1. There is no combination. Farmyard fertilizer is called organic fertilizer. It has complete nutrients and lasting fertilizer effect. Chemical fertilizer is called inorganic fertilizer. It has a single nutrient, high content and quick effect. 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 production by 10% to 15% compared with single fertilizer.
2. Formulated fertilization. The application of nitrogen, phosphorus, potassium and trace elements is called formula fertilization. According to the experiment, the single application of urea, nitrogen utilization rate of 30% to 38%, while the formula application, the utilization of nitrogen increased to 58% to 60%; single application of phosphate fertilizer, phosphorus pentoxide utilization rate of 12% to 14 %, the formula application, the utilization rate increased to 35% to 38%; single application of potassium chloride utilization of only 31% to 35%, formula application, the utilization rate increased to 57% to 61%.
3. Nitrogen fertilizer deep 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.
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