Local feeding strategies allow to reduce enteric methane emission from cattle in Sahel

Gbenou Gérard Xavier, Assowna M.H., Martin C., Bastianelli Denis, Bonnal Laurent, Kiendrebeogo T., Sib Ollo, Bois Bérénice, Sanogo Souleymane, Dossa Luc Hippolyte. 2023. Local feeding strategies allow to reduce enteric methane emission from cattle in Sahel. In : Book of Abstracts of the 74th Annual Meeting of the European Federation of Animal Science. EAAP. Wageningen : Wageningen Academic Publishers, p. 701. (EAAP Book of Abstracts, 29) ISBN 978-90-8686-384-6 Annual Meeting of the European Federation of Animal Science (EAAP). 75, Lyon, France, 26 Août 2023/1 Septembre 2023.

Résumé : In Africa, a large diversity of diets (forage + staple food crop residues or other agricultural by products) is used by cattle herders in different production systems. It is reported that feeding strategies could help to reduce enteric methane (eCH4) in ruminants by up to 55%. In order to test different feeding strategies, a trial was carried out (CIRDES, Burkina Faso) on 10 Sudanese peulh zebu steers (32 months of age) with live weight (LW) 147±5.8 kg (i.e. 0.59 Tropical Livestock Unit). Animals were kept in individual box and were fed at 3.5% LW with natural pasture and crop by products (75:25, DM bas is). Individual eCH4 (Green Feed system) and total tract digestibility were measured. The 6 main crop by products used in cattle diet were identified with a survey from fam1ers: legume haulm-based diets (cowpea and peanut haul ms), and ce real straw-based diets (maize, sorghum, millet and rice straws). For each crop by product, the experiment consisted in 3 weeks, including 2 weeks of feed adaptation and I week of data collection. Basal diets consisted in natural forage hay (CTL hay) to test cereal crops, and Panicum maximum hay (CTL Pm) to test legume crops. Dry matter intake (DMI, g/kg LW) were on ave rage 18.0± 1.92 in ce real straw diets vs 16.4±2.06 in CTL hay; and 25 .5± 1.69 in legume haulm diets vs 2 1.7±2 .29 in CTL Pm. The DM digestibility(%) were 48 .1 ±3.0 I in cereal straw diets vs 46.0±3.05 in CTL hay; and in legume haulm diets 49.8± 1.4 vs 48.7±6.1 in CTL Pm. Intake content was lower in fibre for cereal straw and legume haulm diets compared to their control (NDF, g/kg DMI, 664±26.7 and 6 11 ±8.5 vs 734± 13.6 and 712± 14.0, respectively). Amounts of eCH4 (g/kg DMI) emitted were 26.5±6.85 in cereal straw diets vs 30.6± 7 .17 in CTL hay; and 24.0±4.26 in legume haulm diets vs 27. 9±4.66 CTL Pm. Complementation with cereal and legume crops reduced by 13 and 21 % eCH4 yield.

Auteurs et affiliations

• Gbenou Gérard Xavier, CIRAD-ES-UMR SELMET (FRA)
• Assowna M.H., CIRDES (BFA)
• Martin C., INRAE (FRA)
• Bastianelli Denis, CIRAD-ES-UMR SELMET (FRA) ORCID: 0000-0002-6394-5920
• Bonnal Laurent, CIRAD-ES-UMR SELMET (FRA) ORCID: 0000-0001-5038-7432
• Kiendrebeogo T., CNRST (BFA)
• Sib Ollo, CIRAD-ES-UMR SELMET (BFA) ORCID: 0000-0001-6382-6692
• Bois Bérénice, CIRAD-ES-UMR SELMET (FRA)
• Sanogo Souleymane, CIRDES (BFA)
• Dossa Luc Hippolyte, UAC (BEN)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/609332/)

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