(1) light cutting and slow release: light cutting and slow release, continuous slow release and single head extension are the basic methods of fruit tree pruning. This method makes the branches especially easy to accumulate nutrients and form flower buds, and makes the fruit trees close to the trunk, which is easy to form high-quality fruits.
② Big branches are sparse and small branches are dense: I think fruit trees should grow well, and big branches should be removed to solve the lighting problem, so that small branches are more reliable, so that big branches can be bright and small branches can be dense. Pruning points: the upper part is sparse, the lower part is dense, the outer branches are sparse, the middle branches are dense, and the inner hall should be empty.
③ Upright maintenance advantage: When pruning, the central trunk should always maintain a vigorous growth trend. When it reaches a certain height, it can be leveled, bent and crowned with fruit.
(4) Strong-pulling branches and weak-shrinking branches: When pruning fruit trees, it is found that strong-pulling branches on fruit trees will weaken the growth potential of fruit trees and make them grow short and medium branches, laying a foundation for the transformation of fruit trees from vegetative growth to reproductive growth. For some branches that are too weak, they should be retracted in time to keep the tree growing, so as to "leave it blank, keep it small and empty" and be dense and sparse, so as to keep the fruit tree growing well.
The principle of shaping and pruning should be based on the consideration of early yield. If you should go, you should stay. Don't spoil the tree structure because of the small loss, which will bring trouble to the future shaping.
It is reasonable to use light cutting method, which can achieve some results, but some problems will occur if it is not used well. Here, I would like to remind everyone that we should grasp a degree problem, that is, when pruning, we should trim less branches, the trimmed parts should be short, and the amount of pruned branches should not be large. However, cutting lightly does not mean not cutting. In addition, slow-release is also one of the common methods of fruit tree pruning, which usually mainly affects the early yield of young trees, and the slow-release branches retain more lateral buds. It should be noted that slow release is not equal to random release, and blind cutting and slow release should be overcome.
After pruning, the ideal fruit tree should really have sparse upper branches, dense lower branches, sparse outer branches and dense middle branches. Finally, in the local adjustment, more branches are thinned, less nodes are truncated, less slow release is made, and the distribution of growing points is reduced; For the part with relatively weak growth, it is necessary to slow down or cut short, and increase its growth point relatively.