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| Titel |
Litter contribution to soil organic carbon in the processes of agriculture abandon |
| VerfasserIn |
A. Novara, J. Rühl, T. La Mantia, L. Gristina, S. La Bella, T. Tuttolomondo |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1869-9510
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| Digitales Dokument |
URL |
| Erschienen |
In: Solid Earth ; 6, no. 2 ; Nr. 6, no. 2 (2015-04-24), S.425-432 |
| Datensatznummer |
250115441
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| Publikation (Nr.) |
 copernicus.org/se-6-425-2015.pdf |
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| Zusammenfassung |
The mechanisms of litter decomposition, translocation and stabilization into
soil layers are fundamental processes in the functioning of the ecosystem,
as they regulate the cycle of soil organic matter (SOM) and CO2
emission into the atmosphere. In this study the contribution of litters of
different stages of Mediterranean secondary succession on carbon
sequestration was investigated, analyzing the role of earthworms in the
translocation of SOM into the soil profile. For this purpose the δ13C
difference between meadow C4-C soil and C3-C litter was used in a field
experiment. Four undisturbed litters of different stages of succession (45,
70, 100 and 120 since agriculture abandon) were collected and placed on the
top of isolated C4 soil cores.
The litter contribution to C stock was affected by plant species and it
increased with the age of the stage of secondary succession. One year after
the litter position, the soil organic carbon increased up to 40% in
comparison to soils not treated with litter after 120 years of abandon.
The new carbon derived from C3 litter was decomposed and transferred into
soil profile thanks to earthworms and the leaching of dissolved organic
carbon. After 1 year the carbon increase attributed to earthworm activity
was 6 and 13% in the soils under litter of fields abandoned
for 120 and 45 years, respectively. |
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