很多树种,特别是一些速生的阔叶树,在自然生长状况下往往会形成主干低而弯曲,枝杈过多,丛状生长,达不到优质的要求。为了抑制侧枝,促进主干高生长,获得更加有用之材,应及时修枝。1、树木修枝要掌握好修枝强度。一般阴性树种和常绿树种保留的“冠高比”要大些,而阳性树 Many tree species, especially some fast-growing broad-leaved trees, tend to form low and curved trunks in their natural growth and excessive twigs and plexiform growth, failing to meet the high-quality requirements. In order to inhibit collateral, promote high growth of the trunk, access to more useful materials, should be promptly pruned. 1, tree pruning to grasp the strength of pruning. Generally negative trees and evergreen species retained the “crown-height ratio” to be larger, while the positive tree