苗木种植前应进行根系修剪,将劈裂根、病虫根、过长根剪除,并对树冠进行修剪,保持地上地下平衡,减少水分的散发,保证树木成活。修剪时其修剪量依不同树种要求而有所不同。1.乔木类的修剪:(1)具有明显主干的高大落叶乔木应保持原有树形,适当疏枝,对保留的主侧枝应在健壮芽上短截,可剪去枝条的1/5—1/3。 Planting seedlings should be carried out before the root pruning, the split root, pest root, long root pruning, and canopy pruning to maintain ground balance, reducing the distribution of water to ensure the survival of trees. Pruning its pruning according to different species requirements vary. 1. Arbor class pruning: (1) tall deciduous tree with obvious trunk should maintain the original tree shape, suitable for thinning branches, the main branch should be retained in the sturdy bud short cut, you can cut the branches of 1 / 5- 1/3.