Articles | Volume 14, issue 10
https://doi.org/10.5194/bg-14-2627-2017
https://doi.org/10.5194/bg-14-2627-2017
Research article
 | 
24 May 2017
Research article |  | 24 May 2017

Limited protection of macro-aggregate-occluded organic carbon in Siberian steppe soils

Norbert Bischoff, Robert Mikutta, Olga Shibistova, Alexander Puzanov, Marina Silanteva, Anna Grebennikova, Roland Fuß, and Georg Guggenberger

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Cited articles

Balesdent, J., Chenu, C., and Balabane, M.: Relationship of soil organic matter dynamics to physical protection and tillage, Soil Till. Res., 53, 215–230, https://doi.org/10.1016/S0167-1987(99)00107-5, 2000.
Bates, D., Mächler, M., and Bolker, B.: Fitting linear mixed-effects models using lme4, J. Stat. Softw., 1–51, available at: https://arxiv.org/pdf/1406.5823.pdf (last access: 10 May 2017), 2012.
Beare, M. H., Hendrix, P. F., Cabrera, M. L., and Coleman, D. C.: Aggregate-protected and unprotected organic matter pools in conventional- and no-tillage soils, Soil Sci. Soc. Am. J., 58, 787–795, https://doi.org/10.2136/sssaj1994.03615995005800030021x, 1994.
Beniston, J. W., DuPont, S. T., Glover, J. D., Lal, R., and Dungait, J. A. J.: Soil organic carbon dynamics 75 years after land-use change in perennial grassland and annual wheat agricultural systems, Biogeochemistry, 120, 37–49, https://doi.org/10.1007/s10533-014-9980-3, 2014.
Bischoff, N., Mikutta, R., Shibistova, O., Puzanov, A., Reichert, E., Silanteva, M., Grebennikova, A., Schaarschmidt, F., Heinicke, S., and Guggenberger, G.: Land-use change under different climatic conditions: Consequences for organic matter and microbial communities in Siberian steppe soils, Agr. Ecosyst. Environ., 235, 253–264, https://doi.org/10.1016/j.agee.2016.10.022, 2016.
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Short summary
This study set out to determine the quantity of organic carbon (OC) which is protected from microbial decomposition in macro-aggregates of Siberian steppe soils under different land use. Our results imply that the quantity of macro-aggregate protected OC is smaller than in similar steppe ecosystems like the North American prairies. We conclude that the tillage-induced breakdown of macro-aggregates after grassland to arable land conversion has not reduced the OC contents in the studied soils.
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