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Effet du réseau bocager sur l'organisation des sols. Redistributions des sols et stockage en carbone organique

Abstract : The effect of hedgerow network on soil organisation at landscape scale is still unclear as most studies have been done in 2D, focusing on situations with hedges perpendicular to the steepest slope. Therefore, extrapolation at the whole landscape induces a wrong estimation of the hedgerow network effect at the landscape scale.
Aims of this study were to understand and quantify at landscape scale, the effect of the hedgerow network on soil organisation and on associated soil organic carbon stocks, and to describe the dynamic of spatial processes responsible for these organisations.
The adopted strategy has combined three complementary approaches. First a field study was carried out in an hedgerow network landscape historically documented, having contrasted topographical and landscape situations. This, in order to obtain a spatial characterisation of hedgerow networks which takes into account human activities and the three dimensional nature of the pedological cover at landscape scale.
We combined relative dating approaches (analysis of historical documents and of soil geometry) and absolute dating techniques (14-Carbon, 137-Caesium), complementary to the spatial approaches. These techniques allowed us to date the organo-mineral horizons of the soil cover and to analyse the dynamic of processes responsible for modifications of the soil spatial organisation.
Taking into account this temporal dimension was necessary to improve our comprehension of soil redistribution processes and to simulate in space and time the landscape evolution according to different soil use and management scenarios.
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https://tel.archives-ouvertes.fr/tel-00130432
Contributor : Isabelle Dubigeon <>
Submitted on : Monday, February 12, 2007 - 11:49:29 AM
Last modification on : Monday, July 6, 2020 - 3:38:31 PM
Long-term archiving on: : Tuesday, April 6, 2010 - 9:18:00 PM

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  • HAL Id : tel-00130432, version 1

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Stéphane Follain. Effet du réseau bocager sur l'organisation des sols. Redistributions des sols et stockage en carbone organique. Sciences de la Terre. Agrocampus - Ecole nationale supérieure d'agronomie de rennes, 2005. Français. ⟨tel-00130432⟩

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