Agritrop
Home

Soil carbon stocks after conversion of Amazonian tropical forest to grazed pasture: Importance of deep soil layers

Stahl Clément, Freycon Vincent, Fontaine Sébastien, Dezécache Camille, Ponchant Lise, Picon-Cochard Catherine, Klumpp Katja, Soussana Jean-François, Blanfort Vincent. 2016. Soil carbon stocks after conversion of Amazonian tropical forest to grazed pasture: Importance of deep soil layers. Regional Environmental Change, 16 (7) : pp. 2059-2069.

Journal article ; Article de recherche ; Article de revue à facteur d'impact
[img] Version Online first - Anglais
Access restricted to CIRAD agents
Use under authorization by the author or CIRAD.
Stahl et al. 2016 Regional Environmental Change.pdf

Télécharger (794kB) | Request a copy
[img] Published version - Anglais
Access restricted to CIRAD agents
Use under authorization by the author or CIRAD.
art%3A10.1007%2Fs10113-016-0936-0.pdf

Télécharger (938kB) | Request a copy

Quartile : Q1, Sujet : ENVIRONMENTAL STUDIES / Quartile : Q2, Sujet : ENVIRONMENTAL SCIENCES

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Géographie-Aménagement-Urbanisme-Architecture

Abstract : Recent studies suggest that carbon (C) is stored in the topsoil of pastures established after deforestation. However, little is known about the long-term capacity of tropical pastures to sequester C in different soil layers after deforestation. Deep soil layers are generally not taken into consideration or are underestimated when C storage is calculated. Here we show that in French Guiana, the C stored in the deep soil layers contributes significantly to C stocks down to a depth of 100 cm and that C is sequestered in recalcitrant soil organic matter in the soil below a depth of 20 cm. The contribution of the 50–100 cm soil layer increased from 22 to 31 % with the age of the pasture. We show that long-term C sequestration in C4 tropical pastures is linked to the development of C3 species (legumes and shrubs), which increase both inputs of N into the ecosystem and the C:N ratio of soil organic matter. The deep soil under old pastures contained more C3 carbon than the native forest. If C sequestration in the deep soil is taken into account, our results suggest that the soil C stock in pastures in Amazonia would be higher with sustainable pasture management, in particular by promoting the development of legumes already in place and by introducing new species. (Résumé d'auteur)

Mots-clés Agrovoc : Forêt, forêt tropicale, séquestration du carbone, Cycle du carbone, Déboisement, Pâturages, Matière organique du sol, Couverture végétale, Écosystème forestier, Plante d'abroutissement, Plante fourragère, Utilisation des terres

Mots-clés géographiques Agrovoc : Guyane française

Mots-clés libres : Carbone, Sol, Forêt, Pâturage, Guyane

Classification Agris : K01 - Forestry - General aspects
L01 - Animal husbandry
P33 - Soil chemistry and physics
P01 - Nature conservation and land resources

Champ stratégique Cirad : Axe 6 (2014-2018) - Sociétés, natures et territoires

Auteurs et affiliations

  • Stahl Clément, University of Antwerp (BEL)
  • Freycon Vincent, CIRAD-ES-UPR BSef (FRA)
  • Fontaine Sébastien, INRA (FRA)
  • Dezécache Camille
  • Ponchant Lise
  • Picon-Cochard Catherine, INRA (FRA)
  • Klumpp Katja, INRA (FRA)
  • Soussana Jean-François, INRA (FRA)
  • Blanfort Vincent, CIRAD-ES-UMR SELMET (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/581866/)

View Item (staff only) View Item (staff only)

[ Page générée et mise en cache le 2021-02-26 ]