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利用不同类型和不同氮素水平的控释掺混肥与普通复合肥进行对比试验,研究了不同施氮水平对大田小麦产量、氮素利用率和土壤氮平衡的影响。结果表明,控释掺混肥既能够显著提高小麦产量和氮素利用率,又明显减少了氮素损失量,以比常规施氮量减少20%、控氮比75%的控释掺混肥(CRF4)效果最显著,产量增加10.08%,氮素利用率提高15.23百分点,氮素损失量减少75.26 kg/hm2。
Controlled-release fertilizers with different types and different nitrogen levels were compared with conventional compound fertilizers to study the effects of different nitrogen application rates on the yield, nitrogen use efficiency and soil nitrogen balance in field. The results showed that the controlled release fertilizer could both significantly increase wheat yield and nitrogen use efficiency, and significantly reduce the amount of nitrogen loss, compared with the conventional nitrogen application rate of 20%, 75% (CRF4) had the most significant effect. The yield increased by 10.08%, the nitrogen utilization rate increased by 15.23%, and the nitrogen loss decreased by 75.26 kg / hm2.