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我国北方,特别是大陆性气候显著的地区,不少林木,果树的幼树,如苹果,桃,核桃,板栗,桑树,枫杨,泡桐等常常不能安全过冬,过冬后枝梢由上而下逐步抽缩干枯,严重的整株枝条枯死,群众把这种现象叫“抽条”。一般越是生长旺盛(不充实)的树“抽条”越严重,抽条后的幼树一般还能从树干或茎基部重新抽出新梢,但树木生长延缓,果树不能及早形成树冠、延迟了结果,成为发展林业果树生产上存在的一个严重问题。
In northern China, especially in areas with significant continental climate, young trees such as apple trees, peaches, walnuts, chestnuts, mulberry, maple and paulownia often fail to winter during the winter. Branches rise from top to bottom Gradually shrink dry, serious whole plant dead, the masses called this phenomenon “drawing.” In general, the more vigorous (insufficient) the tree is, the more severely weeds are. After the seedlings are drawn, young shoots can generally be re-extracted from the base of the trunk or stem, but the growth of the trees is delayed and the canopy can not be formed as early as possible, which is delayed As a result, it has become a serious problem in the development of forestry fruit trees.