Biogeosciences
Biogeosciences
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Articles | Volume 23, issue 13
Articles | Volume 23, issue 13
https://doi.org/10.5194/bg-23-4529-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-4529-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 13
Research article
 | 
06 Jul 2026
Research article |  | 06 Jul 2026

Modelling root exudation and plant-microbe interactions under CO2 fertilization in a mature forest

Kristian Schufft, Katrin Fleischer, Anja Rammig, Lin Yu, Mingkai Jiang, Belinda E. Medlyn, and Sönke Zaehle

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Short summary
Root exudation describes a process in which plants allocate labile carbon (C) through roots into soils, thereby influencing microbial C and nutrient cycling. We implemented root exudation in a computer model that simulates ecosystem processes. Increased atmospheric CO2 increased root exudation, but the additional input was partially offset by enhanced microbial respiration. Our research brings new perspectives in modelling soil C and nutrient cycling in forests under increasing CO2.
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