氮肥对不同耐低氮性玉米品种生育后期叶绿素含量和氮代谢酶活性的影响

doi:10.11686/cyxb2017006

草业学报 ›› 2017, Vol. 26 ›› Issue (10): 188-197.DOI: 10.11686/cyxb2017006

氮肥对不同耐低氮性玉米品种生育后期叶绿素含量和氮代谢酶活性的影响

吴雅薇¹, 李强¹, 豆攀¹, 马晓君¹, 余东海², 罗延宏³, 孔凡磊¹, 袁继超^{1, *}

1.农业部西南作物生理生态与耕作重点实验室,四川农业大学农学院,四川成都 611130;
2.眉山市东坡区农业技术推广站, 四川眉山 620032;
3.四川省烟草公司宜宾市公司烟叶生产技术推广应用中心,四川宜宾 644002

收稿日期:2017-01-09 出版日期:2017-10-20 发布日期:2017-10-20
通讯作者: yuanjichao5@163.com
作者简介:吴雅薇(1993-),女,福建南平人,在读硕士。E-mail:wyw6140@163.com
基金资助:
公益性行业(农业)科研专项经费(201503127),国家“十二五”科技支撑计划项目(2012BAD04B13),四川省科技支撑计划项目(2014NZ0040)和四川省玉米产业技术体系岗位专家项目资助

Effects of nitrogen fertilizer on leaf chlorophyll content and enzyme activity at late growth stages in maize cultivars with contrasting tolerance to low nitrogen

WU Ya-Wei¹, LI Qiang¹, DOU Pan¹, MA Xiao-Jun¹, YU Dong-Hai², LUO Yan-Hong³, KONG Fan-Lei¹, YUAN Ji-Chao^{1, *}

1.Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Ministry of Agriculture, College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China;
2.Dongpo Agriculture Technology Extension Station, Meishan 620032, China;
3.Tobacco Production Technology of Dissemination and Apply of Yibin Tobacco Corporation in Sichuan, Yibin 644002, China

Received:2017-01-09 Online:2017-10-20 Published:2017-10-20

摘要/Abstract

摘要： 主要探讨了氮肥对不同耐低氮性玉米品种生育后期叶片叶绿素含量和氮代谢关键酶活性及籽粒蛋白质含量和产量的影响,以期为西南地区不同耐低氮性玉米品种的高产高效施肥技术提供依据。采用裂区试验设计,主区为前期筛选的不同耐低氮性玉米品种:耐低氮品种正红311(ZH311)和低氮敏感品种先玉508(XY508),副区为不同施氮量:包括6个氮水平(0, 90, 180, 270, 360和450 kg/hm²)。结果表明,施氮可以显著提高玉米生育后期叶片叶绿素含量和氮代谢关键酶活性,并最终提高籽粒蛋白质含量和产量。增施氮肥对低氮敏感品种先玉508各生理指标的促进作用较耐低氮品种正红311更明显,但耐低氮品种正红311生育后期叶片叶绿素含量及氮代谢关键酶活性均显著高于低氮敏感品种先玉508,尤其是灌浆中后期和低中氮水平下,使其最终籽粒产量及籽粒蛋白质含量均显著高于先玉508,这可能是其较低氮敏感品种先玉508耐低氮能力强的重要生理机制。

Abstract: The aim of this study was to investigate the effects of nitrogen (N) fertilizer on the activity of N metabolism and growth of two maize (Zea mays) cultivars with contrasting tolerance to low N. An experiment was laid out in a split-plot design with three replicates. The main plot consisted of two maize cultivars with contrasting tolerance to low N (the low-N tolerant cultivar ZH311 and the low-N sensitive cultivar XY508). The split plot consisted of six N treatments: 0, 90, 180, 270, 360, and 450 kg/ha. The chlorophyll content and the activities of enzymes involved in N metabolism (NR: nitrate reductase, GS: glutamine synthetase, GDH: glutamate dehydrogenase) at late growth stages were determined, as well as the seed protein content and yield. The results showed that N fertilizer increased chlorophyll content and enzyme activities at late stages, and promoted protein content and yield. As the amount of N fertilizer increased, these indexes increased to a greater extent in XY508 than in ZH311, while all indexes were higher in ZH311 than in YX508. Compared with the low-N sensitive cultivar, the low-N tolerant cultivar retained a higher chlorophyll content and higher activities of enzymes involved in N metabolism, especially at the mid to late grain-filling stage. In addition, the low-N tolerant cultivar required low to mid N levels to improve seed protein content and yield. These results provide information about the physiological mechanisms involved in tolerance to low-N conditions.

吴雅薇, 李强, 豆攀, 马晓君, 余东海, 罗延宏, 孔凡磊, 袁继超. 氮肥对不同耐低氮性玉米品种生育后期叶绿素含量和氮代谢酶活性的影响[J]. 草业学报, 2017, 26(10): 188-197.

WU Ya-Wei, LI Qiang, DOU Pan, MA Xiao-Jun, YU Dong-Hai, LUO Yan-Hong, KONG Fan-Lei, YUAN Ji-Chao. Effects of nitrogen fertilizer on leaf chlorophyll content and enzyme activity at late growth stages in maize cultivars with contrasting tolerance to low nitrogen[J]. Acta Prataculturae Sinica, 2017, 26(10): 188-197.

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氮肥对不同耐低氮性玉米品种生育后期叶绿素含量和氮代谢酶活性的影响

Effects of nitrogen fertilizer on leaf chlorophyll content and enzyme activity at late growth stages in maize cultivars with contrasting tolerance to low nitrogen

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