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据试验,氮素化肥利用率一般只有30～50％,因为水溶性氮肥施到土壤中后,常常由于流失、挥发或反硝化作用等原因而损失。如何最大限度
According to the test, nitrogen fertilizer use rate is generally only 30 to 50%, because water-soluble nitrogen fertilizer applied to the soil, often due to loss, volatilization or denitrification and other reasons and loss. How to maximize