Articles | Volume 18, issue 3
https://doi.org/10.5194/bg-18-1241-2021
https://doi.org/10.5194/bg-18-1241-2021
Research article
 | 
16 Feb 2021
Research article |  | 16 Feb 2021

Age distribution, extractability, and stability of mineral-bound organic carbon in central European soils

Marion Schrumpf, Klaus Kaiser, Allegra Mayer, Günter Hempel, and Susan Trumbore

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Cited articles

Aran, D., Gury, M., and Jeanroy, E.: Organo-metallic complexes in an Andosol: a comparative study with a Cambisol and Podzol, Geoderma, 99, 65–79, https://doi.org/10.1016/S0016-7061(00)00064-1, 2001. 
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Bundt, M., Jaggi, M., Blaser, P., Siegwolf, R., and Hagedorn, F.: Carbon and nitrogen dynamics in preferential flow paths and matrix of a forest soil, Soil Sci. Soc. Am. J., 65, 1529–1538, https://doi.org/10.2136/sssaj2001.6551529x, 2001. 
Butnor, J. R., Samuelson, L. J., Johnsen, K. H., Anderson, P. H., González Benecke, C. A., Boot, C. M., Cotrufo, M. F., Heckman, K. A., Jackson, J. A., Stokes, T. A., and Zarnoch, S. J.: Vertical distribution and persistence of soil organic carbon in fire-adapted longleaf pine forests, Forest Ecol. Manage., 390, 15–26, https://doi.org/10.1016/j.foreco.2017.01.014, 2017. 
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A large amount of organic carbon (OC) in soil is protected against decay by bonding to minerals. We studied the release of mineral-bonded OC by NaF–NaOH extraction and H2O2 oxidation. Unexpectedly, extraction and oxidation removed mineral-bonded OC at roughly constant portions and of similar age distributions, irrespective of mineral composition, land use, and soil depth. The results suggest uniform modes of interactions between OC and minerals across soils in quasi-steady state with inputs.
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