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

The New Phytologist
Feike A DijkstraWeixin Cheng

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.

References

Sep 11, 2007·Ecology·Joseph M CraineNoah Fierer
Dec 17, 2010·Trends in Ecology & Evolution·Yiqi Luo, Ensheng Weng
Oct 8, 2011·Nature·Michael W I SchmidtSusan E Trumbore
Aug 3, 2013·Frontiers in Microbiology·Feike A DijkstraJack A Morgan
Aug 15, 2013·The New Phytologist·Francesca HopkinsJens-Arne Subke
Aug 21, 2013·The New Phytologist·Weixin ChengJulie D Jastrow
Nov 26, 2014·Global Change Biology·Adrien C FinziRichard P Phillips
Jul 18, 2019·Nature Communications·A N KravchenkoY Kuzyakov

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