From the fruit picking to the defoliation, during this time the nutrients produced by the leaves are no longer used for fruit consumption, but for the further differentiation and enrichment of flower buds, thickening of branches, tissue maturation and accumulation of major nutrients. Therefore, good management during this period will not only increase tree nutrition, improve wintering ability and resistance to adverse environmental conditions, but also have a decisive effect on flowering and fruiting in the coming year.
1. Adjust the amount of branches of the tree. After the cherries are harvested, the dense branches, thin branches, whip sticks and diseased branches should be removed or short-cut to open the light path, enrich the branches, reduce unnecessary consumption, and facilitate flower bud differentiation and The branches are mature.
2. Prevention of pests and diseases. Peach leafhopper is also called floating sinker. It is the main pest in the late growth stage of cherries. It is the strongest in the period from July to September. The yellow and white spots appear on the damaged peach leaves. When it is serious, the whole leaves are yellow and fall off early, causing the tree to weaken and affect the flowers. Form and reduce production in the coming year. The precautionary measure is to spray 200 times Bordeaux mixture or 40% of dimethoate emulsifiable concentrate 1000--1500 times immediately after fruit picking.
3. Scientific fertilization. From the end of May to the beginning of June, the application of organic fertilizer 50-1000kg, if mixed with 1kg / strain of superphosphate, the effect is better. The fertilization method can be applied alternately in radial and circular shape, and the position is directly below the periphery of the canopy. The fertilization ditch should be shallow and deep inside, so as not to damage the excessive root system, and then watering once.
4, foliar spray fertilizer. After picking the fruit, spray 0.5%--1% urea solution every 10-15 days, and spray 0.5% superphosphate solution to increase the photosynthetic capacity of the leaves and increase the nutrition of the branches.
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