植物学报 ›› 2012, Vol. 47 ›› Issue (2): 120-124.DOI: 10.3724/SP.J.1259.2012.00120

• 研究报告 • 上一篇    下一篇

植物排放N2O和CH4的研究

张秀君1*, 江丕文1, 朱海1, 董丹1, 夏宗伟2, 陈冠雄2   

  1. 1沈阳大学生物与环境工程学院, 沈阳 110044;
    2中国科学院沈阳应用生态研究所陆地生态过程重点实验室, 沈阳 110016
  • 收稿日期:2011-07-20 修回日期:2011-12-06 出版日期:2012-03-01 发布日期:2012-03-16
  • 通讯作者: 张秀君
  • 基金资助:

    国家自然科学基金青年基金项目

Investigation of N2O and CH4 Emissions from Plants

Xiujun Zhang1*, Piwen Jiang1, Hai Zhu1, Dan Dong1, Zongwei Xia2, Guanxiong Chen2   

  1. 1College of Biological and Environmental Engineering, Shenyang University, Shenyang 110044, China

    2Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2011-07-20 Revised:2011-12-06 Online:2012-03-01 Published:2012-03-16
  • Contact: Xiujun Zhang

摘要: N2O和CH4是2种重要的温室气体, 但其排放源尚未得到充分鉴别。1990年和2006年先后报道植物能排放N2O和CH4, 并日益受到广泛的关注。然而, 迄今为止对植物排放这2种气体的研究均是分开单独进行的。该文以8种陆生草本植物为研究对象, 首次同步考察了新鲜离体植物地上部排放N2O和CH4的通量。研究结果表明: 8种植物均能排放这2种气体。其中, 黑麦草(Lolium perenne)、抱茎苦荬菜(Ixeridium sonchifolium)和菠菜(Spinacia oleracea)的CH4通量较高, 分别为165.38、 52.28和21.64 ngCH4·g–1dw·h–1; 抱茎苦荬菜、蒙古蒿(Artemisia mongolica)、大豆(Glycine max)和菠菜的N2O通量较高, 分别为7.19、6.92、5.44和4.05 ngN2O·g–1dw·h–1。研究结果不仅为植物本身既能排放N2O又能排放CH4在植物中可能具有普遍性提供了进一步的实验依据, 而且为深入研究其机理找到了几种适宜的植物种(如抱茎苦荬菜、菠菜)。

Abstract: N2O and CH4 are two important greenhouse gases. However, their sources have not been well characterized. Plants are known to emit N2O and CH4, which has received widespread attention. We investigated N2O and CH4 emissions from fresh aboveground parts (branches and leaves) of 8 xerophytic herbaceous plants. All species could emit both N2O and CH4. Lolium perenne, Ixeridium sonchifolium and Spinacia oleracea showed high CH4 emission, with fluxes of 165.38, 52.28 and 21.64 ngCH4·g–1dw·h–1, respectively. I. sonchifolium, Artemisia mongolica, Glycine max and S. oleracea emitted more N2O, with fluxes of 7.19, 6.92, 5.44 and 4.05 ngN2O·g–1dw·h–1, respectively. These results provide further evidence of the universality of plants emitting N2O and CH4 but also reveal suitable plant species (I. sonchifolium and S. oleracea) for further mechanistic studies.