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1.平衡树势,主从分明。苹果树从树形要求上看,应下大上小,主枝均匀,主从分明,上下平衡,内密外稀,通风透光。为此在修剪时应采取强枝,少留多疏,由大变小的修剪手法;而对弱枝,则轻剪长放,多留少疏,由小促大。上强的树多用抑上促下,中心枝换头,其上少留辅养枝,抬高下层枝角度等修剪法平衡树势。在从属关系上,中心主枝强于侧生主枝,下层主枝大于上层主枝;主枝大于侧枝,侧枝大于辅养枝。
1. balance tree potential, the main clear. Apple tree from the tree requirements point of view, should be under the big small, the main branch uniform, the main from a clear, up and down balance, the secret dense thin, ventilated and light. To do this in the pruning should take strong branches, leaving more sparse, from the smaller pruning practices; and weak branches, then light cut long, leaving less sparse, small promotion. On the strong use of the tree on the promotion, the center branches change head, on which to keep supporting branch, raise the lower branch angle pruning balance tree potential. In the subordinate relationship, the main branch of the center is stronger than the main branch of the main branch, and the main branch of the lower branch is larger than the main branch of the upper branch. The main branch is larger than the lateral branch, and the lateral branch is larger than the branch supporting branch.