速生杨不同修枝强度对胸径和树高生长量的影响  

Effects of Different Pruning Intensities on Diameter and Height Increment of Fast-Growing Poplar

作　　者：李强 

机构地区：[1]凤城市边沟林场,辽宁丹东118100

出　　处：《防护林科技》2015年第7期51-52,64,共3页Protection Forest Science and Technology

摘　　要：基于速生杨中黑防经营技术,进行了不同修枝强度对胸径和树高生长量的影响试验,结果表明:采用中度修枝强度有利于提高速生杨胸径生长量和立木蓄积量,而弱度修枝和重度修枝强度与中度修枝相比,无论树高还是胸径,均相对减少,冠幅随修枝强度的变大而减小,冠幅面积依次为未修枝>轻度修枝>中度修枝>重度修枝。掌握适宜的修枝强度在提高树干圆满度的同时,能够提高立木蓄积量及优质木材率。The effects of different pruning intensities on DBH and height growth of Populus deltoides ＆#215;P .cathay-ana based on its silviculture technology were studied.Result shows that using moderate intensity pruning is in favor of improving DBH growth and growing stock;compared with moderate pruning intensity,tree height ＆ DBH of weak ＆amp; severe pruning all reduce;crown decrease with the increase of the pruning intensity;the descending order of crown area is no pruning〉mild pruning〉 moderate pruning〉 severe pruning.Therefore,optimal pruning intensi-ty can not only improve the trunk crown,but also increase the volume of standing tree and the quality of wood.

关 键 词：速生杨 不同修枝强度 胸径生长量 树高生长量 

分 类 号：S792.11[农业科学—林木遗传育种]