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白榆是速生优质用材树种,为合轴分枝.主干预芽早期自然死亡,由下方侧芽代替生长形成主干.这样就容易造成主干低矮、干形弯曲.为了培育出高大通直的树木,必须对其进行科学修剪.1.控制竞争枝 对于双头、多头的树木;选留健壮通直的枝条作主梢,剪除强枝,将树冠中下部的强枝短截,中枝疏剪,弱枝保留.
Elm elm is a fast-growing high-quality timber species, for the coaxial axis branch.The main bud premature death, replaced by the growth of the lower side of the bud to form the trunk.This is easy to cause the trunk is low, dry bending.In order to cultivate the tall trees straight trees, Must be its scientific pruning.1.Competition control competition For double-headed, long trees; choose to stay strong and straight branches as the main shoot, cut off the strong branches, the canopy in the lower part of the strong branch stub, branch sparse, Weak sticks reserved.