Pear trees have good fertilizers and require large amounts of fertilizers. When fertilizing, they should adhere to the principle of “balanced fertilization, estimated production, and increased organic fertilizersâ€. The proportion of nitrogen, phosphorus, and potassium fertilizers in a year is generally 1:0.5:1. The yield per kilogram of pears is about 19 kilograms of nitrogen fertilizer, and phosphorus and potash fertilizers are applied proportionally to achieve the production goals of “high quality, high yield, and high efficiencyâ€. The application period of topdressing has certain differences due to different varieties and tree vigor. Generally, it is carried out before germination, flowering, and fruit enlargement, and fertilization is performed using circular shallow soil. 1. Before sprouting. About 10 days before germination (March to mid-March), the roots of absorption begin to move. Successive flower buds, leaf buds, new shoots, leaf growth, flowering, and fruit setting require a large amount of protein. During this period, topdressing should be dominated by nitrogenous fertilizers, and the amount of topdressing fertilizer should be larger, and 15 to 20 kilograms of mu should be chased. 2. Fertilizer after falling. After flowering and before fruit enlargement, the pear tree is at a new shoot and grows slowly until it stops growing. The flower buds are used for the preparation of nutrition before differentiation. It is also the transition period between the old and new nutrient transfer. If the fertilizer is insufficient or not timely, it will easily cause physiological fruit drop. And affect flower bud differentiation. This period should be to apply three elements or multi-element compound fertilizer as well, mu recovery 10-13 kg. 3. Fruit enlargement and fertilizer. June-August is a period of rapid expansion of pear fruit. This period should be dominated by potash fertilizer, combined with phosphorus, nitrogen fertilizer, can increase the yield and quality of fruit, and can promote flower bud differentiation, generally acres of topdressing potassium sulfate fertilizer 12-20 kg, Phosphorus 6-8 kg, nitrogen fertilizer 5-10 kg. 4. Foliar fertilization. The orchards lacking boron, zinc, iron, etc., can be sprayed several times before germination to 0.2% borax solution, 0.2% zinc sulfate + 0.3% urea solution, or 0.3% ferrous sulfate + 0.3% urea solution. once. The absence of boron, zinc, iron orchard foliar spray fertilizer 0.2% urea solution, can be sprayed from spring to autumn, can also be combined with spraying. From the physiological fruit drop to the harvest period, spray 2-3 times with 0.3%-0.5% potassium dihydrogen phosphate solution. In order to improve the effect, it is best to spray fertilizer on sunny mornings and evenings in the absence of wind, avoid spraying fertilizer at noon to prevent heat damage. In addition, due to differences in species, geographical and climatic conditions, pay attention to the first spraying and then spraying in large areas. Tiga-Lok Open Appliers,Clip Applicator For Open Surgery,Open Appliers,Open Appliers For Sale Qingdao DMD Medical Technology Co., LTD , https://www.conston-tech.com