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地球科学进展  2005, Vol. 20 Issue (5): 568-577    DOI: 10.11867/j.issn.1001-8166.2005.05.0568
生态学研究     
碳同位素技术在土壤碳循环研究中的应用
于贵瑞1;王绍强1;陈泮勤2;李庆康1
1.中国科学院地理科学与资源研究所,北京 100101;2.中国科学院资源与环境科学技术局,北京 100864
ISOTOPE TRACER APPROACHES IN SOIL ORGANIC CARBON CYCLE RESEARCH
YU Guirui1; WANG Shaoqiang1; CHEN Panqin2; LI Qingkang1
1.Institute of Geographical Sciences and Natural Resources Research, CAS, Beijing, 100101, China;  2.Bureau of Science and Technology for Resource and Environment, Beijing 100864,China
 全文: PDF(157 KB)  
摘要:

碳在土壤中的储量和存储时间是陆地生态系统碳库中最大和最长的,而土地利用方式会影响到土壤碳储量及其循环周期,因此有效的土地利用管理可使土壤成为一个碳汇。土壤储存碳的过程就是土壤有机碳动态平衡的变化,因此认识土壤有机碳的动态变化是揭示土壤碳循环过程及其调控机制的重要方面。首先介绍了碳的一种稳定性同位素(13C)和放射性同位素(14C)在生态系统长期动态过程的重建(如C3/C4植被的历史格局)、土壤有机碳周转周期等方面的应用,探讨了同位素示踪技术在土壤有机碳来源、周转周期、土壤CO2通量的变化和组分区分、同位素富集等研究领域的应用,归纳了土壤碳循环研究中的基本问题,提出了未来土壤碳循环同位素示踪的主要研究方向。

关键词: 土壤有机碳碳循环稳定性同位素放射性同位素    
Abstract:

Among carbon pools of terrestrial ecosystems, the soil carbon storage is the largest and has the longest resident time. Since the soil carbon storage and its cycling are affected by the land use practice, effective land use management can result in the role of soil as a carbon sink. The process of soil carbon sequestration is the change of dynamic balance of soil organic carbon (SOC), which is critical for revealing the process and regulatory mechanism of soil carbon cycle. This paper presents and summaries the application of stable and radioactive carbon isotopes (δ13C and 14C) in the regeneration of longterm carbon dynamics process of ecosystem(such as the historical pattern of C3/C4 vegetation) and in SOC cycling. The application of isotopic techniques in the studies of SOC source and cycling, soil CO2 flux change and component difference, isotopic enrichment, etc. is also discussed. In addition, the fundamental issues related to SOC dynamics are outlined and the major topics for isotopic tracer of SOC dynamics in future are proposed in the paper.

Key words: Radioactive carbon isotope.    Soil organic carbon    Carbon cycle    Stable carbon isotope
收稿日期: 2004-06-16 出版日期: 2005-05-25
:  S15  
基金资助:

国家重点基础研究发展规划项目“中国陆地生态系统碳循环及其驱动机制研究”(编号:2002CB412501);中国科学院地理科学与资源研究所主干科学计划“中国陆地生态系统土壤碳估算”(编号:CXIOG-E02-02-02);中国科学院知识创新工程重大项目“中国陆地和近海生态系统碳收支研究”(KZCX1-SW-01-19)资助.

通讯作者: 于贵瑞   
作者简介: 于贵瑞 (1959-),男,辽宁大连人,研究员,主要从事全球变化生态学与陆地水碳循环研究. E-mail:yugr@igsnrr.ac.cn
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引用本文:

于贵瑞;王绍强;陈泮勤;李庆康. 碳同位素技术在土壤碳循环研究中的应用[J]. 地球科学进展, 2005, 20(5): 568-577.

YU Guirui;WANG Shaoqiang; CHEN Panqin; LI Qingkang. ISOTOPE TRACER APPROACHES IN SOIL ORGANIC CARBON CYCLE RESEARCH. Advances in Earth Science, 2005, 20(5): 568-577.

链接本文:

http://www.adearth.ac.cn/CN/10.11867/j.issn.1001-8166.2005.05.0568        http://www.adearth.ac.cn/CN/Y2005/V20/I5/568

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