樟子松是强阳性树种,枝叶不耐荫,阳光不足时易逐渐枯死,为促进幼树生长,应及时整枝。 幼林阶段的整枝,应根据造林密度和林木生长情况来确定。为使幼林能早期郁闭,加快生长,尽早起到防护作用,初植密度每亩为5,000～6,000株,栽后5～6年内不进行整枝。10年生树高达3.0米左右,株间开始郁闭,再过1～2年,当树冠下部出现1～2轮枯死枝时进行第一次整枝。为保持适宜的树冠,促进林木的正常生长,幼树整枝强度不可过大,一般保持树冠长占树高的2/3, Pinus sylvestris is a strongly positive species, branches and leaves are not shade, the sun is easy to gradually die, in order to promote the growth of young trees, pruning should be promptly. Pruning of young forest stage, should be based on afforestation density and forest growth to determine. In order to make the young forest early canopy, accelerate the growth, play a protective role as soon as possible, the initial planting density of 5,000 to 6,000 acres per plant, after planting 5 to 6 years without pruning. 10-year-old trees up to about 3.0 meters, between strains began to be closed, and then 1 to 2 years, when the lower part of the crown appeared 1 to 2 dead branches when the first pruning. In order to maintain appropriate crown, and promote the normal growth of trees, young pruning strength can not be too large, generally maintain the crown length accounted for 2/3 of the tree height,