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Factors influencing carbon stabilization processes in volcanic ash Anthrosols (Tenerife Island, Spain)

AuthorsHernández, Zulimar ; Almendros Martín, Gonzalo ; Gómez Sal, A.
Issue Date2010
PublisherInternational Humic Substances Society
CitationADVANCES IN NATURAL ORGANIC MATTER AND HUMIC SUBSTANCES RESEARCH 2008-2010 Vol. 2:24-27 Proceedings Book of the Communications presented to the 15 th Meeting of the Internatio nal Humic Substances Society Tenerife - Canary Islands. June 27- July 2, 2010:
AbstractThere is a classical controversy concerning the mechanisms controlling the humification process in volcanic ash soils [1]. In general, it is considered that short-range silicates and amorphous oxides play an outstanding role in so il carbon stabilization. Nevertheless, despite the general agreement about the high potential for carbon sequestration in volcanic soils, the biogeochemical processes responsible for such an stabilization are not still completely understood. Whereas some authors have described a predominantl y aromatic character of the humic acids (HAs) formed in allophane-containing soils, other authors have suggested that this aromaticity is but the effect of burning grass residues in the past (e.g. Miscanthus sinensis ) [2], whereas the organic matter could be predominantly aliphatic as results of intense microbial activity in saturated anaerobic soil microcompartments, leading to the accumulation of alkyl, carbohydrate and protein-like constituents
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