It is not appropriate to use a tall tree with multiple main branches
Gao Hua believes that the high planting density of dwarf dense planting apple trees will lead to limited tree growth space, excessive plant foliage, and excessive growth speed. Therefore, when using pruning and shaping, it is not appropriate to adopt trunk sparse tree structure, but to adopt a spindle shape. Elongated spindle or modified spindle tree. No matter which kind of spindle-shaped tree, its structural characteristics are main branch without side branch.
When pruning the tree, pay attention to the size of the crown and try to increase the number of main branches. As the number of main branches increases and there are no side branches, the growth potential of the main branches must be prevented from being stronger than the growth potential of the central stem. Do not make the main branches of the tree grow and grow too thick so as not to affect the growth of the central stem. . The branches on each branch should be reduced. The method of pruning should be based on light shearing and less cutting. When pruning in winter, the main branches of young trees may not be cut.
Pay attention to timely update and rejuvenation
Dwarf dense planting apple trees have high planting densities, many trees bearing fruit, and high yield per unit area. However, the light conditions in the orchard are not as good as those of the Joe anvil. Gao Hua said that if there is a shortage of fertilizer and water supply, the tree vigor is easy to weaken. If the varieties are short-stemmed varieties, management can not keep up, and trees are more prone to premature aging. Due to the above reasons, after the tree enters the full fruit period, some of the trees bloom to the top, and special attention must be paid to the timely renewal of pruning. In the management of fertilizers and waters, nutrition and water supply must be guaranteed. When pruning, attention should be paid to adjusting the tree vigor to make it balanced. It is necessary to maintain the growth advantage of the center and delay aging, so as to extend the economic life of the tree.
Improve lighting conditions and enhance leaf photosynthetic efficiency
There are many dwarf and densely planted apple trees, many branches, and many leaves. Gao Hua suggests that various measures should be taken to improve the light conditions and enhance the photosynthetic efficiency of the leaves. To this end, winter shear should pay attention to sparse cuts, and sparse shears should be carried out in summer if necessary. Timely and appropriate adjustment of the tree structure to increase the effective leaf area factor should also reduce the shading from around the orchard. When constructing an orchard in a mountainous area, a garden must be built in an open area in sunny areas. Trees should be planted in the north and south, and planted in rectangles. The distance between rows should be greater than the distance between the rows in order to extend the lighting time and enhance the photosynthetic efficiency. After proper thinning of branches and leaves, premature leaf decay or shedding should be prevented to ensure that the photosynthetic efficiency in the late growth stage is still good.
YT-H706
YT-H706
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