易镇邪, 王璞, 陶洪斌, 鲁来清, 于国建. 氮肥基/追比对华北平原夏玉米生长发育与水、氮利用的影响Ⅰ.夏玉米生长发育与水分利用效率[J]. 中国生态农业学报(中英文), 2007, 15(6): 65-68.
引用本文: 易镇邪, 王璞, 陶洪斌, 鲁来清, 于国建. 氮肥基/追比对华北平原夏玉米生长发育与水、氮利用的影响Ⅰ.夏玉米生长发育与水分利用效率[J]. 中国生态农业学报(中英文), 2007, 15(6): 65-68.
YI Zhen-Xie, WANG Pu, TAO Hong-Bin, LU Lai-Qing, YU Guo-Jian. Effect of base-N to dress-N ratio on water and nitrogen utilization,growth of summer maize in North China Plain.Ⅰ.Growth,development and water use efficiency of summer maize[J]. Chinese Journal of Eco-Agriculture, 2007, 15(6): 65-68.
Citation: YI Zhen-Xie, WANG Pu, TAO Hong-Bin, LU Lai-Qing, YU Guo-Jian. Effect of base-N to dress-N ratio on water and nitrogen utilization,growth of summer maize in North China Plain.Ⅰ.Growth,development and water use efficiency of summer maize[J]. Chinese Journal of Eco-Agriculture, 2007, 15(6): 65-68.

氮肥基/追比对华北平原夏玉米生长发育与水、氮利用的影响Ⅰ.夏玉米生长发育与水分利用效率

Effect of base-N to dress-N ratio on water and nitrogen utilization,growth of summer maize in North China Plain.Ⅰ.Growth,development and water use efficiency of summer maize

  • 摘要: 在较低施N量[180kg(N)/hm2]下,以“郑单958”为材料,研究了N肥不同基/追比例(1∶2、1∶1和2∶1)对华北平原夏玉米生长发育及水分利用效率的影响。结果表明,夏玉米总叶数、株高及产量均因施N而增加,且追N比例越大增幅越大。基施N有利于叶面积扩展,而追施N有利于灌浆期叶面积的维持;籽粒粗蛋白、游离氨基酸含量因施N而提高,且随追N比例增大而增大;淀粉含量以1∶2处理增大,而另两施N处理降低;施N可提高水分利用效率,追N比例较大有利于水分利用效率的提高。可见,对降水主要集中在夏玉米播种至大喇叭口期的华北平原来说,基施N不宜过多,基、追N肥比1∶2最有利于夏玉米农艺性状改善、产量提高、品质改善及水分利用效率提高。

     

    Abstract: Under low N application rate[180 kg(N)/ha],maize (Zhengdan958) was used to study the effect of base-N to dress-N ratios (RBTD) at 1∶2,1∶1 and 2∶1 on growth,development and water use efficiency (WUE) of summer maize in North China Plain.Results show increased leaf number,plant height and yield of summer maize under N fertilization,and that the increment gets larger with increased dress-N to total-N ratio (RDTT).Base-N has beneficial effects on leaf area expansion,while dress-N has beneficial effects on leaf area maintenance in filling stage.Coarse protein and free amino acid contents in maize grains increase with N fertilization and increased RDTT.The starch content of 1∶2 RBTD treatment increases,while those of the other two treatments drop.WUE heightens with increasing N application,and higher percentages of dress-N are proved to be advantageous to heightened WUE.Because precipitation mainly occurs in the sowing to jointing stage of summer maize in the North China Plain,it is concluded that less base-N application and RBTD ratio of 1∶2 are the best dosage for agronomic and quality traits amelioration,heightening yield and WUE of summer maize.

     

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