How to manage "postpartum" apple trees

Apples are popular fruits. If the apples are not properly managed after harvest, the yield will decrease year by year. If properly managed, it can not only reduce the damage caused by cold winter to fruit trees, but also lay the foundation for high yields in the coming year. 1. Quickly apply "postpartum" fertilizer Because the tree consumes a lot of nutrients during the fruiting period, quick-acting fertilizer should be applied as soon as possible after fruit picking to promote the early recovery of tree vigor, enhance the function of leaves to produce carbohydrates, ensure sufficient nutrition for flower bud differentiation and tree nutrition storage, spray new lipid membrane at the same time of fertilization, improve the utilization rate of effective components of fertilizer, and reduce residual toxicity. II. Scrub buds, pick cores or twist tips in time When the new shoots in the crown grow to 20~30 cm, they should be picked or twisted. For cluster branches, over-dense branches, thin branches, drooping branches, excessive branches, pests and diseases branches should be selected partially or completely cut off. III. Prevention and control of diseases and insect pests 1. In addition to cutting off the branches of pests and diseases, but also hook in addition to drilling into the trunk of the winter larvae, but also can smear callus antiseptic film, to prevent the winter disease habitat reproduction. 2. Clear the dead branches and leaves in the garden, scrape off the thick bark of the tree trunk, and burn it intensively. White tree trunk with sulfur mixture can kill eggs. 3. Spraying tree protection generals, disinfection and sterilization, closing virus replication and transmission routes, urging fruit trees to hibernate early, the spirit of the coming year. IV. Shallow tillage and grass cover In order to meet the needs of fruit tree root growth and respiration, after fruit picking, some straw, straw or grass should be covered under the canopy, and then some broken soil should be covered to prevent wind and grass. In this way, it can not only make the soil loose and ventilated, but also keep moisture, drought resistance and cold resistance. After the grass decays, it can also increase fertilizer for the garden. 5. Deep ploughing of soil In late autumn and early winter from October to November, a comprehensive deep ploughing and soil improvement (excluding root discs under trees) is carried out on orchards without intercropping of crops and fruits, which is beneficial to protecting water, soil and fertilizer in the orchards and enhancing cold resistance and drought resistance.