Phosphate fertilizer application

Deep application of phosphorus is easily fixed by calcium, magnesium, iron, and aluminum in the soil, and its mobility is small. Therefore, phosphorus fertilizer should be applied deep in the vicinity of the crop roots, which can increase the chance of contact between the phosphate fertilizer and the root system, which is beneficial to crop absorption and reduction. Weed consumption increases utilization. Can be used seed dressing, bar Shi, acupuncture, etc., the effect is very good.
Early application of phosphate fertilizer as a base fertilizer should be applied early, because the critical period of crop phosphorus is seedling period. There is no lack of phosphorus at the seedling stage, and there are few symptoms of phosphorus deficiency in the middle and late stages of crop growth. Therefore, the effect of phosphate fertilizer as a base fertilizer is good.
Mixed application of phosphate fertilizers and high-quality manure or stacks of organic fertilizers will make it possible to convert insoluble phosphates into effective phosphorus that can be used by crops. At the same time, due to the stacking of phosphate fertilizers and organic fertilizers, soil is reduced. Direct contact can reduce the fixation of phosphorus, improve fertilizer efficiency.
It is not appropriate to apply phosphate fertilizer alone, but it is best to use with nitrogen fertilizer. The application of nitrogen, phosphorus, and potassium in proportion to the increase in production and production efficiency is better than that of any single application. The ratio of nitrogen, phosphorus and potassium is generally 1:0.4:1.2. It is appropriate to use phosphate fertilizer with good effect, and the basic application can be used once. The tube is 2 to 3 inches. Therefore, it is not necessary to apply phosphate fertilizer to every crop. Generally, it can be applied once every two to two years. At the same time, the appropriate amount should be calculated based on the target crop yield and soil fertility of different crops, taking into account the balance of nitrogen, phosphorus and potassium.
Extra-root topdressing crops were treated with extraphosphates for extra-root fertilizer before and after flowering. The roots of the crops grew later and the roots were aged. The ability to absorb nutrients was weakened, often resulting in defertilization. When sprayed with water-soluble phosphate fertilizers, the spray rate was 0.5 to 2%. The time should be morning or evening.
Phosphate fertilizer due to soil, that is, superphosphate is an acidic fertilizer, suitable for neutral, alkaline soil application, calcium magnesium phosphate is best used in the acidic soil.
Phosphorus fertilizers are the most suitable for crops that are particularly sensitive to phosphorus, and they are mainly used in legumes, cotton, wheat, potatoes, and melons, with good economic returns. In addition, the use of phosphate fertilizers should be centralized, and it is precisely this meaning that “a large amount of fertilization is not as good as a long line”.
Can not be mixed with alkaline fertilizer plant ash, lime, etc. are all strong alkaline substances, if mixed application, will significantly reduce the effectiveness of phosphate fertilizer, phosphorus production increase, generally should be staggered 7-10 days.

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