By changing the angle of the branches, the growth force of the branches can be changed, and the strength of the branches can be weakened. Then, the ingenious retraction can completely change the problem of confinement of the orchard caused by the long main branch.
The growth of shoots is determined by both top and vertical advantages. The so-called apical dominance refers to the growth of the apical shoots of shoots and inhibits the growth of lateral shoots. It is shown that the shoots grow forward. The vertical advantage means that for a shoot, the relatively high position has a strong growth. Advantage. Combining these two growth laws, we analyze a branch. If the angle of the branch is not opened, the top advantage is at the top, and the vertical advantage is also at the top. It shows that the branches grow vigorously, and they grow longer, stronger before and weaker. If the branches are pulled down, the apical dominance is at the top, and the vertical dominance is in the middle and posterior parts. The entire twigs are neutralized, and they are not easy to prosper, and they tend to result in flowers.
For branches that are already too long, strong before, and weak, they must immediately take drastic measures to pull them down. The angle should be appropriately increased and the grounding of the branches does not matter. Then, the rear part adopts measures such as carving and ring cutting to retain nutrition, restore growth and cultivate new branches. After waiting a year or two, the front forces were completely weakened, and they retreated gracefully from a reasonable place. Only in this way can we shrink back, do not rebound, and fundamentally solve the problem of long main branches.
For the same reason, the same method should be adopted for the control of the branch on the back of the main branch and the control of the side branch. It cannot be cut or cut, but it is pulled down from the base. The specific approach should be based on the local fertilizer and water conditions, fruit species, spacing, growth and other factors taken into account to determine the main branch angle. In general, the greater the amount of growth, the greater the main branch angle should be. After the angle of the main branch is determined, the dry height is determined based on the situation after pulling the branch at this angle. For the main branch that is too low, it should be removed year by year, that is, the so-called lifting, after the dry, can pull the upper long main branch down.
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