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PORTAIL D'INFORMATION GÉOGRAPHIQUE

Pyrogenic carbon controls across a soil catena in the Pacific Northwest

Auteur(s) et Affiliation(s)

JAUSS, V.
Dept. of Crop and Soil Sciences, Cornell Univ., Ithaca, Etats-Unis
JOHNSON, M.
Environmental Protection Agency, Western Ecology Division, Corvallis, Etats-Unis
KRULL, E.
CSIRO Land and Water, Glen Osmond, Australie
DAUB, M.
Inst. for Analysis, Dynamics and Modelling, Univ., Stuttgart, Allemagne
LEHMANN, J.
Dept. of Crop and Soil Sciences, Cornell Univ., Ithaca, Etats-Unis
Atkinson Center for a Sustainable Future, Cornell Univ., Ithaca, Etats-Unis


Description :
Using mid-infrared spectroscopy (MIR) and partial least-squares (PLS) analysis in conjunction with ultraviolet photo-oxidation followed by nuclear magnetic resonance spectroscopy (UV-NMR) techniques, pyrogenic carbon (PyC) contents were quantified for samples from soil profiles along a vegetation gradient. Sample locations included different forest types as well as sites under agricultural use. It is highlighted that : PyC concentrations did not change consistently with soil depth; Lower PyC stocks were observed at sites with higher mean annual temperature (MAT) and lower mean annual precipitation (MAP). PyC was only moderately related to non-PyC soil organic carbon (SOC), which comprises plant residues, their decomposition products and soil biota, suggesting largely independent processes influencing production and disappearance.


Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2015, vol. 124, p. 53-59, nombre de pages : 7, Références bibliographiques : 39 ref.

Date :
2015

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

Langue :
Anglais
Droits :
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