Biogeosciences
Biogeosciences
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Articles | Volume 15, issue 9
Articles | Volume 15, issue 9
https://doi.org/10.5194/bg-15-2743-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-15-2743-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 15, issue 9
Research article
 | 
07 May 2018
Research article |  | 07 May 2018

Massive carbon addition to an organic-rich Andosol increased the subsoil but not the topsoil carbon stock

Antonia Zieger, Klaus Kaiser, Pedro Ríos Guayasamín, and Martin Kaupenjohann

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Latest update: 20 Nov 2024
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Short summary
We tested a current theory, which proposes an upper limit for organic carbon (OC) stocks independent of increasing carbon input for a soil with already large OC stocks. The soil received a large additional carbon input as sawdust. In response, only the OC stock in 25–50 cm depth increased significantly. We assume, that due to saturation in 0–25 cm, added OC migrates downwards and becomes retained in 25–50 cm. This indicates the possibility to sustainably increase already large OC stocks further.
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