1. Application of organic fertilizer mixed stack after fermentation
Organic fertilizer is rich in organic matter, phosphoric acid and a variety of organic weak acids, which can make insoluble phosphorus into soluble phosphorus. At the same time, the combination of organic fertilizer and phosphate fertilizer can greatly reduce the contact surface between phosphate fertilizer and soil, thus reducing the soil's fixation of phosphorus. Therefore, by fertilizing and fertilizing organic fertilizer, the utilization rate of phosphate fertilizer can be greatly improved, and the problem of phosphate fertilizer burning can be effectively overcome.
Stacking method: half a month before application, mix 1 part of phosphate fertilizer with 10-20 parts of organic fertilizer, pile up well, and seal with mud outside.
2. Combined with nitrogen, potassium and zinc fertilizers
According to the requirements of nitrogen, phosphorus, potassium and zinc in wheat, the application of nitrogen fertilizer, potassium fertilizer and zinc fertilizer in scientific application can not only effectively supplement the soil nutrient deficiency, but also increase the utilization rate of phosphate fertilizer 20-30. %. The ratio of its application: general high-yield wheat field, 4000 kg of high-quality organic fertilizer per mu, 50 kg of standard phosphate fertilizer, 30 kg of standard nitrogen fertilizer, 12 kg of standard potassium fertilizer, 1.5 kg of zinc sulfate in the zinc-deficient plot; 3000 kg of high-quality organic fertilizer, 50 kg of standard phosphate fertilizer, 35 kg of standard nitrogen fertilizer, 8 kg of standard potassium fertilizer and 1 kg of zinc sulfate are suitable.
Third, centralized application
The concentrated application of phosphate fertilizer can reduce the contact surface between phosphate fertilizer and soil, reduce the fixation of phosphorus in soil and improve the utilization rate. Phosphate fertilizer concentrates can increase the utilization rate by 28% and increase the yield of wheat by about 12%.
Method for applying phosphorus fertilizer to wheat
Fourth, due to soil selection of phosphate fertilizer
Water-soluble superphosphate should be used on neutral and calcareous alkaline soils. Calcium superphosphate is weakly acidic and can neutralize alkali in the soil; on acidic soil, weakly alkaline calcium magnesium phosphate should be used. The application of alkaline fertilizer in acid soil can not only enhance its fertilizer efficiency, but also neutralize the acid in the soil and avoid the harm of acid to wheat roots.
Fifth, the amount should be appropriate
The increase in the yield of wheat per kg of phosphate fertilizer decreases with the increase of the amount of phosphate fertilizer. However, when the dosage is too small, the yield per unit area is not significant. Generally, the application rate of 50-60 kg is suitable.
Six, foliar spray
2-3 kg of superphosphate is evaporated with water, the residue is filtered off, and 50-60 kg of water is mixed, and sprayed once in wheat jointing, booting and filling, which can increase yield by 4-6%. Or foliar spray 0.2% potassium dihydrogen phosphate solution, spray 60-80 kg per acre, spray three times, there is obvious strong stalk anti-falling effect.
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