北方农业学报 ›› 2013, Vol. ›› Issue (4): 47-47.

• 土壤肥料研究与应用 • 上一篇    下一篇

不同施氮量下高产春玉米氮素吸收、积累及利用效率的研究

张峰 高聚林 王志刚 于晓芳 胡树平 苏治军 孙继颖 谢岷   

  1. 内蒙古农业大学农学院,内蒙古呼和浩特010019
  • 出版日期:2013-08-20 发布日期:2013-08-20
  • 通讯作者: 张峰
  • 作者简介:张峰(1987-),男,内蒙古呼和浩特人,内蒙古农业大学硕士研究生,从事玉米生理生态研究。 通讯作者:高聚林(1964-),男,内蒙古鄂托克前旗人,教授,博士,博士生导师,研究方向为玉米生理生态研究。
  • 基金资助:
    国家自然科学基金资助项目(31260300);国家粮食丰产科技工程(2011BAD16813,2012BAD04804,2013BAD07804);国家现代农业玉米产业技术体系蒙西综合试验站(CARS-02-63);973计划项目(2009CB118601)

The Research to Nitrogen Absorption and Accumulation and Nitrogen Use Efficiency of High Yield Spring Corn under Different Nitrogen Rate

ZHANG Feng (Agricultural College, Inner Mongolia Agricultural University, Hohhot 010019,China)   

  • Online:2013-08-20 Published:2013-08-20

摘要: 针对高产玉米氮肥生产效率低限制高产高效协调的问题,以明确高产春玉米氮素利用效率为目标,以不同基因型玉米品种为材料.在不同施氨量(0、30、450、600kg/hm2)下对比分析了高产春玉米氮素吸收、利用、转运特征及氮肥利用效率的差异。结果表明,当施氮量超过300kg/hm2 以上时,产量的增加幅度渐小。增加施氮量能增加生物产量和成熟期氮积累量,但减少花后吸氮和氮素再分配,降低收获指数。氮吸收效率和氮生理利用效率随施氮量的增加下降,其中氮素吸收效率与氮肥利用率极显著相关,该值的明显降低是导致氮肥利用率明显降低的主要原因之一。

Abstract: In order to solve the problem that the low nitrogen fertilizer efficiency of high yield corn limit coordination of high yield and efficient, we took experiment to made clear the nitrogen use efficiency of high-yielding spring maize.The materials are different genotype maize varieties.We set different N applications (0, 30, 450, 600 kg/hm2) and comparison analysised the differences of the nitrogen absorption and utilization, transfer characteristics and nitrogen use efficiency of high yield spring corn.The results showed that with increaing nitrogen rate, the lower yield increased, and the nitrogen harvest index decreased when N application was more than 300 kg/hm2. The nitrogen absorption increase first then decreased.N physiological use efficiency declined slightly. The nitrogen uptake efficiency significantly correlated to utilization efficiency. It was the reason to N fertilizer efficiency dropped sharply that the nitrogen uptake efficiency significantly decreased.

中图分类号: 

  • S513