杨树在整个生长发育中,修枝是一个很重要的环节。修枝的目的是多方面的,但总的目的是生产无节、少节和干形饱满的良材。目前,我区各地栽培的杨树用材林、四旁林、农田防护林,面积之大,速度之快,很是喜人,都盼望它早成材,成大材。可是现在有些地方对修枝认识不足,存在修得太狠和舍不得修的倾向;也有的把修枝当作一种掠取燃料 Poplar throughout the growth and development, pruning is a very important part. The purpose of the pruning is multifaceted, but the general purpose is to produce good material with no knuckles, knuckles and dry shapes. At present, the cultivation of poplar timber forests, four forests, farmland shelterbelt, large area, fast speed, is very gratifying, all hope that it grows early, into a large timber. However, nowadays there is a lack of understanding of pruning in some places, and there is a tendency to be too reluctant to cultivate and reluctant to cultivate prunes. Some also regard pruning as a kind of grasping fuel