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Sequential combustion separation of soil organic carbon fractions for AMS measurement of 14C and their application in fixation of carbon

  • Xia Yu
  • Weijian ZhouEmail author
  • Yunqiang Wang
  • Peng Cheng
  • Yaoyao Hou
  • Hua Du
  • Xiaohu Xiong
  • Ling Yang
  • Ya Wang
  • Yunchong Fu
Article
  • 39 Downloads

Abstract

A temperature stepped-combustion method for separating soil organic carbon (SOC) fractions and their 14C ages was developed to investigate SOC fixation and stability in soils. After acid-leaching, SOC was sequentially oxidized, and extracted from three temperature intervals: (1) 25–400 °C, (2) 400–600 °C, and (3) 600–900 °C. The acid-soluble carbon and SOC released below 600 °C are labile components, with relatively younger 14C ages, while the SOC released above 600 °C is stable with older 14C ages. We applied this method in a grassland, maize cropland and forest nursery cropland, to assist in understanding the stability of carbon in soils under different land use conditions.

Keywords

14C ages Labile-stable SOC Reclaimed cropland Temperature stepped-combustion 

Notes

Acknowledgements

This work was jointly supported by National Natural Science Foundation of China (41730108, 41773141, and 41573136); National Research Program for Key Issues in Air Pollution Control (DQGG0105-02); the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA23010302); CAS “Light of West China” Program (XAB2016A01); Youth Innovation Promotion Association CAS (2017452); State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS (SKLLQG1724); Supported by the International Partnership Program of Chinese Academy of Sciences, Grant No. 132B61KYSB20170005. Dr. Cheng Peng would like to express sincere thanks to the Belt &Road Center for Earth Environment Studies and CAS Key Technology Talent Program. We thank anonymous reviewers and the Editor for their insightful comments, which significantly improved this paper. Funding was provided by National Nature Science Foundation of China (Grant No. NSFC41730108), State Key Laboratory of Loess and Quaternary Geology (Grant No. LQ1301).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  1. 1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth EnvironmentChinese Academy of SciencesXi’anChina
  2. 2.Shaanxi Key Laboratory of Accelerator Mass Spectrometry Technology and ApplicationXi’an AMS CenterXi’anChina
  3. 3.University of Chinese Academy of SciencesBeijingChina
  4. 4.Interdisciplinary Research Center of Earth Science FrontierBeijing Normal UniversityBeijingChina
  5. 5.CAS Center for Excellence in Quaternary Science and Global ChangeXi’anChina
  6. 6.Open Studio for Oceanic-Continental Climate and Environment ChangesPilot National Laboratory for Marine Science and Technology (Qingdao)QingdaoChina
  7. 7.Institute of Global Environmental ChangeXi’an Jiaotong UniversityXi’anChina

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