Articles | Volume 17, issue 12
https://doi.org/10.5194/bg-17-3099-2020
https://doi.org/10.5194/bg-17-3099-2020
Research article
 | 
18 Jun 2020
Research article |  | 18 Jun 2020

Relevance of aboveground litter for soil organic matter formation – a soil profile perspective

Patrick Liebmann, Patrick Wordell-Dietrich, Karsten Kalbitz, Robert Mikutta, Fabian Kalks, Axel Don, Susanne K. Woche, Leena R. Dsilva, and Georg Guggenberger

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Latest update: 20 Nov 2024
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Short summary
We studied the contribution of litter-derived carbon (C) in the formation of subsoil organic matter (OM). Soil core sampling, 13C field labeling, density fractionation, and water extractions were used to track its contribution to different functional OM fractions down to the deep subsoil. We show that while migrating down the soil profile, OM undergoes a sequence of repeated sorption, microbial processing, and desorption. However, the contribution of litter-derived C to subsoil OM is small.
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