What are the ways to improve fertilizer use efficiency?
What methods are there to improve fertilizer use efficiency? Please explain the methods. To improve fertilizer use efficiency, you can refer to the following methods: combining organic fertilizer with inorganic fertilizer. Farmyard manure is organic fertilizer, with complete nutrients and long-lasting fertilizer effect; chemical fertilizer is inorganic fertilizer, with single nutrients, higher content, and quick effect. Combine organic...
What methods are there to improve fertilizer use efficiency? Please explain the methods.
To improve fertilizer use efficiency, you can refer to the following methods:
Combining organic fertilizer with inorganic fertilizer. Farmyard manure is organic fertilizer, with complete nutrients and long-lasting fertilizer effect; chemical fertilizer is inorganic fertilizer, with single nutrients, higher content, and quick effect. By applying organic fertilizer together with inorganic fertilizer, each makes up for the shortcomings of the other, and the fertilizer effect can be greatly improved. For example, applying human and livestock manure together with ammonium chloride, superphosphate, and potassium chloride can increase yield by 10%-15% compared with applying the same amount of fertilizer alone.
Formula fertilization. Combining nitrogen, phosphorus, potassium, and trace elements is called formula fertilization. According to experiments, when urea is applied alone, the nitrogen use efficiency is 30%-38%, while with formula application, the nitrogen use efficiency can be increased to 58%-60%; when phosphate fertilizer is applied alone, the use efficiency of phosphorus pentoxide is 12%-14%, and with formula application, the use efficiency is increased to 35%-38%; when potassium chloride is applied alone, the use efficiency is only 31%-35%, and with formula application, the use efficiency can be increased to 57%-61%.
Deep application of nitrogen fertilizer. Deep application of nitrogen chemical fertilizer can effectively prevent nutrient loss and improve nitrogen use efficiency. According to experiments: when ammonium bicarbonate is broadcast, the nitrogen use efficiency is 28.6%, and with deep application, the nitrogen use efficiency can be increased to 58.6%; when urea is broadcast, the nitrogen use efficiency is 42%, and with deep application, the nitrogen use efficiency can be increased to more than 80%.
Concentrated application. Apply limited fertilizer preferentially to medium- and low-yield fields. According to experiments: when the same amount of 5 kg of urea and potassium chloride was applied at the same time to three types of fields - high-yield fields, medium-yield fields, and low-yield fields - the yield increase effect was very different. On average, for each 1 kg of urea applied, high-yield fields increased rice yield by 3.5 kg, medium-yield fields increased rice yield by 5.8 kg, and low-yield fields increased rice yield by 8.8 kg.
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