1. There is no combination. Organic fertilizers are applied in combination with inorganic fertilizers. Farm manure is called organic fertilizer. It has complete nutrients and long-lasting fertilizer. Chemical fertilizer is called inorganic fertilizer. It has a single nutrient, high content and quick effect. In the agricultural fertilization technology, both organic fertilizer and inorganic fertilizer must be applied together to complement each other and improve fertilizer efficiency. The combination of human and animal manure with ammonium chloride, superphosphate and potassium chloride increases the yield by 10%-15% compared with the same amount of fertilizer.
2, formula fertilization. The application of nitrogen, phosphorus, potassium and trace elements is called formula fertilization. According to the test, the nitrogen utilization rate of single application of urea is 30% -38%, while the formula application, the utilization rate of nitrogen is increased by 58%-60%, and the utilization rate of single application of phosphorus fertilizer and phosphorus pentoxide is 12%-14%. For formula application, the utilization rate is increased by 35%-38%; the utilization rate of potassium chloride alone is only 31%-35%, and the application rate is increased by 57%-61%.
3. Deep application of nitrogen fertilizer. The deep application of nitrogen fertilizer can effectively prevent nutrient loss and increase nitrogen utilization rate. According to the test: the ammonium bicarbonate is applied, the nitrogen utilization rate is 28.6%, and the deep application, the nitrogen utilization rate is increased to 58.6%; the urea application, the nitrogen utilization rate is 42%, the deep application, the nitrogen utilization rate Increase to more than 80%, especially the application of ammonium bicarbonate, it is easy to cause crop burning and poisoning.
4. Centralized application. Give limited fertilizer priority to low- and medium-yield fields. According to the test: the same amount of 5 kg of urea and potassium chloride are applied to the fields of high-yield, middle-yield and low-yield fields at the same time. The effect of increasing yield is very different. On average, 1 kg of urea is applied, and high-yield fields increase rice yield 3.5. In kilograms, the middle-income field increased the yield of rice by 5.8 kg, and the low-yield field increased the yield of rice by 8.8 kg.
2, formula fertilization. The application of nitrogen, phosphorus, potassium and trace elements is called formula fertilization. According to the test, the nitrogen utilization rate of single application of urea is 30% -38%, while the formula application, the utilization rate of nitrogen is increased by 58%-60%, and the utilization rate of single application of phosphorus fertilizer and phosphorus pentoxide is 12%-14%. For formula application, the utilization rate is increased by 35%-38%; the utilization rate of potassium chloride alone is only 31%-35%, and the application rate is increased by 57%-61%.
3. Deep application of nitrogen fertilizer. The deep application of nitrogen fertilizer can effectively prevent nutrient loss and increase nitrogen utilization rate. According to the test: the ammonium bicarbonate is applied, the nitrogen utilization rate is 28.6%, and the deep application, the nitrogen utilization rate is increased to 58.6%; the urea application, the nitrogen utilization rate is 42%, the deep application, the nitrogen utilization rate Increase to more than 80%, especially the application of ammonium bicarbonate, it is easy to cause crop burning and poisoning.
4. Centralized application. Give limited fertilizer priority to low- and medium-yield fields. According to the test: the same amount of 5 kg of urea and potassium chloride are applied to the fields of high-yield, middle-yield and low-yield fields at the same time. The effect of increasing yield is very different. On average, 1 kg of urea is applied, and high-yield fields increase rice yield 3.5. In kilograms, the middle-income field increased the yield of rice by 5.8 kg, and the low-yield field increased the yield of rice by 8.8 kg.
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