Pruning the main branch extension. When the main branch and the side branches are weakened, the back branches with a small growth angle can be selected as the main branch and the side branch extended branches at the front of the main branch and the side branches at 2 to 3 years. Remove the already weakened extension.
Cultivate pruning of new backbones. When some of the backbone branches are weak, they should be renewed and rejuvenated as early as possible. You can choose appropriate long branches in the crown and accelerate the cultivation to replace them. For long branches that are cultivated as backbone branches, the branches are cut longer in the first 1 to 2 years to slow down their growth. The new branches are appropriately shortened in the 3 to 4 years to promote re-branching, control the results, and affect the cultivation of the backbone branches. If the branches are too dense and weak, and proper treatment is performed, new backbone branches can be cultivated in 4 to 5 years to form a new crown.
Pruning of senescent trees with flower buds. For trees with weak trees, few branches, and many flower buds, weak cut weak branches and promote new branches. Shorten new branches at fullness, thin out excessive flower buds, adjust the "big and small years", and reduce the tree body. Burden, promote good growth of shoots.
Canopy full aging tree pruning. When pruning the canopy of an intact apple tree, the principle of both renewal and results is to recut, cut more, reduce sparseness, and strengthen the restoration of tree vigor. The large branches are lightly retracted, and the small branches are renewed, which stimulates multiple branches. The large branches should be thinned and wounds should be made to avoid weakening the tree's vigor and shortening the life span. When cutting the branches, the apex drooping branches should be retracted appropriately. The buds should be kept under the cut and the opening angle of the branches should be raised. Medium and short branches and downward budding shoots.
Crown pruning of incomplete tree. When pruning an aging tree with incomplete canopies and lacking branches and branches, use long branches to cultivate new canopies. For trees without center stems and few upper branches, choose the long branch with appropriate upper position and cultivate the center stems. For trees with inadequate main and lateral branches, long branches can be used in the absence of branches, and continuous planting can be used to cultivate the plants and lateral branches.
Pruning of weak fruiting branch groups. For the weak fruiting branch group, it is necessary to retract in time, renew and rejuvenate, promote branching, and gradually form a fruiting branch group. If the bore space is large and there is no fruiting branch group, it can be grown in the proper position with long branches or grafting to cultivate the bored branch group to restore tree vigor and increase yield.
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