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水稻成熟衰老期叶际及根际氮氧化物排放的光控机制

徐胜光 林丽 余磊 陈泽斌 刘佳妮 王定康 耿开友

徐胜光, 林丽, 余磊, 陈泽斌, 刘佳妮, 王定康, 耿开友. 水稻成熟衰老期叶际及根际氮氧化物排放的光控机制[J]. 环境科学研究, 2016, 29(7): 963-971.
引用本文: 徐胜光, 林丽, 余磊, 陈泽斌, 刘佳妮, 王定康, 耿开友. 水稻成熟衰老期叶际及根际氮氧化物排放的光控机制[J]. 环境科学研究, 2016, 29(7): 963-971.
XU Shengguang, LIN Li, YU Lei, CHEN Zebin, LIU Jiani, WANG Dingkang, GENG Kaiyou. Impacts of Light Quality and Intensity on Nitrogen Oxide Gas Emissions of Rice Phyllosphere and Rhizosphere at Mature Aging Stage[J]. Research of Environmental Sciences, 2016, 29(7): 963-971.
Citation: XU Shengguang, LIN Li, YU Lei, CHEN Zebin, LIU Jiani, WANG Dingkang, GENG Kaiyou. Impacts of Light Quality and Intensity on Nitrogen Oxide Gas Emissions of Rice Phyllosphere and Rhizosphere at Mature Aging Stage[J]. Research of Environmental Sciences, 2016, 29(7): 963-971.

水稻成熟衰老期叶际及根际氮氧化物排放的光控机制

基金项目: 国家自然科学基金项目(31160412,41361056);云南省基础研究面上项目(2011FZ183)

Impacts of Light Quality and Intensity on Nitrogen Oxide Gas Emissions of Rice Phyllosphere and Rhizosphere at Mature Aging Stage

  • 摘要: 为研究水稻成熟衰老期叶际及根际NOGs(nitrogen oxides gases, 氮氧化物)排放的光控机制,在同步测定条件下,采用密闭箱法,研究了不同光质(黄、绿、白、红、蓝光)、光强〔0.00、(50.00±2.35)(75.00±2.32)(100.00±3.89) μmol/(m2·s)〕对水稻成熟衰老期叶际及根际NOGs排放的影响. 结果表明:在相同氮源〔NH4NO3-N,ρ(N)为90 mg/L〕下,日间光强为(75.00±2.32) μmol/(m2·s)时,水稻成熟衰老期叶际N2O和NO的平均排放速率分别为18.09、0.39 μg/(pot·h),二者排放量分别占各自总排放量的28.88%、30.78%;在(100.00±3.89)μmol/(m2·s)光强条件下,叶际N2O和NO的平均排放速率则分别为23.27、0.50 μg/(pot·h),二者排放量分别占各自总排放量的36.74%、27.92%. 在0.00~(100.00±3.89)μmol/(m2·s)日间光强下,水稻叶际及根际N2O和NO排放随随光强增加而增强,但不同光照条件下水稻叶际及根际均无明显的NO2净排放作用. 在光强一致〔(20.00±0.48)μmol/(m2·s)〕条件下,同期黄、绿、白、红、蓝光处理的水稻叶际N2O平均排放速率分别为24.90、15.46、13.85、16.40和19.77 μg/(pot·h),红、蓝光在抑制水稻叶际N2O及根际NO排放的同时,也促进了水稻根际N2O的排放. 研究显示,水稻成熟衰老期叶际及根际NOGs排放均以N2O为主,叶际N2O的排放可以反映根际N2O的排放情况. 光照越强,NOGs排放就越明显. 适度控制日间光强并增加红、蓝光比例,可抑制N2O和NO排放.

     

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  • 收稿日期:  2015-09-26
  • 修回日期:  2016-04-19
  • 刊出日期:  2016-07-25

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