Summer pruning: The purpose of summer cutting is to adjust the structure of the tree, improve lighting conditions, balance tree growth, and promote vegetative growth to reproductive growth and transformation. There is space for the competition branches, upright branches and over-expanding branches to be twisted or short-cut, and there is no room for sparse elimination. The prosperous saplings are plucked when their tip length reaches about 40 cm. In early June, girdling or circumcision was applied to 4-7-year-old juvenile trees without flowers (Marshal's cultivar only circumcised 1 or 2) to promote flower bud formation. The girdling width is generally about 1/10 of the diameter of the branches. When taking care of the circumcision, do not injure the xylem. After peeling, use a newspaper or a thin film to wrap the edge of the knife to ensure that the ring is fully healed within 25 to 30 days.
Soil and Fertilizer Water Management: In June, apple flower bud differentiation period, should pay attention to the use of nitrogen, phosphorus, potash fertilizer. After the new shoot has been stopped for a long time, the topdressing of compound fertilizer is about 1 kilogram per tree. Large trees with more results can be more. Can be combined with spray spraying 0.3% ~ 0.5% of urea plus 0.3% of potassium dihydrogen phosphate for foliar fertilizer. Saplings have proper water control, and the result is that trees should be suitable for drought resistance to inhibit shoot growth, accumulate nutrients, and promote flower bud differentiation. At the same time pay attention to flood prevention.
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