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Citrus winter fertilizer must read
After the “early winter†has passed, the harvesting of citrus fruits is completed, and the timely application of good winter fertilizers is of great significance to the healthy reproduction of citrus trees to ensure stable production, high quality and high yield. Winter fertilizer after fruit picking is also a citrus base fertilizer, and the amount of fertilizer should account for 50%-70% of the total annual fertilization amount. Shi Dongfei meaning: (1) The citrus plant consumes too much nutrients after harvest and needs to be supplemented. (2) The organic fertilizer applied to soil slowly decomposes under the action of microorganisms, which is conducive to the gradual growth of citrus growth in the winter and the weakening of the root absorption capacity. It gradually absorbs and uses more organic nutrients in the tree body. The need for budding and flowering in the coming spring. (3) The collected orange trees can be restored as soon as possible. (4) It has a good leaf protection function, prolongs the life of the leaf, and prevents citrus winter deciduous. (5) It is conducive to stable production and high quality of citrus trees. (6) greatly enhance the antifreeze and drought resistance of orange trees. Shi Dong Fei should be dominated by organic fertilizers. Each adult orange tree should be rotted with 100-200 pounds of manure, 100-200 pounds of turf, 3 pounds of cake fertilizer, 4 pounds of phosphate fertilizer, 3 pounds of potassium fertilizer, and 3-4 lime. Jin, can also be applied in the organic fertilizer of crop stalks, garbage, pond mud, etc., apply 3 pounds of cooked beans, 3 pounds of dried cake, 3 pounds of phosphate fertilizer, 1 pound of urea, 3-4 pounds of lime. Fertilization methods: (1) Excavate arcs or ring deep trenches along the crown, the depth of the trench is about 50 centimeters. The width of the trench depends on the amount of fertilizer, and the roots of the excavation will be cut. During the trenching process, the surface layer and subsoil should be stacked separately, and organic manure such as manure, turf, and dried cakes should be applied to the lower layer, and nitrogen fertilizer should be placed on the upper layer. If the leaves have a dark green color or a large amount of fruit, the phosphorus and potassium fertilizers should be properly increased. The declining tree should increase the available nitrogen fertilizer appropriately. In the flat ditch, the more fertile topsoil was firstly introduced and the subsoil was filled in the surface. (2) Radial trench fertilization. According to the size of the canopy, 4-6 arc-shaped sulci were opened in the direction of horizontal root growth. The sulcus was shallower near the trunk and deeper toward the canopy projection. Using this method, the fertilizer distribution surface is wider than that of the ring-shaped groove, and it is possible to change the fertilization site, enlarge the fertilization surface, and promote root absorption every other year, which is particularly suitable for adult citrus orchards. The application time of winter fertilizer was finished at the latest in mid-December. Between the freezing season, it is best to carry out twice top-dressing, 0.4% urea and 0.3% potassium dihydrogen phosphate.