苹果树修剪量的大小(或修剪程度的轻重),可以根据修剪反应进行判断。观察反应的部位,是骨干枝上的3年生枝段;观察反应的指标,是3年生枝段上的分枝情况,和其上的一年生枝的生长长度。修剪后,当3年生枝段上多数为中、短枝条,1年生枝的长度显著短于延长 Apple tree pruning size (or the degree of pruning severity), can be judged according to the pruning reaction. Observed the site of the reaction is the 3-year-old branches on the backbone of the branch; observed response indicators are branches on the 3-year-old branches, and the annual growth of its branches on the length. After trimming, when the majority of 3-year-old branches are medium and short branches, the length of 1-year-old branches is significantly shorter than the extension