The benefits of current fertilization. 1. Conducive to the timely recovery of fruit tree growth; 2. Conducive to the timely healing of the roots and the production of a large number of new roots, thereby increasing the absorption capacity of the tree and the amount of nutrients stored in the tree; 3. Conducive to the safe wintering of the tree The timely supply of nutrients needed for tree growth in the coming year. To lay a good foundation for fruit trees in the coming year.
Fertilization type. The types of base fertilizers in autumn mainly include organic fertilizers, compound fertilizers and soil conditioners.
Nitrogen, phosphorus and potassium ratio. The apple orchard saplings need nitrogen-phosphorus combination, and the suitable ratio of nitrogen and phosphorus is 1:1. The initial results tree should be added with potassium fertilizer on the basis of nitrogen and phosphorus. The suitable ratio of nitrogen, phosphorus and potassium is 1:0.5:1; The tree should be appropriately reduced in the amount of phosphorus and potassium, and the suitable ratio of NPK is 1:0.4:0.8.
The amount of fertilizer applied. The tree that enters the fruiting period is mainly produced with high-quality and high-quality fruits. 4kg~6kg of high-quality organic fertilizer is used for every 100kg of fruit. On this basis, NPK should be carried out at 1:0.4:0.8, and pure nitrogen should be used from 0.6kg to 0.7kg. Silicone calcium magnesium 75kg~100kg is required per acre.
Fertilization method. High-density gardens and older orchards can be used to ditch along the line. Generally, the outer edge of the fruit tree canopy is vertically projected to a width of 40 cm and a depth of 30 cm to 40 cm. It can also be trenched between plants, with the same width and depth, and the length is the diameter of the crown. After fertilization, mix the fertilizer with the topsoil and mix it back, then backfill it, and then cover the new soil. Orchards with lower density can also be treated with annular ditch and grooved fertilization.
Precautions. 1. Fruit tree autumn application base fertilizer is generally used in the middle and late ripe varieties before and after fruit picking, should not be late. 2. Pay attention to the fertilization method: no matter whether it is a circular ditch application, a radiation ditch application or a strip-shaped ditch application, or a whole garden application, it is impossible to make the fertilizer into a mass, and the fermented organic fertilizer, chemical fertilizer, etc. should be made with the rhizosphere. The soil is well mixed and the fertilizer is dispersed and ventilated. Otherwise, the local concentration of the soil is too high, which may cause burning. 3. Pay attention to the protection of the root system: pay attention to the protection of the root system, especially to protect the fine roots growing on the lateral roots of each level. After the large roots exposed by the ditch are turned over, they should be fully stretched and buried in the loose soil, and then buried with the burial, to prevent the long-term wind and sun drying the roots. At the same time, the roots should be trimmed to facilitate early healing. 4. Pay attention to the application of organic fertilizer, organic fertilizer must be decomposed, otherwise it will cause fruit tree disease. 5. Pay attention to the appropriate amount of micro-fertilizer. The commonly used micro-fertilizers have the effects of simultaneous application of ferrous sulfate, zinc sulfate and borax with organic fertilizer. 6. Pay attention to the acidity and alkalinity of fertilizers. Acidic fertilizers and alkaline fertilizers cannot be applied at the same time. It is not appropriate to mix a large amount of ash and human excrement. Acidic fertilizer should be applied in alkaline soil, such as ammonium sulfate, calcium superphosphate, ammonium chloride, potassium chloride, potassium sulfate, etc.; alkaline fertilizer should be applied in acidic soil, such as plant ash, lime nitrogen, calcium magnesium phosphate fertilizer, etc. .
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