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普通尿素中的氮素利用率一般仅40%左右。多年来,国内外学者试图通过化学改性(如用尿素与磷酸、甲醛等生成聚合物,减缓其分解速度)与物理改性(如制成包膜肥料,以便防潮和降低分解挥发)来提高氮素利用率,但均未得到理想的效果。由于尿素转化为 NH+4-N的速度是受土壤腺酶活性控制?
Nitrogen utilization in general urea is only about 40%. Over the years, domestic and foreign scholars have tried to improve chemical modification (such as the use of urea and phosphoric acid, formaldehyde and other polymers to slow down the rate of decomposition) and physical modification (such as made of coated fertilizer to prevent moisture and reduce decomposition volatilization) Nitrogen utilization, but none of the desired results. Since the rate of conversion of urea to NH + 4-N is controlled by soil gland enzyme activity?