Key points of applying phosphorus Fertilizer in Orchard

Phosphate fertilizer is essential for the growth and development of fruit trees. More than 60% of the soils in North China are deficient in phosphorus. In order to achieve high yield in orchards, it is necessary to apply phosphate fertilizer, but attention should be paid to: 1. Phosphate fertilizer is a kind of slow new fertilizer, which should be mixed with base fertilizer after defoliation in autumn. in general, soil miscellaneous fertilizer 250kg and calcium superphosphate 3--4kg are mixed in orchards. In addition, 0.4% muryl 0.5% potassium dihydrogen phosphate and 2murine can be sprayed three times in the middle and later stages of fruit tree growth as a supplement to underground base fertilizer. two。 Phosphate fertilizer should be mixed with nitrogen fertilizer, which can not only reduce the volatilization and loss of nitrogen, but also reduce the fixation of phosphorus. Compared with the single application of nitrogen and phosphorus, the fertilizer efficiency can be increased by 69% Murray 73%. The application of nitrogen fertilizer or phosphate fertilizer alone is easy to cause the imbalance of nitrogen and phosphorus ratio, so that the effects of nitrogen fertilizer and phosphate fertilizer can not be brought into full play. 3. Phosphorus is easy to be fixed in soil. in order to exert fertilizer effect, phosphate fertilizer should be mixed with organic fertilizer (ring fertilizer, horse and cow manure, etc.) to reduce the chance of contact between phosphate fertilizer and soil, so as to improve the availability of phosphorus and improve the quality of organic fertilizer. When applying, mash the two kinds of fertilizers and mix them well.