(1) Mixing with organic fertilizer and applying after fermentation. Organic fertilizer is rich in organic matter, carbonic acid and a variety of organic weak acids, which can make insoluble phosphorus into soluble phosphorus. At the same time, when the organic fertilizer is mixed with the phosphate fertilizer, the contact surface of the phosphate fertilizer and the soil can be greatly reduced, thereby reducing the fixation of the soil to phosphorus. Stacking method: In the half month before application, mix 1 to 6 parts of phosphate fertilizer and mix 10 to 20 parts of organic fertilizer, then pile up well, and seal it with mud to prevent loss of fertilizer efficiency. According Zhucheng test: After mixing calcium phosphate and organic fertilizer is applied into the retting fermentation of wheat fields, wheat fields than administered directly into, increase fertilizer efficiency of 23.1%.
(2) Combined with nitrogen fertilizer, potassium fertilizer and zinc fertilizer. According to the nitrogen, phosphorus, potassium, zinc and other nutrient requirements of wheat , when applying phosphate fertilizer, the scientific formula of nitrogen fertilizer, phosphate fertilizer, potassium fertilizer and zinc fertilizer can not only effectively supplement the soil nutrient deficiency, but also improve the utilization rate of phosphate fertilizer. 20 to 30 %. Its formula application ratio: generally 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 organic fertilizers, fertilizer 50 kg standard, the standard 35 kg of nitrogen, potash standard 8 kg, preferably 1 kg of zinc sulfate.
(3) Adopting a centralized application method. The concentrated application of phosphate fertilizer can effectively reduce the contact surface with the soil, thus reducing the effective phosphorus in the phosphate fertilizer by the calcium, magnesium, iron, aluminum and other elements in the soil. Especially in all kinds of clayey soil yellow soil, red soil, lime soil, yellow soil, sand ginger and other black soil sprinkled P fertilizer, soil more easily fixed. Studies have shown that the application of phosphorus fertilizer concentrates can increase the utilization rate by 28 %, and the yield of wheat can increase by 11.8 %. Method of application: Before planting wheat, according to the planting row spacing, firstly use a planter to apply the phosphate fertilizer 8 to 10 cm deep , and then plant it with a second planter to make the wheat seeds and phosphate fertilizer staggered by 1 to 2 cm to prevent damage. bud.
(4) Phosphate fertilizer should be used due to soil system. In order to improve the utilization rate of phosphate fertilizer, phosphate fertilizer should be used for soil. On neutral and calcareous alkaline soils, water-soluble superphosphate is used. Calcium superphosphate is weakly acidic and can neutralize alkali in soil. Weakly alkaline calcium magnesium phosphate is used on acidic soil. Alkaline fertilizer can not only enhance its fertilizer efficiency, but also neutralize the acid in the soil and avoid the harm of acid to wheat roots.
(5) The amount of phosphate fertilizer should be appropriate. According to the test results of phosphate fertilizer in the moderately fertile wheat field in Changle County, the increase in the number of wheat per kg of standard phosphate fertilizer decreased with the increase of the amount of phosphate fertilizer. However, when the dosage was too small, the yield per unit area was not significant, and 55 kg per mu was applied. The yield increase is best. Generally, the application rate of the wheat field is preferably 50 to 60 kg.
(6) Spraying on the outer leaves of the roots. Booting and filling stage to the jointing stage, the SSP 2 to 3 kg of water was added to open, the residue was filtered off, into the water to mix 50 to 60 kg, the spray and a jointing wheat during booting, can yield 4 ~ 6 %. Or the outer root spraying 0.2% potassium dihydrogen phosphate solution per acre spraying 60 to 80 kg, three spraying, strong stem significant anti-down effect, can yield 4.6 to 8.1%. To select extraradical spraying after 3 p.m. when no wind sunny or cloudy, the wheat plants with a sprayer aligned "pages of a button, surrounded by playing through" spraying method, front and back surfaces of the blades uniformly plant fertilizer solution on the dip .
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