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以豫农202为材料,在大田条件下,研究氮锌配施对冬小麦不同生育时期氮吸收的影响,并探讨氮锌配施对冬小麦氮素利用率、产量以及籽粒蛋白质含量的影响。结果显示:氮锌配施能够促进冬小麦对氮素的吸收,与单施氮肥相比,氮锌配施的冬小麦在开花期、灌浆期吸收的氮素较高,成熟期小麦茎杆氮素含量较低而籽粒含氮量较高。氮锌配施能显著提高冬小麦氮素利用效率,施氮90、180和270kg/hm2分别配施锌肥15和30kg/hm2,与单施等量氮肥相比,氮肥表观利用率、氮肥生理利用率和氮素农学利用率分别提高4.8%～14.4%、1.4～9.8kg/kg和0.6～6.4kg/kg。氮锌配施比单施同量氮肥增产8.6%、10.5%(N90),5.9%、14.6%(N180)和5.9%、5.3%(N270),其中施氮180kg/hm2配施锌肥30kg/hm2的产量最高,显著高于其他处理。氮锌配施比单施同量氮肥提高小麦籽粒蛋白质含量,分别提高了8.3%、9.8%(N90),11.4%、2.3%(N180)和6.9%、5.7%(N270),其中N180Zn15的籽粒蛋白质含量最高,显著高于其他处理。N180Zn30在实现高产的同时可以显著提高氮肥利用率、氮肥生理利用率和氮素农学利用率,是比较好的氮锌配施组合。
The effects of nitrogen and zinc fertilizers on nitrogen uptake by winter wheat at different growth stages were investigated under field conditions with YuNong 202 as material. The effects of nitrogen and zinc fertilization on the nitrogen use efficiency, yield and grain protein content of winter wheat were also discussed. The results showed that the combination of nitrogen and zinc could promote the nitrogen absorption of winter wheat. Compared with the single application of nitrogen and nitrogen, the winter wheat with nitrogen and zinc application had higher nitrogen uptake during the flowering and filling stages, and the nitrogen content Lower and higher nitrogen content of grain. The combination of nitrogen and zinc could significantly increase the nitrogen use efficiency of winter wheat. Nitrogen application rates of 90, 180 and 270 kg / hm2 were 15 and 30 kg / hm2, respectively. Compared with the same amount of nitrogen fertilizer, the apparent nitrogen use efficiency, Utilization rate and nitrogen agronomic utilization rate increased by 4.8% ~ 14.4%, 1.4 ~ 9.8kg / kg and 0.6 ~ 6.4kg / kg respectively. The results showed that nitrogen and zinc fertilizers increased yields by 8.6%, 10.5% (N90), 5.9%, 14.6% (N180) and 5.9% and 5.3% (N270), respectively. The highest yield, significantly higher than the other treatments. Compared with N and Z alone, the grain protein content of wheat increased by 8.3%, 9.8% (N90), 11.4%, 2.3% (N180), 6.9% and 5.7% (N270) Highest, significantly higher than the other treatment. N180Zn30 is a good combination of nitrogen and zinc with high yield, nitrogen use efficiency, physiological nitrogen use efficiency and nitrogen agronomy utilization rate.