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作物学报 ›› 2010, Vol. 36 ›› Issue (05): 879-884.doi: 10.3724/SP.J.1006.2010.00879

• 研究简报 • 上一篇    

不同氮效率基因型水稻植株氨挥发速率及其与氮效率的关系

陈明霞1,2,黄见良1,*,崔克辉1,聂立孝1,彭少兵3   

  1. 1华中农业大学作物生理生态与栽培研究中心/农业部华中作物生理生态与栽培重点开放实验室，湖北武汉430070；2河南师范大学生命科学学院，河南新乡453002；3国际水稻研究所，菲律宾DAPO7777
  • 收稿日期:2010-02-23 修回日期:2010-03-07 出版日期:2010-05-12 网络出版日期:2010-03-15
  • 通讯作者: 黄见良, E-mail:jhuang@mail.hzau.edu.cn; Tel : 027-87284131
  • 基金资助:

    本研究由国家自然科学基因重大国际合作项目（30821140349），农业公益性行业计划（200803030）和国家科技支撑计划项目（2006BAD02A13-3-3）资助。

Genotypic Variation in Ammonia Volatilization Rate of Rice Shoots and Its Relationship with Nitrogen Use Efficiency

CHEN Ming-Xia1,2,HUANG Jian-Liang1,*,CUI Ke-Hui1,NIE Li-Xiao1,PENG Shao-Bing3   

  1. 1 Crop Physiology and Production Center, Huazhong Agricultural University / Key Laboratory of Huazhong Crop Physiology, Ecology and Production, Ministry of Agriculture, Wuhan 430070, China; 2 College of Life Science, Henan Normal University, Xinxiang 453002, China; 3 International Rice Research Institute (IRRI), DAPO 7777, Metro Manila, Philippines
  • Received:2010-02-23 Revised:2010-03-07 Published:2010-05-12 Published online:2010-03-15
  • Contact: HUANG Jian-Liang,E-mail:jhuang@mail.hzau.edu.cn; Tel : 027-87284131

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1641

被引次数

22

摘要：

植物组织中氮素气态挥发损失可能与其氮效率密切相关。探讨不同氮效率基因型水稻地上部NH3挥发特征及其与氮效率的关系,可为氮高效基因型的筛选提供理论依据和技术指标。本试验采用4个氮浓度进行盆栽液培，以扬稻6号、BG34-8、武育粳3号和珍汕97B等4个水稻品种为材料，研究水稻NH3挥发速率(ammonia volatilization rate, AVR)与氮利用效率的关系。结果表明，各基因型的AVR在各生育期的变化趋势不完全相同，扬稻6号和武育粳3号在幼穗分化期最高，分别为11.0和10.4 mg N h-1 pot-1，而BG34-8和珍汕97B的AVR在孕穗期最高，分别为22.5和23.4 mg N h-1 pot-1；对相同的基因型，随培养液中氮浓度的增加，植株的AVR增大，氮低效基因型珍汕97B和武育粳3号的增幅大于氮高效基因型扬稻6号和BG34-8；在培养液中氮浓度较高时(80 mg N L-1)植株地上部AVR与氮素积累量、氮素籽粒生产效率、氮肥农学利用率和氮肥生理利用率呈显著或极显著负相关 (r= -0.6768**、-0.6158*、-0.6667**、-0.8353**)。综上所述，水稻植株的AVR存在基因型差异，氮高效基因型的AVR较低；在高氮浓度液培条件下，较低的AVR可作为氮高效材料筛选指标。

关键词: 水稻, 基因型, NH3挥发速率, 氮效率

Abstract:

Gaseous nitrogen losses from rice plant tissues may be closely related to nitrogen use efficiency (NUE), the research on which may provide a theoretical supplement in nitrogen nutrition and a technical parameter for higher NUE genotype screening. Pot experiments under solution culture with four nitrogen concentrations of 0, 20, 40, and 80 mg N L-1 respectively, were carried out to assess the correlation between ammonia volatilization rate (AVR) from booting stage to milking stage and NUE of different rice varieties including higher NUE type of Yangdao 6 and BG34-8, lower NUE type of Wuyujing 3 and Zhenshan 97B. The results showed that the peak AVR of Yangdao 6 and Wuyujing 3 was 11.0 and 10.4 mg N h-1 pot-1 respectively at panicle initiation stage, the peak AVR of BG34-8 and Zhenshan 97B was 22.5 and 23.4 mg N h-1 pot-1 respectively at booting stage. The AVR increased with the nitrogen concentration increasing in the culture solutions for a given genotype, the range of increase was larger in lower-NUE varieties Zhenshan 97B and Wuyujing 3 than in higher-NUE varieties Yangdao 6 and BG34-8. There were significantly negative correlations between AVR and aboveground nitrogen accumulation (r = -0.6768**), NUE in grain production (r= -0.6158*), fertilizer-N agronomic efficiency (r = -0.6667**), and fertilizer-N physiological efficiency (r= -0.8353**), when all the tested genotypes were cultured in higher nitrogen concentration of solution (80 mg N L-1). The general conclusion of the research is that there are significant genotypic differences in AVR, and the higher-NUE genotypes have lower AVR than the lower-NUE genotypes. Hence, lower AVR under higher nitrogen concentration of culture could be an effective parameter for higher-NUE genotype screening.

Key words: Rice, Genotype, Ammonia volatilization rate, Nitrogen use efficiency


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