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Soil Inorganic Carbon as a Potential Sink in Carbon Storage in Dryland Soils—A Review

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  • Anandkumar Naorem

    (Indian Council of Agricultural Research–Central Arid Zone Research Institute, Jodhpur 342003, Rajasthan, India
    Indian Council of Agricultural Research–Indian Institute of Soil Science, Nabibagh, Bhopal 462038, Madhya Pradesh, India)

  • Somasundaram Jayaraman

    (Indian Council of Agricultural Research–Indian Institute of Soil Science, Nabibagh, Bhopal 462038, Madhya Pradesh, India)

  • Ram C. Dalal

    (School of Agriculture and Food Sciences, The University of Queensland, St Lucia, QLD 4072, Australia)

  • Ashok Patra

    (Indian Council of Agricultural Research–Indian Institute of Soil Science, Nabibagh, Bhopal 462038, Madhya Pradesh, India)

  • Cherukumalli Srinivasa Rao

    (ICAR–National Academy of Agricultural Research Management, Rajendranagar, Hyderabad 500030, Telangana, India)

  • Rattan Lal

    (Carbon Management Sequestration Center, The Ohio State University, 2021 Coffey Rd, Columbus, OH 43210, USA)

Abstract

Soil organic carbon (SOC) pool has been extensively studied in the carbon (C) cycling of terrestrial ecosystems. In dryland regions, however, soil inorganic carbon (SIC) has received increasing attention due to the high accumulation of SIC in arid soils contributed by its high temperature, low soil moisture, less vegetation, high salinity, and poor microbial activities. SIC storage in dryland soils is a complex process comprising multiple interactions of several factors such as climate, land use types, farm management practices, irrigation, inherent soil properties, soil biotic factors, etc. In addition, soil C studies in deeper layers of drylands have opened-up several study aspects on SIC storage. This review explains the mechanisms of SIC formation in dryland soils and critically discusses the SIC content in arid and semi-arid soils as compared to SOC. It also addresses the complex relationship between SIC and SOC in dryland soils. This review gives an overview of how climate change and anthropogenic management of soil might affect the SIC storage in dryland soils. Dryland soils could be an efficient sink in C sequestration through the formation of secondary carbonates. The review highlights the importance of an in-depth understanding of the C cycle in arid soils and emphasizes that SIC dynamics must be looked into broader perspective vis-à-vis C sequestration and climate change mitigation.

Suggested Citation

  • Anandkumar Naorem & Somasundaram Jayaraman & Ram C. Dalal & Ashok Patra & Cherukumalli Srinivasa Rao & Rattan Lal, 2022. "Soil Inorganic Carbon as a Potential Sink in Carbon Storage in Dryland Soils—A Review," Agriculture, MDPI, vol. 12(8), pages 1-20, August.
    • Handle: RePEc:gam:jagris:v:12:y:2022:i:8:p:1256-:d:891993
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    References listed on IDEAS

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    1. R. D. Evans & A. Koyama & D. L. Sonderegger & T. N. Charlet & B. A. Newingham & L. F. Fenstermaker & B. Harlow & V. L. Jin & K. Ogle & S. D. Smith & R. S. Nowak, 2014. "Greater ecosystem carbon in the Mojave Desert after ten years exposure to elevated CO2," Nature Climate Change, Nature, vol. 4(5), pages 394-397, May.
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