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Root effects on soil organic carbon: a double-edged sword.

Root effects on soil organic carbon: a double-edged sword.

Authors :
Dijkstra FA
Zhu B
Cheng W
Source :
The New phytologist [New Phytol] 2021 Apr; Vol. 230 (1), pp. 60-65. Date of Electronic Publication: 2020 Dec 10.
Publication Year :
2021

Abstract

From recent developments on how roots affect soil organic carbon (SOC) an apparent paradox has emerged where roots drive SOC stabilization causing SOC accrual, but also SOC destabilization causing SOC loss. We synthesize current results and propose the new Rhizo-Engine framework consisting of two linked components: microbial turnover and the soil physicochemical matrix. The Rhizo-Engine is driven by rhizodeposition, root turnover, and plant uptake of nutrients and water, thereby accelerating SOC turnover through both stabilization and destabilization mechanisms. This Rhizo-Engine framework emphasizes the need for a more holistic approach to study root-driven SOC dynamics. This framework would provide better understanding of plant root effects on soil carbon sequestration and the sensitivity of SOC stocks to climate and land-use changes.<br /> (© 2020 The Authors New Phytologist © 2020 New Phytologist Trust.)

Details

Language :
English
ISSN :
1469-8137
Volume :
230
Issue :
1
Database :
MEDLINE
Journal :
The New phytologist
Publication Type :
Academic Journal
Accession number :
33197279
Full Text :
https://doi.org/10.1111/nph.17082