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Second, reasonable summer cut. During the growth period, the dense branches were removed, the invalid branches were left, and the branches were kept on the windward side, and the branches were kept on the leeward side to promote ventilation and light transmission. After the persimmon is trimmed, the buds will germinate in large numbers. In order to reduce nutrient consumption, useless sprouts should be erased as soon as possible. Long branches with growth space, especially the leggy branches, must be picked up at 40 cm in length.
Third, remove buds. When the results on the mother twigs of 2-4 branches, keep the first two results of the mother buds in the middle of the three buds, the buds of other results on the branches of all dredged and reserved for the preparation of branches; if the results of the mother branches When there are more than 5 branches, the results of the first 3 branches should be retained. Each result will have 3 flowers in the middle, and the rest will be removed.
Fourth, Qiaoshui water. Large trees entering the fruitful period of time will have to double their fertilizer and water management. It is not too early to apply base fertilizer in the autumn and topdressing in the spring. Generally, in the top dead shoots in May and the fruit enlargement in July, the two fertilizers can significantly improve the fruit setting rate; The number of flower buds and the quality of flower buds are increased.
Fifth, chemical regulation. Spraying a concentration of 500 mg/kg gibberellin solution plus 1% urea solution at full flowering stage and young fruit stage can improve the nutritional status of flowers and fruits and increase the fruit setting rate. During the period of rapid fruit expansion, foliar spray of 0.3-0.5% urea solution and trace element fertilizers such as ammonium molybdate can reduce flowering and fruit drop.
What is the reason why a large number of persimmon trees drop fruit
First, flowering girdling. The girdling was carried out at the early flowering stage and the flowering stage was completed. The girdling was applied to strong trees and strong branches. The width of the ring mouth is 0.3-0.5 mm. After peeling, it is peeled off with a plastic cloth to keep the humidity and promote healing.