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<title lang=en>Does carbon storage of pastures contribute to a climate smart cattle farming after Amazonian deforestation ?</title>
<creator>Blanfort, Vincent</creator>
<creator>Stahl, Clement</creator>
<creator>Fontaine, Sébastien</creator>
<creator>Picon-Cochard, Catherine</creator>
<creator>Freycon, Vincent</creator>
<creator>Blanc, Lilian</creator>
<creator>Bonal, Damien</creator>
<creator>Soussana, Jean-François</creator>
<creator>Lecomte, Philippe</creator>
<creator>Klumpp, Katja</creator>
<contributor>Systèmes d'élevage méditerranéens et tropicaux (UMR SELMET) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD) - Institut National de la Recherche Agronomique (INRA) - Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro) - Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)</contributor>
<contributor>Ecologie des forêts de Guyane (ECOFOG) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD) - Institut National de la Recherche Agronomique (INRA) - Université des Antilles et de la Guyane (UAG) - AgroParisTech - Université de Guyane (UG) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Centre de Coopération Internationale en Recherche Agronomique pour le Développement</contributor>
<contributor>UR 0874 Unité de recherche sur l'Ecosystème Prairial ; Institut National de la Recherche Agronomique (INRA) - Unité de recherche sur l'Ecosystème Prairial (UREP) - Ecologie des Forêts, Prairies et milieux Aquatiques (EFPA)</contributor>
<contributor>UR 105 Biens et services des écosystèmes forestiers tropicaux ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement</contributor>
<contributor>Ecologie et Ecophysiologie Forestières (EEF) ; Institut National de la Recherche Agronomique (INRA) - Université de Lorraine (UL)</contributor>
<contributor>This study was co-funded by CIRAD, INRA, CNES, European regional development found (ERDF 2007 - 013) and Animal Change project (FP7 KKBE 2010 - 4)</contributor>
<source>Building tomorrow’s research agenda and bridging the science-policy gap</source>
<source>Climate-Smart Agriculture 2015 : Global Science Conference</source>
<coverage>Montpellier, France</coverage>
<identifier>hal-01204231</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01204231</identifier>
<source>https://hal.archives-ouvertes.fr/hal-01204231</source>
<source>Climate-Smart Agriculture 2015 : Global Science Conference, Mar 2015, Montpellier, France. 1 p., 2015</source>
<identifier>PRODINRA : 324147</identifier>
<language>en</language>
<subject>[SDE.BE] Environmental Sciences/Biodiversity and Ecology</subject>
<subject>[SDE.MCG] Environmental Sciences/Global Changes</subject>
<type>info:eu-repo/semantics/conferenceObject</type>
<type>Poster communications</type>
<description lang=en>More than 15% of Amazon forest has been converted to pastures these last decades. Some authors argued the world’s permanent pastures (30 % of total land) could potentially offset up to 4% of the global GHG emissions, having a carbon (C) storage potential equal to 0.5 Mg C.ha-1.yr-1(Schulze et al 2009). Accordingly, pastures are good candidates to increase soil uptake C in soil while ensuring a basic food production. Here we would like to assess the effects of tropical forest conversion to cattle pasture in the French Amazonia (French Guiana), by following the long-term dynamics of soil C stocks of permanent tropical pastures (Brachiaria humidicola) after deforestation from 1970. A soil inventory campaign was performed to analyse soil C and N stocks (to 1 m depth) along a pasture chronosequence of 6 months to 36 years old pastures and 4 native forest sites (total 24 sites). The annual C sequestration potential demonstrated by the chronosequence, was compared with eddy covariance flux measurements on 2 pastures and one native forest. Our study shows that old (≥ 24 years) tropical pastures resettle the recurrent C storage observed in native forest. These pastures stored between 1.8 ± 0.5 and 5.3 ± 2.1 tC ha-1 yr-1 compared with 2.6 ± 0.5 tC ha-1 yr-1 for the nearby native forest. Our finding show that old tropical pastures accumulate carbon in soil organic matter, particularly in the deep soil layers (0.2-1 m) and without loss of soil fertility. It suggests that such pastures can be exploited by farmers in the long term with appropriate practices (no fire and no overgrazing, but a mixture of grasses and legumes and a grazing rotation plan). Clearly, efforts to curb deforestation are a priority in order to preserve forest biodiversity and C stocks. But it seems now that, in a climate-smart agriculture way, the current challenge is to manage these deforested areas to maintain the productivity of agricultural ecosystems and in the same time their capacity to mitigate GES.</description>
<date>2015-03-16</date>
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