地理科学进展 ›› 2004, Vol. 23 ›› Issue (4): 43-51.doi: 10.11820/dlkxjz.2004.04.006

• 生态环境与碳循环 • 上一篇    下一篇

放射性碳同位素在土壤碳循环中的应用

王 琳1,2, 欧阳华1, 周才平1, 宋明华1, 田玉强1,2   

  1. 1. 中国科学院地理科学与资源研究所, 北京 100101;
    2. 中国科学院研究生院, 北京 100039
  • 收稿日期:2004-01-01 修回日期:2004-03-01 出版日期:2004-07-24 发布日期:2010-08-07
  • 作者简介:王琳(1978-),女,在读博士生,主要从事陆地生态系统格局与过程方面的研究。 E-mail: lwang@igsnrr.ac.cn
  • 基金资助:

    国家自然科学基金重点项目(40331006)资助。

The Application of Radiocarbon in the Study of Soil Carbon Cycles

WANG Lin1,2, OUYANG Hua1, ZHOU Caiping1, SONG Minghua1, TIAN Yuqiang1,2   

  1. 1. Institute of Gegographical Sciences and Natural Resources Research, CAS, Beijing 100101;
    2. Graduate School of CAS, Beijing 100039
  • Received:2004-01-01 Revised:2004-03-01 Online:2004-07-24 Published:2010-08-07

摘要:

文中介绍了放射性碳同位素方法在土壤碳循环中的应用,分析了在土壤有机质、土壤CO2气体研究中的主要方法和模型,并指出土壤有机质的放射性测定可以研究较长时间尺度的碳循环(十几年、几十年至更长时间尺度),而土壤CO2气体的放射性测定可以研究短期(季节变化和年变化)内碳的动态。放射性碳同位素用于土壤中细根周转时间的计算、土地利用变化等方面的研究成果及方法也在文中分别作了介绍和分析。最后提出了国内研究应加强的领域和未来利用放射性碳同位素方法研究土壤碳循环的重点研究方向和发展趋势。

关键词: 放射性碳同位素, 土壤碳循环

Abstract:

The carbon cycles in the soil is important for the study of the global change because the carbon deposited in the soil is two times more than that in the atmosphere and three times more than that in the plant and animal. While the final mechanism of the terrestrial carbon cycles is still not clear without the understanding of the soil dynamics, the radiocarbon provides a simple and convenient method to study the turnover of the soil organic matter (SOM). Several models and methods in the study of soil organic matter turnover by the application of radiocarbon were introduced in this paper. It was pointed out that the SOM radiocarbon application may be used to study the carbon cycle of longer time scale such as decades and more, whereas its application to the soil CO2 can be used to study the carbon cycle of shorter time scale such as seasons or one year. Other applications such as those in the study of fine root age and land use change were also introduced in this paper. Although radiocarbon had been used in the study of carbon cycle, its application was very limited so far and some problems had been found. At last, some issues unsettled were put forward and the future development direction and fields using this method to study the SOM dynamics were introduced.

Key words: radiocarbon, soil carbon cycles