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生态学杂志 ›› 2001, Vol. ›› Issue (1): 13-17.

• 研究报告 • 上一篇    下一篇

通过树木年轮δ13C重建大气CO2碳同位素比δa的可靠性探讨

侯爱敏, 彭少麟, 周国逸, 温达志   

  1. 中国科学院华南植物研究所, 广州510275
  • 收稿日期:1999-08-05 修回日期:2000-08-05 出版日期:2001-02-10
  • 基金资助:
    本研究得到国家自然科学基金重大项目(39899370);广东省自然科学基金重大项目(980952);中国科学院“九五”特别支持项目

Re-Examine the Reliability of Tree-Ring Isotope Ratios in the Reconstruction of Atmospheric CO2 Isotope Ratio Variation

Hou Aimin, Peng Shaolin, Zhou Guoyi, Wen Dazhi   

  1. South China Institute of Botany, Guangzhou, 510275
  • Received:1999-08-05 Revised:2000-08-05 Online:2001-02-10

关键词: 春玉米, 作物气象指标, 指标连续性, 气候适宜度

Abstract: Based on the experimental results from seven subtropical species,in contrast with other researchers′ results, the parameter Ci/Ca (ratio of substomatal CO2 to atmospheric CO2 concentration)is not stable,but varies with species and environmental factors,especially light intensity.Thus,we concluded that the use of tree ring isotope ratios in the reconstruction of atmospheric CO2 isotope ratio δa variation,which is based on the assumption that Ci/Ca keeps stable during assimilation,is not reliable under current circumstances.

Key words: spring maize, meteorological index for crop growth, continuity of crop index, climatic suitability.

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