控释掺混肥对小麦产量、氮素利用率及土壤氮平衡的影响

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。

Effects of controlled release bulk blend fertilizer on the yield of wheat,nitrogen utilization rate and N balance of soil

The contrast tests of fertilizer efficiency between common compound fertilizer and controlled release bulk blended fertilizer with different types and different nitrogen levels are carried out, the effects of different fertilizer treatments on yield of wheat in field and nitrogen utilization rate and N balance of soil are studied. The results show that, the controlled release bulk blended fertilizers both can significantly improve the yield of wheat and nitrogen utilization rate, and significantly reduce nitrogen loss. The controlled-release bulk blended fertilizer with the amount of N fertilizer reduced by 20% and controlled nitrogen ratio of 75% （CRF4） increase the yield of wheat by 10.08%, improve nitrogen utilization rate by 15.23 percentage point, reduce the N loss by 75.26 kg/hm^2, its effect is the best.