What kind of fertilization method is used for crops is a key issue for improving fertilizer utilization and increasing crop yield. If the fertilizer is not properly applied, it will not only cause waste, but also reduce the fertilizer efficiency and reduce the income. Therefore, scientific and rational fertilization is an effective measure to improve fertilization efficiency and increase crop yield. First, organic fertilizer and chemical fertilizer combined application. The organic fertilizer has complete nutrient content and long-lasting fertilizer effect; the chemical fertilizer has a single nutrient--, but the content is high and the shell effect is fast. The combination of the two can complement each Other and improve fertilizer efficiency. According to the test, the combination of livestock manure and ammonium bicarbonate, superphosphate and potassium sulfate increased the yield by more than 10% compared with the single fertilizer. Second, the rational ratio of nitrogen, phosphorus, potassium and micro-fertilizer application is formula fertilization. It is based on factors such as the fertilization performance of different soils, the fertilizer requirement of crops and the utilization rate of fertilizers. The formula fertilization can greatly improve the fertilizer utilization rate and increase crop yield. According to the test, the urea, superphosphate and potassium chloride were applied separately, and the utilization rates were 32%, 13%, and 33%, respectively. The fertilization rate was increased to 58%, 35%, and 59%, respectively. Third, deep application of soil. If the application of nitrogen fertilizer is deep, it can effectively prevent nutrient loss and improve the utilization rate of fluorine moon. According to the test, the utilization rate of urea and ammonium bicarbonate can be more than doubled. Fourth, centralized application. For example, if the phosphate fertilizer has poor mobility in the soil, it is easy to be fixed by iron, aluminum and calcium in the soil and loses its fertilizer effect. Therefore, it should be applied to the root layer of the root system, so that the phosphorus is fixed around the seed and root system, which is beneficial to root absorption. Improve fertilizer utilization. 5. Apply the fertilizer of Yushu to the medium and low-yield fields. According to the test, 5 kg of urea and 5 kg of potassium chloride were also applied in corn high-yield fields, middle-yield fields and low-yielding fields. The effect of increasing production is not the same: on average, 1 kg of urea is added, high-yield fields increase production of 2.8 kg of corn, medium-yield fields increase yield by 5.1 kg, and low-yield fields increase yield by 7.8 kg; on average, 1 kg of potassium chloride is added, and high-yield fields increase yield of 2 kg of corn. The middle-aged field increased by 4.2 kilograms, and the low-yield field increased by 6.7 kilograms.
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