which can be used to screening for plus tree were studied. The considered environmental factors are altitude and slope ratio; plant factors include tree height, diameter at breast height, crown width, under branch height, branch angle, bark thickness and canopy density. Timber volume is selected as the index for evaluating the relevance of the studied factors. The results show that plant factors are most related to volume, besides diameter at breast height and tree height, crown width can also be chosen as an important factor for screening for Alnus nepalensis plus tree.