冠高比法修枝对杨树生长的影响分析

Effect Analysis of Pruning with Crown Height Ratio on Poplar Growth

修枝在营林工作中是一项有效的森林抚育技术,不仅可以提高林木质量,促进林木生长,还能够增加一定的经济效益;通过弱度修枝(T1)、中度修枝(T2)、重度修枝(T3)与不修枝(CK)对照,对渤丰3号杨进行修枝试验,从试验结果来看:中度修枝处理中,胸径、树高、材积增长量高于弱度修枝、重度修枝;即保留树冠高度占树高的1/2,中度修枝(T2)为最佳修枝处理方式。

Pruning is an effective forest tending technology in forest management,which can not only improve the quality of trees,promote the growth of trees,but also increase certain economic benefits.Pruning Experiment of Populus Bofeng 3 was conducted by comparing weak pruning(T1),moderate pruning(T2),severe pruning(T3)and no pruning(CK)The increment of tree height and volume was higher than that of weak pruning and severe pruning,that is,the crown height was 1/2 of the tree height,and moderate pruning(T2)was the best pruning method.