| Title: | "Indirect measures of methane emissions of Sahelian zebu cattle in West Africa, role of environment and management" |
| Author(s): | Bois B; Morgavi DP; Gonzalez-Garcia E; Genestoux L; Lecomte P; Ickowicz A; Doreau M; |
| Address: | "CIRAD, UMR SELMET, Dakar, Senegal. bois.berenicea@gmail.com. SELMET, Univ Montpellier, CIRAD, INRAE, Montpellier SupAgro, Montpellier, France. bois.berenicea@gmail.com. PPZS, Pastoral system and dry lands, Dakar, Senegal. bois.berenicea@gmail.com. Universite Clermont Auvergne, INRAE, VetAgro Sup, UMR Herbivores, F-63122, Saint-Genes-Champanelle, France. SELMET, Univ Montpellier, INRAE, Montpellier SupAgro, Montpellier, France. CIRAD, UMR SELMET, Dakar, Senegal. SELMET, Univ Montpellier, CIRAD, INRAE, Montpellier SupAgro, Montpellier, France. PPZS, Pastoral system and dry lands, Dakar, Senegal. CIRAD, UMR SELMET, F-34398, Montpellier, France" |
| DOI: | 10.1007/s11250-020-02212-x |
| ISSN/ISBN: | 1573-7438 (Electronic) 0049-4747 (Linking) |
| Abstract: | "In Northern Senegal, traditional cattle management systems (TRAD) which depend on natural forages coexist with intensified systems (INT) which rely on periodic supplementation with crop residues and local concentrates. This study aims to estimate the effects of seasons and management systems on the methane emissions of Gobra zebu, in relation to the diet's chemical composition and feed intake. Six Gobra zebu cows per management system were individually monitored over 10 months, diet and faeces were sampled each season and their chemical composition and dry matter intake (DMI) were predicted by near infrared spectroscopy. Each diet was fermented in vitro to assess methane production and volatile fatty acid concentration. The DMI and digestible organic matter intake (DOMI) decreased (P < 0.0001) during the dry seasons for both systems in the same range, but INT improved the crude protein of the diets (P < 0.0001). Enteric methane production (mmol.g(-1) dry matter) was lower for TRAD than INT, except during the rainy season when TRAD cows experienced a higher increase (P = 0.002). The methanogenic potential (methane production in vitro x DMI) varied with the seasons and the system with more accentuated variations for TRAD (P < 0.0001). Methanogenic potential shows true reflection of the effects of the seasons and management systems. The results highlight that enteric methane emissions varied with seasonal changes and that intensifying the diet induced no mitigating effect" |
| Keywords: | Air Pollutants/*analysis Animal Feed/*analysis Animal Husbandry/*methods Animals Cattle/*metabolism Diet/veterinary *Environmental Monitoring Feeding Behavior Female Greenhouse Gases/*analysis Methane/*analysis/metabolism Seasons Senegal Cattle management; |
| Notes: | "MedlineBois, Berenice Morgavi, Diego P Gonzalez-Garcia, Eliel Genestoux, Lucette Lecomte, Philippe Ickowicz, Alexandre Doreau, Michel eng 2020/01/26 Trop Anim Health Prod. 2020 Jul; 52(4):1953-1960. doi: 10.1007/s11250-020-02212-x. Epub 2020 Jan 24" |
