The key point of apple dwarfing and close planting cultivation technology is to dwarf trees by manual and chemical control methods, increase the number of plants per unit area and greatly improve the yield per unit area. The key points of apple dwarf close planting management are as follows:

1, increasing planting density

The crown volume of dwarf grafted apple trees is smaller than that of arbor grafted apple trees, and the yield per plant of dwarf grafted apple trees is lower than that of arbor grafted apple trees. Therefore, the planting of dwarf varieties must be based on different dwarf varieties and different types of short-branch varieties, appropriately increase the planting density, and carry out reasonable intensive planting.

2. It is not advisable to use more main branches, and the planting density is high. The main contradiction caused by planting dwarf apple trees is limited space, too fast growth of branches and leaves, and too fast growth rate. Therefore, when thin plastic trunks should not be used, spindle, slender shaft and spindle-shaped trees should also be used or improved. No matter what kind of spindle-shaped tree, its structural characteristics are main branches and no side branches. When pruning trees, we should control the crown size and increase the number of branches. Because we advocate increasing the number of branches and there are no side branches, we should prevent the growth potential of the main branches from being higher than that of the trunk center, and we should not make the trunk elongate and grow too fast, so as not to affect the growth potential of the trunk center. The branches of each upper branch should be contracted, and the pruning should be mainly light and less. When pruning in winter, the trunk of small trees can be stretched without pruning.

3. Pay attention to timely renewal, greening, dwarfing, compactness, high planting density, more fruit per plant and high apple yield. The light conditions in orchards are not as scarce as those in arbor plantations, so if the supply of fertilizer and water is slightly insufficient, the trees will be very fragile. If the variety is short and the management can't keep up, the tree will be more prone to premature. Due to the above reasons, some trees blossom to the top after they enter maturity, so we must pay attention to pruning and updating in time to ensure nutrition and water supply in fertilizer and water management. When pruning, attention should be paid to adjusting the potential of trees to balance them, maintaining the growth advantage of central dryness, delaying aging and prolonging the economic life of trees.

4. Improve the lighting conditions and increase the photosynthetic efficiency of leaves. For apple trees with many trees, branches and leaves and high density, various measures should be taken to improve the lighting conditions and improve the photosynthetic efficiency of leaves. Therefore, it is sparse in winter and sparse in summer when necessary. Adjust the structure of fruit trees in time, improve the effective leaf area coefficient and reduce the shading around the orchard. To build a garden in a mountainous area, you must build a garden in an open area with sunshine. It is best to plant trees and square trees on the north-south line. The row spacing should be larger than the plant spacing to prolong the illumination time and improve the photosynthetic efficiency. After proper thinning of branches and leaves, the leaves should be prevented from premature aging or falling off to ensure that the photosynthetic efficiency is still good in the later stage.