In the apple orchard fertilization, according to the law of fruit tree growth, early application is recommended, and September-October is the best. At this time, the temperature is high and the humidity is high. After fertilization, the root healing and the decomposing of the organic fertilizer are facilitated. The whole garden fertilization should be one meter away from the trunk, and the depth is about 50 cm. The type of base fertilizer is mainly based on farmyard manure. The amount of fertilizer applied is calculated according to 1.5-2 kg per 1 kg of fruit produced. 4,000-5000 kg of organic fertilizer is usually applied per mu , and 40 kg of diammonium phosphate and 200 kg of ash are suitable. The method of fertilization varies from garden to garden. For dense planting, it can be carried out by intervening fertilization. In the next year, fertilization is carried out in the unapplied line, which saves labor and labor. For thin plantations and young trees, ring fertilization or radial ditch fertilization can be used. Usually, fertilization can be carried out in combination with deep reforming of the orchard. Apple trees are different from field crops. The root soil nutrients are absorbed by the roots over the years, the nutrition is very incomplete, and the soil compaction is serious. The root growth environment can be improved by deep turning and fertilization.
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