Orchard fertilization should be dominated by basal fertilizer supplemented by topdressing, and timely and rationally applied according to characteristics of fertilizers and characteristics of different growth stages of fruit trees. First, determine the appropriate fertilization period. 1, base fertilizer Yiqiu Shi: Orchard timely application of basal fertilizer, not only can improve the soil, stable yield and high yield, but also allows fruit trees to grow robustly, enhance fruit resistance. The best results were obtained when the fruit was harvested. Because autumn basal fertilization is the third highest peak of fruit tree roots, the roots of digging and digging holes are the most likely to heal, and can give rise to new roots, which is beneficial to the recovery of the root system. When autumn basal fertilizer is used, the root system absorbs water and has strong fertility. , increase nutrient in the tree body, increase the concentration of tissue cells, help fruit trees resist cold and overwinter; autumn base fertilizer is conducive to decomposition and transformation of organic fertilizers in winter and spring and continuous release of nutrients, timely supply of flower bud differentiation of fruit trees; autumn base fertilizer, can increase the fruit set of the tree rate. 2. Top dressing is applied on demand: If urea is sprayed before flowering of apple trees and after three weeks of blooming, the growth and development of flowering, fruit setting and shoots and leaves can be promoted; potassium dihydrogen phosphate can be used to increase shoot buds during flower bud differentiation of fruit trees. C/N is very favorable for flower bud differentiation; spraying potassium dihydrogen phosphate at the late stage of fruit growth can improve fruit quality and increase sugar content and coloration of fruit. Second, choose a reasonable fertilizer ratio Organic fertilizers should be used mainly, with the application of available nitrogen, phosphorus, and potassium fertilizers, organic fertilizers should account for 95% of the total amount of fertilizers. In the past few years, trace element deficiency syndrome should be applied in a targeted manner. Organic fertilizer should be compost, manure, waste fertilizer, humic acid fertilizer, green manure, straw, melon vines, grass, but also can be properly mixed with human excreta, plant ash and so on. It is worth noting that fertilizers are rich in nutrients and have high effective nutrients. They should be mixed well before they are applied. After fertilization, they should be timely covered with soil. Third, the use of scientific methods of fertilization 1, ring groove fertilization method. A 30-40 cm wide, 15-45 cm deep ring ditch is excavated around the canopy, and the topsoil is mixed with the base fertilizer. This method is suitable for young orchards. 2, radial fertilization method. At a distance of 1 meter from the trunk, dig 6-8 radial trenches, 30-60 cm wide and 15-45 cm deep, and the length of the trunk reaches the outer edge of the trunk. Apply the fertilizer to the trench and cover it with soil. This method is suitable for mature orchards. 3, strip groove fertilization method. Between fruit trees or between trees, dig 1-2 long grooves 50 centimeters wide and 40-50 centimeters deep, and fertilize the soil. This method is suitable for mature orchards. 4, points cast method. Under a tree 1 meter in diameter, dig evenly 10-20 deep 40-50 centimeters, 30 centimeters in the upper mouth and 10 centimeters in the base. Fill dead and rotten leaves in the hole and cover it with plastic cloth. Top dressing and watering are all inside the hole. This method is applicable to sand orchards with poor fertility and water conservation. 5, soil drilling method. Drill the drill under the canopy and pour the diluted fertilizer into the hole to let the fertilizer slowly infiltrate. This method is suitable for mature orchards in orchards and arid areas in densely populated areas. 6, the whole fertilization method. Spread the fertilizer evenly throughout the garden, turn the fertilizer into the soil, and use a depth of 25 cm. This method is applicable to mature trees or dense planting orchards in the roots of Manyuanyuan. 7, with water fertilizer method. In sap-covered saplings, the fertilizer can be dissolved in water and then applied with irrigation water. 8, intercropping fertilization method. In the fruit trees, intercropping plants such as red peony, pea, yellow flower, alfalfa, broad bean, mung bean, soybean, etc., can be deep-pressed green at a proper time, which can increase soil organic matter. This method has a good effect on young or mature orchards. 9, root (foliar) fertilization method. When the fruit trees are found to have mild symptoms of malnutrition, the tree body can be sprayed with liquid fertilizer. The concentration of spray liquid fertilizer is determined according to the species, age, growth period, and fertilizer type. Generally, the spray is sprayed 2-3 times, each time between 7-10. day. 10, trunk drilling fertilization method. Three deep holes are drilled into the base of the tree trunk, and the fertilizer required by the fruit trees is directly injected into the tree body with a high-pressure injection machine. This method is suitable for the application of medicinal fertilizers or the correction of deferrifying iron deficiency in fruit trees. 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