Peach fruit picking tree management continues

After the peach fruit was picked, the assimilation of leaves continued, nutrients began to accumulate in the tree, and the summer and autumn season was the period of flower bud differentiation. From the period of fruit harvest to defoliation, the amount of nutrient accumulation and flower bud differentiation are closely related to the yield and quality of peach fruit next year. Therefore, after the peach fruit is picked, the management is not over and still needs to be strengthened.

1. Apply fruit-picking fertilizer. After fruiting, the tree consumes a lot of nutrients, so nutrients must be replenished in time to restore tree potential, enhance leaf photosynthesis, enhance the accumulation of tree nutrients, ensure sufficient nutrients for flower differentiation, improve flower bud quality and winter cold resistance. After fruit harvest, 0.5 kg of urea was applied to each tree, and 0.2% potassium dihydrogen phosphate solution was sprayed on the leaves for 2-3 times.

2. Prevention and control of diseases and pests. After peach fruit picking, peach leaves will also be harmed by a variety of diseases, leaf miner, leafhopper and so on. If the control is not effective, peach leaves will fall off early, affecting nutrient accumulation and flower bud differentiation, so attention should be paid to inspection and timely control. For pests, dichlorvos and omethoate can be sprayed; for diseases, fungicides should be sprayed every 10-15 days after fruit harvest, and 70% methyl topiramate wettable powder, 65% mancozeb wettable powder and 30% green EC can be sprayed alternately.

3. Reasonable pruning. After peach fruit picking, the growth of new shoots is accelerated, and the ability to form secondary shoots is strong, which is easy to cause poor ventilation in the chamber, increase nutrient consumption and affect flower bud differentiation, so it must be pruned reasonably. For the strong branches or branches in the upper part of the crown, they can be sprained and pressed from the base after thinning the strong shoots, so that the growth potential of the base can be controlled, and the nutrition can be concentrated to supply flower bud differentiation; for competitive branches, the method of sprain can be adopted to control the growth and transform to fruiting branches; for overlapping branches, crossed branches and old and weak branches, they should be retracted in time; for over-dense branches, thin and weak branches and useless erect branches, they should be thinned. For the erect branches with space reservation, they can be pressed down in the crown to ease their growth potential.

4. Cover grass with shallow ploughing. After picking the fruit, use a four-toothed rake to dig the garden soil 10-15 cm, then sprinkle a thin layer of straw or wheat straw to cover it. In this way, it not only loosens the soil, increases soil ventilation, is beneficial to root growth, but also eliminates weeds and enriches soil organic matter.

5. Drought resistance and waterlogging prevention. Peach trees have shallow roots and are afraid of both drought and stains. Therefore, when it is dry in summer, it is necessary to irrigate in time to fight drought; if it is rainy, it is necessary to clear the ditch and drain in time.

6. Apply base fertilizer in autumn. The deep ploughing of soil with the application of base fertilizer can improve the soil structure and physical properties of peach orchard, improve the ability of soil fertilizer and water conservation, and create good conditions for root growth. The application of base fertilizer can increase the accumulation of nutrients in the tree and lay a solid foundation for the high yield of peach fruit next year. A ditch with a depth of 80 cm and a width of 50 cm was dug from the outer edge of the planting hole and 20-30 kg of pig and cow manure and 1 kg of phosphate fertilizer were applied to each tree from October to November. Phosphate fertilizer had better be mixed with organic fertilizer before application and then compost for more than half a month. When applied, it should be mixed with surface soil and filled into the ditch to fill the core soil on the surface.