Don't relax the management of planting peach trees after harvest

After the peach tree bears fruit, it consumes a lot of nutrition, and the peach harvest coincides with the rainy season. if we can strengthen the technical management in time, we can increase the nutrient accumulation of the tree, restore the tree potential as soon as possible, and form a good flower bud. to create favorable material conditions for improving the yield and quality of peaches in the coming year.

1. Underground fertilizer and water management. Through the management of underground fertilizer and water, the trees can absorb and replenish nutrients rapidly. The method is to apply quick-acting chemical fertilizer in time after peach harvest. Urea 0.25kg is applied to each tree in the early fruit stage and urea 0.5kg is applied to each mature tree. The use of nitrogen fertilizer must be controlled to prevent excessive growth of branches and affect flower bud differentiation. Press green manure once in July. Combined with pest control, foliar fertilizer was sprayed with 0.3-0.5% urea solution in July and 0.3-0.5% potassium dihydrogen phosphate solution from August to September, with an interval of 15 days each time. From September to October, combined with deep ploughing and expansion, the base fertilizer was applied once, mainly by fully mature farm organic fertilizer, supplemented by ternary compound fertilizer. Organic fertilizer 50~100kg and ternary compound fertilizer 0.5~1kg were applied to each tree in the early fruit stage, and organic fertilizer 100~200kg and ternary compound fertilizer 1~2kg were applied to each mature tree. The method of fertilization is either annular ditch or radial ditch, and the depth of fertilization is 30~50cm.

Generally speaking, there are more Rain Water after peach harvest, but there is no need to water it. If the time of some drought is too long, water can be watered as appropriate to make up the soil moisture. In the rainy season, it is necessary to drain water to prevent waterlogging and weeding, to prevent soil consolidation, and to pour frozen water once before freezing.

2. Trim. Through pruning, the trees are ventilated and transparent, promote photosynthesis and form good flower buds. First of all, remove the dense branches, disease and insect branches, split branches, overlapping branches, thin and weak branches to improve the light conditions. Soften the angle of the upright backbone branch to ease the tree potential. For the upright branches on the back, soften or twist the shoots with growth space, control its growth potential, cultivate into fruiting branch group, expand the fruiting area, and have no growth space to remove. The weak branches drooping after the result can be retracted properly to reduce the consumption of nutrition and promote its renewal and rejuvenation. The long fruit branches can be truncated properly and cultured into compact fruiting branches. At the end of September, the uncapped shoots were peeled once to promote the growth and enrichment of the tissue.

3. Chemical regulation. For overgrowing trees, paclobutrazol can be sprayed on the crown to control vegetative growth and promote flower bud differentiation. The method is that when the length of the new shoot reaches 30cm and the secondary branches are to be produced, the crown is sprayed with 15% paclobutrazol 300 × 500 times once or twice.

4. prevention and control of diseases and insect pests. The main diseases and insect pests after peach harvest are bacterial perforation disease, aphids, leaf moths, red spiders and so on. The prevention and control of bacterial perforation disease should be based on prevention. Starting from early June, zinc sulfate lime solution was sprayed on the leaves with the ratio of zinc sulfate: quicklime: water = 0.5 120, once every 15 days, for a total of 4 times. Aphids can be controlled with 3000 times of imidacloprid powder or 2000 times of 25% aphid lice EC, and leaf moths can be controlled with 1000 times of imidacloprid 3. Red spiders can be controlled with 3000 times of 20% Miaojingjing suspension or 1.8% of 4000 times of acarine EC, or 30% of 2000 times of moxianling. For convective glue disease, one is to avoid mechanical damage to the branches as far as possible, and the other is to scrape off the glue on the branches and use 10 parts of quicklime, 1 part of stone-sulfur mixture, 2 parts of salt and 0.3 parts of vegetable oil with a proper amount of water. just smear the affected area or cut place. Painting white in autumn can reduce the temperature difference between day and night, prevent frost injury and sun burn, and kill diseases and insect pests on the tree trunk. The ratio is quicklime ∶ stone sulfur mixture ∶ salt ∶ water = 5 ∶ 1 ∶ 1 ∶ 20, clay a little. Apply the prepared whitening agent evenly on the trunk without flowing down. be careful not to apply the tip of the branch so as not to burn out the buds.