Post-harvest fertilization management of apple trees

1, base fertilizer apples should be applied immediately after fruit picking, generally in the middle and late October, using the ditch method, ditch depth 0.5-0.6 m, 3500-3900 kg organic fertilizer, mixed calcium, magnesium phosphate fertilizer 100 kg, mixed with soil After uniform application, the application of base fertilizer has the following advantages: First, the soil temperature of the main root distribution layer of apple is suitable, the root growth is large, and the absorption function is also liver, which is beneficial to root absorption after fertilization. Second, fertilization is beneficial to improve the photosynthetic efficiency of leaves and increase the accumulation of carbohydrates. Third, the application of organic fertilizer in autumn has sufficient time for roots to be absorbed and operated, and stored in the tree. Therefore, the application of fertilizer in autumn is an important part of the apple garden fertilization system and the basis for fertilization throughout the year.

2, topdressing in spring in mid-March, topdressing once, 100 kg of bio-organic fertilizer, 40 kg of silicon fertilizer, 40 kg of "Hongjie" brand fruit tree special fertilizer, 30 kg of potassium sulfate, fertilized by radiation ditch, mixed with fertilizer . In mid-June, the topdressing was carried out in mid-June. The special fertilizer of “Hongjie” brand fruit tree was 30 kg, and the potassium sulfate was 20 kg. Fertilization was carried out by radiant ditch method, and the soil was mixed and applied, and water was poured after each fertilization.

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