山楂是一种结果早、 产量高、寿命长的果树。 山楂幼树阶段顶端优势明 显,极性强、生长旺、发 枝少,枝条上的芽体有异 质性,长旺校更加显著, 顶端的芽体发育充实饱 满,下部的芽体瘦秕不易 萌发。故枝条后部往往出 现光秃,而先端易萌发强 旺的徒长枝,造成树体结 构紊乱,内瞠风光 Hawthorn is a result of early, high yield, long life fruit trees. Hawthorn saplings at the top of the obvious advantages, strong polarity, growth Wang, less branches, shoots on the branches heterogeneity, Chang Wang school more significant, the top of the bud full of growth, the lower part of the bud body is not easy Germination. So the back of the branches tend to appear bald, while the tip is easy to germinate growth of leggy branches, causing the tree structure disorders, infighting scenery