Phosphate fertilizer is essential for the growth and development of fruit trees . More than 60% of the soil in North China is deficient in phosphorus. It is necessary to supplement the phosphate fertilizer in the high yield of orchard, but it should be noted that: 1. Phosphate fertilizer is a slow new fertilizer, which should be mixed with base fertilizer after falling leaves in autumn. Well, in general, the orchard is planted with 250kg of mixed fertilizer and mixed with superphosphate 3-40kg . In addition, 0.4%-0.5% potassium dihydrogen phosphate can be sprayed 2- to 3 times in the middle and late stages of fruit growth to supplement the underground base fertilizer. 2. Phosphate fertilizer should be mixed with nitrogen fertilizer, which can reduce the volatilization and loss of nitrogen and reduce the fixation of phosphorus. The combination of nitrogen and phosphorus is more than a single application, and the fertilizer efficiency can be increased by 69%-73% . Nitrogen fertilizer or phosphate fertilizer alone may cause the imbalance of nitrogen and phosphorus, so that the effects of nitrogen fertilizer and phosphate fertilizer are not fully exerted. 3. Phosphorus is easily fixed in the soil. In order to exert fertilizer efficiency, phosphorus fertilizer should be mixed with organic fertilizer (circle fertilizer, horse cow dung, etc.) to reduce the chance of contact between phosphate fertilizer and soil, thereby improving the effectiveness of phosphorus and improving the efficiency. The quality of organic fertilizer. At the time of application, the two fertilizers were finely mixed and mixed and applied.
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