Rice Soil Testing and Formula Fertilization Technology
First, technology introduction
According to the characteristics of fertilizers required for main crops and formula fertilization techniques, soil testing and formula fertilization mainly include three principles: first, the combination of organic and inorganic fertilizers; second, the combination of large, medium, and trace elements; and third, land use and land use. In combination, input and output are balanced. The methods for determining the amount of fertilizer include soil and plant test recommended fertilization method, fertilizer effect function method, soil nutrient abundance index method and nutrient balance method.
Second, the operating procedures
In medium fertility fields, the formula for fertilizing 460 to 510 kilograms of rice for soil testing is as follows:
(I) Total amount and ratio of fertilizer application
Nitrogen fertilization: phosphorus: potassium is about 1:0.5:0.8, the total urea is about 13 to 15 kg; phosphorus pentoxide is 6 to 8 kg; potassium oxide is 9 to 13 kg.
(II) Fertilization plan
1, base fertilizer
(1) Organic manure applies 1,000 to 1600 kilograms of fresh green manure or 800 to 1400 kilograms of farmyard manure per acre.
(2) 35 to 40 kg of fertilizer for rice, 40 to 50 kg of superphosphate, 5 to 7 kg of potassium sulfate, and 2 kg of zinc sulfate.
2, top dressing
(1) Mushi urea fertilizer 8 to 10 kg, potassium sulfate 2 to 3 kg;
(2) Fertilizer Mushi urea 5 ~ 6 kg, potassium sulfate 4 ~ 5 kg;
(3) The planting fertilizer Mushi urea 0.7 kilograms plus potassium dihydrogen phosphate 0.2 kilogram watered 50 kilograms spray to prevent premature aging.
Third, the conclusion
The use of soil testing and formula fertilization technology greatly reduces production costs, increases yields, and increases total production.
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