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放射性碳同位素在土壤碳循环中的应用
The Application of Radiocarbon in the Study of Soil Carbon Cycles

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文摘 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.
其他语种文摘 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 CO_2 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.
来源 地理科学进展 ,2004,23(4):43-51 【核心库】
关键词 放射性碳同位素 ; 土壤碳循环
地址

中国科学院地理科学与资源研究所, 北京, 100101

语种 中文
文献类型 研究性论文
ISSN 1007-6301
学科 农业基础科学;环境科学基础理论
基金 国家自然科学基金重点项目
文献收藏号 CSCD:1775130

参考文献 共 40 共2页

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引证文献 1 篇

1 梁晨 北京松山国家级自然保护区典型植被类型表层土壤碳密度及周转速率特征 地球与环境,2020,48(6):672-679
CSCD被引 2 次

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