Détail de la notice
Titre du Document
Organic matter composition and degree of humification in lignite-rich mine soils under a chronosequence of pine
Auteur(s)
RUMPEL C. ; KÖGEL-KNABNER I. ; HÜTTL R. F. ; ...
Résumé
In the Lusatian mining district, in the eastern part of the Federal Republic of Germany, organic matter of reclaimed mine soils consists of a mixture of lignite and recently formed soil organic matter (recent carbon). The aim of the study was to investigate the recent carbon accumulation and the degree of humification of a chronosequence of young mine soils under forest. The lignite content of the forest floor, Ai (0-5 cm) and Cv horizons (1 m depth) was determined by 14C activity measurements and the structural composition of the organic matter was characterised by 13C CPMAS NMR spectroscopy. To obtain a characterisation of the degree of humification, the soil samples were analysed for the content of polysaccharides, proteins, lignin and lipids by wet chemical methods. 14 C activity measurements indicate that at the oldest site, comparable amounts of carbon accumulated in the first few centimetres of the soil profile than in natural forest soils. 13C CPMAS NMR spectra of the organic matter in the Ai horizons of the three soil profiles were dominated by aromatic and alkyl carbon species characteristic for lignite, but indicated as well an increasing contribution of carbon species from decomposing plant litter with soil age. When the results from wet chemical analyses were normalised to the total carbon content no changes with age could be noticed. After normalisation of the amount of litter compounds to the recent carbon content, the carbon identified
Editeur
Springer
Type du document
Conférence : International symposium [Organic matter application and element turnover in disturbed terrestrial ecosystems], Cottbus, DEU, 1997-11-13
Identifiant
ISSN : 0032-079X CODEN : PLSOA2
Source
Plant and soil A. 1999, vol. 213, n° 1-2, pp. 161-168 [bibl. : 26 ref.]
Langue
Anglais
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