1. In the application period, the soil and loam soil which are relatively lack of phosphorus and potassium in the soil can be applied to the bottom of the soil during the preparation of the soil, and soaked with potassium dihydrogen phosphate solution before sowing. The peak of wheat tillering, the rejuvenation period, and the jointing stage At the booting stage and the filling stage, potassium dihydrogen phosphate is applied, which must be applied during the filling period. Medium and sticky soils with high phosphorus and potassium contents can be soaked with potassium dihydrogen phosphate solution and applied in the jointing stage, booting stage and filling stage.
Second, the application concentration (a) base application. Potassium dihydrogen phosphate is used as the base fertilizer, and it is suitable for 8-10 kg per mu. With the application of 25 kg of urea, the balance of nitrogen, phosphorus and potassium can be achieved. (2) Soaking seeds. 200 g of potassium dihydrogen phosphate can be used per mu. (3) Foliar spraying. 300-700 grams per acre, 40-60 kilograms of water, and a spray concentration of 0.8% to 1%.
Third, the application method Bottom fertilizer, should be mixed with potassium dihydrogen phosphate and fine soil, evenly spread when ploughing, or mix it with nitrogen fertilizer, after application, simmer. Soaking seeds should be stirred according to the amount of potassium dihydrogen phosphate required, so that the liquid level in the container is 5 cm higher than the seeds, soaked for 10 hours, and then sown after being dried. For foliar spraying, the good potassium dihydrogen phosphate solution should be evenly sprayed on the foliage before 10 am or after 4 pm in the windless and sunny weather.
Source of information: Henan Science and Technology News
Second, the application concentration (a) base application. Potassium dihydrogen phosphate is used as the base fertilizer, and it is suitable for 8-10 kg per mu. With the application of 25 kg of urea, the balance of nitrogen, phosphorus and potassium can be achieved. (2) Soaking seeds. 200 g of potassium dihydrogen phosphate can be used per mu. (3) Foliar spraying. 300-700 grams per acre, 40-60 kilograms of water, and a spray concentration of 0.8% to 1%.
Third, the application method Bottom fertilizer, should be mixed with potassium dihydrogen phosphate and fine soil, evenly spread when ploughing, or mix it with nitrogen fertilizer, after application, simmer. Soaking seeds should be stirred according to the amount of potassium dihydrogen phosphate required, so that the liquid level in the container is 5 cm higher than the seeds, soaked for 10 hours, and then sown after being dried. For foliar spraying, the good potassium dihydrogen phosphate solution should be evenly sprayed on the foliage before 10 am or after 4 pm in the windless and sunny weather.
Source of information: Henan Science and Technology News
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