不同施氮量对冬小麦烟农0428产量及氮肥利用效率的影响

摘要

以济麦21为对照品种,在大田条件下设置4个施氮量水平(纯N0、90、180、240 kg/hm2),研究了不同施氮量对冬小麦烟农0428籽粒产量和氮素利用效率的影响.结果表明:随着氮肥施用量增加,烟农0428籽粒产量增加.同一施氮量条件下,烟农0428籽粒产量明显高于济麦21.随着施氮量的增加,烟农0428氮素养分利用效率、氮肥偏生产力降低.同一施氮量处理相比较,烟农0428氮素养分利用效率、氮肥偏生产力均高于济麦21.本试验条件下,综合考虑施氮量对烟农0428小麦产量、氮肥利用效率的影响,以施氮量为180 kg/hm2处理较为适宜.%In this research,four levels of nitrogen (N0,N90,N180 and N240) were designed,and the effects of nitrogen application amount on grain yield and nitrogen use efficiency of winter wheat Yannong 0428 were studied under the field condition with Jimai 21 as control.The results showed that the grain yield of Yannong 0428 increased with the increase of nitrogen application amount.Under the condition of the same nitrogen application amount,the grain yield of Yannong 0428 was obviously higher than that of Jimai 21.With the increase of nitrogen application amount,the nitrogen nutrient use efficiency and nitrogen partial factor productivity of Yannong 0428 decreased.And under the condition of the same nitrogen application amount,the nitrogen nutrient use efficiency and nitrogen partial factor productivity of Yannong 0428 were both higher than those of Jimai 21.Comprehensively considering the effects of nitrogen application amount on yield and nitrogen use efficiency of Yannong 0428,N180 treatment was more appropriate.