The young roots of loquat are underdeveloped, and the absorption fertility is poor, especially deep phosphate fertilizer, which cannot be absorbed. The ratio of nitrogen, phosphorus and potassium is 1: 0.58: 0.63. Results The ratio of nitrogen, phosphorus and potassium was 1∶0.75∶0.8, and there was relatively more nitrogen fertilizer. Loquat is rich in calcium, so lime or calcium superphosphate should be applied to acidic soil. Loquat is suitable for loose soil with high organic matter content, and more manure or green manure should be applied. Adult trees are fertilized three times a year. (1) Spring fertilizer was applied from late October to mid-February at 65438+/kloc-0, and some fertilizers were delayed until the middle and late March after fruit thinning. Its function is to promote the germination and growth of spring shoots and young fruits, and the annual fertilization amount is 1/3 ~ 1/4. (2) Summer fertilizer, before fruit harvesting 1 week, before flower bud physiological differentiation, from April to May, can promote summer shoots to sprout vigorously and flower buds to differentiate well, accounting for about 50% of the annual fertilization. Combined application of organic fertilizer and chemical fertilizer, the ratio of nitrogen, phosphorus and potassium is 3∶2∶2. (3) From late August to mid-late September, the flower bud differentiation ends and the branches stop growing, which can promote the inflorescence to fully expand, blossom and bear fruit well, and improve the cold tolerance, accounting for 65,438+0/3 ~ 65,438+0/4 of the annual topdressing amount, with late-acting fertilizer and cake fertilizer as the main components, and the ratio of nitrogen, phosphorus and potassium is 4. The annual fertilization rate of potted mature loquat is 0. 15 ~ 0.3 kg of nitrogen, 0. 1 ~ 0.2 kg of phosphorus and 0. 13 ~ 0.2 kg of potassium. Calcium, iron and zinc fertilizers and a small amount of trace fertilizers such as boron and molybdenum should be supplemented. In addition to normal watering, potted loquat should be watered once after topdressing, and the necessary fertilizer should be added when changing pots. Pay attention to drainage in rainy season, and pay attention to intertillage weeding from June to September.