干旱区研究 ›› 2021, Vol. 38 ›› Issue (1): 123-132.doi: 10.13866/j.azr.2021.01.14

• 土壤资源 • 上一篇    下一篇

稳定碳同位素技术在土壤有机碳研究中的应用进展

刘丽贞1,2(),庞丹波1,2,王新云1,2,陈林1,2,李学斌1,2(),吴梦瑶1,2,刘波1,2,祝忠有1,2,李静尧3,4,王继飞3,4   

  1. 1.宁夏大学西北退化生态系统恢复与重建教育部重点实验室,宁夏 银川 750021
    2.宁夏大学西北土地退化与生态恢复国家重点实验室培育基地,宁夏 银川 750021
    3.宁夏贺兰山国家级自然保护区管理局,宁夏 银川 750021
    4.宁夏贺兰山森林生态系统定位观测研究站,宁夏 银川 750021
  • 收稿日期:2020-06-02 修回日期:2020-07-26 出版日期:2021-01-15 发布日期:2021-03-05
  • 通讯作者: 李学斌
  • 作者简介:刘丽贞(1993-),女,在读硕士,研究方向为稳定碳同位素生态学. E-mail: lizhenliu2019@163.com
  • 基金资助:
    宁夏自然科学基金课题(NZ17040);宁夏重点研发计划项目(2018BFG02015);国家自然科学基金(31960359);宁夏高等学校一流学科建设(生态学)资助项目(NXYLXK2017B06)

Application of stable carbon isotope technique in soil organic carbon research: A literature review

LIU Lizhen1,2(),PANG Danbo1,2,WANG Xinyun1,2,CHEN Lin1,2,LI Xuebin1,2(),WU Mengyao1,2,LIU Bo1,2,ZHU Zhongyou1,2,LI Jingyao3,4,WANG Jifei3,4   

  1. 1. Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China, Ningxia University, Yinchuan 750021, Ningxia, China
    2. Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwest China of Ministry of Education, Ningxia University, Yinchuan 750021, Ningxia, China
    3. Ningxia Helan Mountain National Nature Reserve Management Bureau, Yinchuan 750021, Ningxia, China
    4. Ningxia Helan Mountain Forest Ecosystem Location Observation and Research Station, Yinchuan 750021, Ningxia, China
  • Received:2020-06-02 Revised:2020-07-26 Online:2021-01-15 Published:2021-03-05
  • Contact: Xuebin LI

摘要:

土壤碳周转是大气圈、生物圈与岩石圈之间碳迁移转化的重要过程,其微小变化将影响大气CO2浓度,改变植物地上与地下部分碳的动态与分配。目前稳定碳同位素技术广泛应用于不同时间尺度与空间尺度碳素生物地球化学循环研究,但缺乏针对稳定碳同位素技术应用于土壤有机碳研究的概述。本文在对当前利用稳定碳同位素技术研究土壤碳起源、动态变化以及周转等资料整理的基础上,简要总结陆地生态系统植物叶片-凋落物-土壤连续体、叶片-土壤连续体和土壤中稳定碳同位素(δ13C)变化规律。重点介绍了土壤碳素循环的主要影响因素及其适应规律,同时对比13C自然与13C人工标记法的异同,指出利用稳定碳同位素方法研究土壤碳动态过程中应加强的方面和未来的重点研究方向及趋势。明确上述过程及机制可为预测生态系统的源/汇效应奠定基础,加强对陆地生态系统碳循环定量研究,将对土壤碳源/汇潜力的了解和土壤有机碳周转机理的深入了解有所裨益。

关键词: 稳定碳同位素, δ13C, 土壤有机碳, Δδ13C, 影响因素

Abstract:

Soil carbon turnover is an important part of carbon transfer between the atmosphere, biosphere, and lithosphere. Even small changes in the soil carbon pool could affect the atmospheric CO2 concentration and dynamic carbon above and underground. Stable carbon isotope technology is currently used widely in carbon biogeochemical cycle research at different time and space scales. However, there is a lack of integration of this technology with soil carbon turnover research. This literature review examined numerous studies on the application of stable carbon isotope technology to soil carbon origin, turnover, and dynamic changes. It also analyzed stable carbon isotope (δ13C) variations in the leaf-litter-soil leaf-soil continuums, and terrestrial ecosystems; focusing on (1) the characteristics of stable carbon isotope technology in the soil carbon cycle, (2) the main factors influencing the cycle, (3) the adaptive rules of soil carbon cycle turnover, (4) the similarities and differences between natural and artificial13C labeling methods, and (5) the aspects of future research integration that should be emphasized. This review could elucidate the role of soil carbon sources and sinks in terrestrial ecosystems and soil organic carbon turnover mechanisms and processes.

Key words: stable carbon isotope, δ13C, soil organic carbon, Δδ13C, influence factors