Do not relax after management of peach trees
After the peach tree results, it consumes a lot of nutrients, and the peach harvest coincides with the rainy season. If the technical management can be strengthened in time, the nutrient accumulation of the tree body can be increased, the tree potential can be restored as soon as possible, and a good flower bud can be formed to improve the next year. Peach yield and quality create favorable material conditions.
1. Underground fertilizer management. Through the management of underground fertilizer and water, the tree body can be quickly absorbed and supplemented with nutrients. After the peach harvesting, the quick-acting fertilizer is applied in time. The initial fruiting tree is applied with 0.25kg of urea per plant, and the mature tree is applied with 0.5kg of urea per plant. It is necessary to control the amount of nitrogen fertilizer used to prevent the branches from growing and affecting flower bud differentiation. Press green fertilizer once in July. Foliar spray application is carried out in combination with pest control. In July, 0.3-0.5% urea solution is used, and in August-September, 0.3-0.5% potassium dihydrogen phosphate solution is used, each time interval is 15 days. From September to October, combined with deep-expanding and expansion, the base fertilizer is mainly used, and the fully-fertilized farm organic fertilizer is mainly used, supplemented by ternary compound fertilizer. The initial fruiting tree is applied with 50~100kg of organic fertilizer per plant, 0.5~1kg of ternary compound fertilizer, 100~200kg of organic fertilizer per plant, and 1-2kg of ternary compound fertilizer. The fertilization method can be either an annular groove or a radial groove, and the application depth is 30 to 50 cm.
After the peach harvest, there is more rainwater, so it is not necessary to water. If the drought time is too long, it can be watered and supplemented as appropriate. In the rainy season, it should be drained and flood-proof, cultivating and weeding to prevent soil compaction, and the frozen water should be sealed once before the soil is frozen.
2. Trim. By trimming, the tree body is ventilated and light-transmitted, promoting photosynthesis and forming a good flower bud. First, the dense branches, diseased branches, stalks, overlapping branches, and weak branches are removed to improve the lighting conditions. Soften the opening angle of the erect backbone to ease the tree potential. On the back of the erect long branches, there is softening or twisting of the growth space, controlling its growth potential, cultivating into the resulting branch group, expanding the result area, and eliminating the growth space. Debilitating branches that sag after the result can be appropriately retracted to reduce nutrient consumption and promote their renewal and rejuvenation. The long fruit branches can be appropriately shortened and cultured into a compact result group. At the end of September, the uncapped new shoots were topped once to promote tissue growth and enrichment.
3. Chemical regulation. For overgrown trees, paclobutrazol can be sprayed on the canopy to control vegetative growth and promote flower bud differentiation. The method is to spray the 15% paclobutrazol 300-500 times solution 1 to 2 times when the length of the new shoot reaches 30 cm and the secondary branch is to be withdrawn.
4. Prevention of pests and diseases. The main pests and diseases after peach harvesting are bacterial perforation, aphids, leaf miner, red spider, etc., and should be timely controlled. The prevention and treatment of bacterial perforation should be based on prevention. From the beginning of June, the surface of the leaf is sprayed with zinc sulfate and lime. The ratio is zinc sulfate: quicklime: water = 0.5:2:120, once every 15 days. 4 to 5 times; the mites can be controlled with 10% imidacloprid powder 3000 times solution or 25% idling emulsifiable concentrate 2000 times solution; the leaf miner can be controlled with 25% chlorpyrifos 3 1500 times solution; 20% of the sudden death of the suspension concentrate 3000 times solution or 1.8% of the Qiqisu emulsifiable concentrate 4000 times solution, or 30% of the moth linger 2000 times solution. Convective rubber disease, first, try to avoid mechanical damage to the branches; second, after scraping off the glue on the branches, use 10 parts of quicklime, 1 part of stone sulphur mixture, 2 parts of salt, 0.3 parts of vegetable oil and appropriate amount of water. As a protective agent, apply it to the affected area or the cut. White coating in autumn can reduce the temperature difference between day and night, prevent freezing damage and daily burning, and also kill pests and diseases on the trunk. The ratio is lime: stone sulphur mixture: salt: water = 5:1:1:20, a little clay. Evenly apply the prepared whitening agent on the trunk without dropping down. Be careful not to coat the tips to avoid burning the buds.
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