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Soil organic matter formation along a chronosequence in the Morteratsch proglacial area (Upper Engadine, Switzerland)

Auteur(s) et Affiliation(s)

EGLI, M.
Dep. of Geography, Univ., Zurich, Suisse
MAVRIS, C.
Dep. of Geography, Univ., Zurich, Suisse
MIRABELLA, A.
IST. Sperimentale per lo studio e la difesa del Suelo, Centro di ricerca per l'Agrobiologia e la Pedologia, Firenze, Italie
GIACCAI, D.
IST. Sperimentale per lo studio e la difesa del Suelo, Centro di ricerca per l'Agrobiologia e la Pedologia, Firenze, Italie


Description :
The AA. study the formation of soil organic matter and its different fractions within a time span of 0–150 years. They investigated a chronosequence of very young soils in the proglacial area Morteratsch (Swiss Alps) to derive time-trends of soil organic matter accumulation and evolution. With time, the quality of soil organic matter changed : a decrease of hydrophobicity, an increase in aromatic compounds in the bulk soil and a decrease in phenolic functional groups in the heaviest density fraction were detectable with increasing age. In general, stable organic matter as well as the density fraction > 2 g/cm3 had a low C/N ratio and were enriched in proteinaceous materials. The adsorption of proteinaceous materials points to a strong organo-mineral association. This process has existed since the very beginning of soil formation.


Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2010, vol. 82, n°. 2, p. 61-69, nombre de pages : 9, Références bibliographiques : 43 ref.

Date :
2010

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais
Droits :
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