1, with or without combination. Organic fertilizers are applied in combination with inorganic fertilizers. Farmyard fertilizer is called organic fertilizer. It has complete nutrients and long-lasting fertilizer effect. Chemical fertilizer is called inorganic fertilizer. It has a single nutrient, high content, and quick results. In the agricultural fertilization technology, organic fertilizer and inorganic fertilizer must be applied in combination to complement each other and increase fertilizer efficiency. Combining human and animal manure with ammonium chloride, superphosphate, and potassium chloride can increase the yield by 10%-15% compared to the single fertilizer. 2, formula fertilization. The application of nitrogen, phosphorus, potassium and trace elements is called formula fertilization. According to the experiment, the utilization rate of nitrogen is 30%-38% for single application of urea, while the utilization rate of nitrogen is increased by 58%-60% for formula application, and the utilization rate for single application of phosphate fertilizer and phosphorus pentoxide is 12%-14%. Formula application, utilization increased by 35% -38%; single application of potassium chloride utilization of only 31% -35%, formula application, utilization increased by 57% -61%. 3, deep nitrogen fertilizer application. The deep application of nitrogen fertilizer can effectively prevent the loss of nutrients and increase the utilization of nitrogen. According to the test: ammonium bicarbonate application, nitrogen utilization rate is 28.6%, deep application, nitrogen utilization rate increased to 58.6%; urea application, nitrogen utilization rate is 42%, deep application, nitrogen utilization Increased to more than 80%, especially the application of ammonium bicarbonate, can easily cause crop burning and poisoning. 4, centralized application. The limited fertilizer is given priority to middle and low yield fields. According to the experiment, the same amount of 5 kg urea and potassium chloride are applied to three types of fields: high-yielding fields, middle-yielding fields, and low-yielding fields. The effect of increasing production varies greatly. On average, each kilogram of urea is applied, and high-yield fields increase rice production 3.5. In kilograms, middle-income fields increased rice production by 5.8 kg, and low-yielding fields increased rice production by 8.8 kg.
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