① Plastic pruning can be carried out with reference to Red Yushu. The arrangement of main branches should be adjacent but not adjacent. The central axis of the main branch and the lateral branch can be bent and extend left and right or replace the weak branch. At the same time, it should be noted that the early stage of the central trunk (within three years) should not bear fruit to ensure its growth advantage. In order to prevent the central trunk from being seriously weakened, it will cause the phenomenon of strong down and weak up in the future.
(2) Prune young trees. First of all, vigorous branches should be controlled to prevent excessive growth. Second, the branches in the inner room should be less sparse and cut more to prevent the inner room from being empty; The third is to prevent the peripheral branches from being tightly crowded and ensure the illumination in the inner room. So generally speaking, long branches should be cut, middle branches should be cut lightly, short branches should be put slowly, and straight branches should be sparse. In order to prevent the branches from becoming dense outside and hollow inside when the tree grows up, it is necessary to constantly cut off the inner branches and cultivate large and medium branches, and the outer branches can cultivate branchlets, and the upper part of the backbone branches can cultivate elongated heads by "pushing out inner buds" to reduce the amount of outer branches.
③ Pruning fruit trees should focus on cultivating robust "three sets of branches". The golden mean can be lightly cut or broken. The results should be reduced for the weak branch group and retracted in time for the drooping branch group. In May and June, the bare-legged branches should be cut back, or the injured lower branches should grow branches, and new branches should be cultivated to control the outward migration of the resulting parts. The fruit yield of trees should be strictly controlled, and the fruits should be kept and evenly distributed by thinning flowers and fruits, and each inflorescence should keep a single fruit.
(4) The branching ability of big and old trees is very weak and tends to decline, so we should pay great attention to the regeneration and rejuvenation of fruiting branches. Generally speaking, pruning should be straight, branches should be raised, weaknesses should be removed to maintain strength, flowers and fruits should be thinned, and load should be reduced to ensure quality. Branches that have been bearing fruit for 3 ~ 4 years need to be rotated and updated in a planned way. The short and weak fruit branches with continuous fruit should be updated after 2 ~ 3 years. Results Generally, 1 ~ 3 main branches should be cultivated in the branch group. When cutting the main branches, strong branches and strong buds should be taken as the head, and it should not be allowed to bear fruit. At the same time, we should also pay attention to thinning the branches with dense periphery, ensure the ventilation and light transmission conditions of the branches in the inner hole, and prevent the unbalanced phenomenon of serious outward movement of the parts caused by the exposed inner hole.