First, the combination of organic and inorganic. That is, organic fertilizer is applied in combination with inorganic fertilizer. The farmyard manure is organic fertilizer, which has complete nutrients and long-lasting fertilizer effect; chemical fertilizer is inorganic fertilizer, which has a single nutrient, high content and quick effect. The application of organic fertilizer and inorganic fertilizer can be combined and supplemented, and the fertilizer effect can be greatly improved. If the human and animal manure is combined with ammonium chloride, superphosphate and potassium chloride, it can increase the yield by 10%~15% compared with the single application of the same amount of fertilizer.
Second, formula fertilization. The application of nitrogen, phosphorus, potassium and trace elements is called formula fertilization. According to the test, the utilization rate of nitrogen is 30%~38% for single application of urea, and the utilization rate of nitrogen can be increased to 58%~60% by formula application; the utilization rate of single application of phosphate fertilizer and phosphorus pentoxide is 12%~ 14%, the application of formula, the utilization rate increased to 35% ~ 38%; the utilization rate of single potassium chloride is only 31% ~ 35%, the application of formula, the utilization rate can be increased to 57% ~ 61%.
Third, 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 can be increased to 58.6%; the urea application, the nitrogen utilization rate is 42%, deep application, nitrogen utilization The rate can be increased to over 80%.
Fourth, 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 yield increase effect is very different. On average, 1 kg of urea is applied, and high-yield fields increase the yield of rice. 3.5 kilograms, the middle-yield field increased rice yield by 5.8 kilograms, and the low-yield field increased rice yield by 8.8 kilograms.
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