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First, the soil temperature of the main roots of apple is more suitable, the root growth is large, and the absorption function is also more lively. After fertilization, it is beneficial to root absorption. 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.
Second, the topdressing spring in March in the first half of the top dressing, bio-organic fertilizer 100 kg, 40 kg of silicon fertilizer, "Hongjie" brand fruit tree special fertilizer 40 kg, potassium sulfate 30 kg, using radiation ditch method fertilization, fertilizer soil mixing In. 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.
Huaxian County Liu Xiuling
Post-harvest fertilization management of apple trees
First, the base fertilizer apples should be applied immediately after harvesting the fruit, generally in the middle and late October, using the ditch method, the ditch depth is 0.5-0.6 m, 3500-3900 kg of organic fertilizer per mu, mixed with calcium and magnesium phosphate 100 kg, After being mixed with the soil and applied, the base fertilizer has the following benefits:
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