The cutting degree of main branches increases with the weakening of growth potential, with the thickness of 1 ~ 1.5 cm and the cutting length of about 30 ~ 50 cm. Maintain the growth potential of the main branch by scaling and properly increasing the extension angle.
When pruning side branches, we should still consider maintaining the affiliation with the main branch. It can be pressed up and down between each side branch, that is, the upper side branch is cut heavy and the lower side branch is cut light to maintain the bearing life of the lower side branch. However, excessive pruning will weaken the growth of lateral branches and shorten their life. If the lateral branch is strong in the front and weak in the back, it is mostly caused by the small angle in the front. To remove the strong branches at the vertex, take the opening angle as the head to make the back stronger. If the anterior and posterior collateral branches are weak, it is caused by too many results. You can shrink and cut off the extended branches, choose strong branches as the head, improve the angle of branches, sparse the weak branches behind, reduce the amount of fruit left, and promote the recovery of growth. For the lateral branches with weak growth potential and no room for growth, they can be reduced and transformed into large branches, taking fruit branches as the first step without expanding.
The pruning of branches in full fruit period should pay attention to the combination of culture and regeneration. When the branches are weak, the base is thin and weak, the fruit branches are short, the fruit branches are in a bouquet, or the fruit parts are far from the backbone branches, they should be renewed and rejuvenated in time. Branchlets rot early and are often cut down to keep them close to the backbone branches to maintain their growth potential. When the hole is large, the middle branch is too high or the upper branch is strong and the lower branch is weak, the height can be reduced by slight shrinkage shear, and the expansion can be limited by taking the fruit branch as the head. If the branches are neither weak nor too high, only the strong branches are thinned and not shrunk. The cutting principle of large and medium branches growing on the side and periphery is the same as that of side branch pruning, and it is also a combination of weak contraction and strong expansion to maintain fruit space.
Moderate cutting and thinning crown regeneration are the keys to pruning fruit branches in full fruit stage. The long fruit branches are about 7-8 knots long, and the middle fruit branches are 3-5 knots long. And according to the tree potential, varieties, the total number of branches of the whole tree to adjust. You can stay for a long time under the following circumstances. Fruit branches with higher flower bud nodes and longer internodes; There were few achievements in that year, and next year is a big year; Fruit branches, early-maturing varieties or varieties with small fruit shapes are located at the periphery of the crown or the upper part of the branch group; Varieties with heavy fruit drop and severe freezing injury; Canned varieties can be preserved for a longer time. Short fruit branches are weak after fruiting, and most of them are flower buds except the terminal buds, so they should not be cut off casually, and only when there are multiple buds or leaf buds in the middle and lower parts can they be cut off. Bouquet-shaped fruiting branches are all single flower buds except the terminal buds; Bouquet-shaped fruit branches planted on the back or side of 2 ~ 3-year-old branches are easy to bear fruit. Generally, the weight of fruit falling is removed in the parts with poor ventilation and light transmission conditions. Over-dense middle fruit branches and short fruit branches should be thinned to maintain ventilation and light transmission conditions in the crown.
In the full fruit period, the fruiting ability of fruiting branches is weakened after fruiting, so it needs to be updated in time and the number of preparatory branches should be increased appropriately. You can use a single-branch update or a double-branch update.