DREEM: model on enteric methane emissions in sheep farms
| Autor: | Eugène, Maguy, Mansard, Laura, Vigan, Aurore, Meuret, Michel, Lasseur, Jacques, Benoit, Marc, Lecomte, Paul |
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| Přispěvatelé: | ProdInra, Migration, Unité Mixte de Recherche sur les Herbivores - UMR 1213 (UMRH), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut National de la Recherche Agronomique (INRA)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, 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), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Institut National de la Recherche Agronomique (INRA)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS) |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | 67. Annual Meeting of the European Association for Animal Production (EAAP) 67. Annual Meeting of the European Association for Animal Production (EAAP), Aug 2016, Belfast, United Kingdom. Wageningen Academic Publishers, 1 p., 2016 |
| Popis: | International audience; Ruminant livestock systems are significant sources of greenhouse gases. Herd mobility is known as a major adaptation strategy regarding seasonal availability of forage resources. The present study aims at quantifying enteric methane (CH4) emissions from French Mediterranean sheep farming systems, especially the use of diversified pastoral feed resources, using a simulation model (Diversity of feed REsources and Enteric Methane emissions, DREEM). DREEM model was developed to estimate animal enteric CH4 emissions from empirical equations and to be subsequently integrated, as a sub-model, to an economic and GHG balance model (OSTRAL) at the whole farm level. Several equations were chosen from literature data to estimate enteric CH4 emissions. Forage and Feed natures, animal feeding level and performances were referenced according to INRA feeding system and tables. DREEM was applied to the analysis of four case studies covering main contrasted mobility and farming systems situations: from sedentary to highly mobile pastoral systems, in the French Mediterranean area. Overall, equation 1 always gave higher enteric CH4 estimates than the 3 other ones and small variations were observed between the four equations as the standard deviation within each farming system varied from 2.0 to 3.1 g/kg DMI and from 1.1 and 1.6 kg/head/year. At the individual level, enteric CH4 emissions (g / d) of ewes in sedentary system are higher than those of ewes in other systems. These differences are mainly due to differences in animal feeding level and feed resources characteristics in these systems. DREEM model could estimate enteric CH4 emissions at the animal level and be combined to OSTRAL. |
| Databáze: | OpenAIRE |
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