Lignin signature as a function of land abandonment and erosion in dry luvisols of SE Spain

Auteur(s) et Affiliation(s)



Description :
To get insight into the evolution of soil organic carbon (SOC) composition along a land use and topographical gradient, differences in lignin contribution to SOC were determined at different soil depths in the Mediterranean region of SE Spain. Three deposition locations, three positions on the hillslope and three zones on top of the hillslope (shoulder) were selected on croplands and fields that were abandoned since 10 and 50 years, respectively. Land use change was identified as a driver for the observed gradients in lignin, SOC and N in these semi-arid ecosystems. Abandoned sites were highest in soil lignin, which could be related to the higher lignin input. For deposition and shoulder positions lignin was less degraded at abandoned sites compared to cultivated sites. This study indicates that lignin preservation is enhanced by low soil N availability (high C:N ratio).


Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2012, vol. 93, p. 78-86, nombre de pages : 9, Références bibliographiques : 42 ref.

Date :
2012

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