Effect of the nature of energy (lipids vs. carbohydrates) on enteric methane emission and dairy performance in cows fed grass silage-based diets - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Italian Journal of Animal Science Année : 2023

Effect of the nature of energy (lipids vs. carbohydrates) on enteric methane emission and dairy performance in cows fed grass silage-based diets

Résumé

This work aimed to investigate the effect of energy nature (lipids vs. carbohydrates) on enteric methane emission (eCH4 ) and performance in dairy cows fed grass silage-based diets. Eight multiparous Holstein cows were used in a 4 x 4 Latin square design, with 4 experimental periods of 28 days each. Cows were fed with 4 iso-energetic diets based on grass silage and supplemented with different levels of rapeseed oil (RO) (0, 1.5, 3.0, 4.5% of dietary dry matter (DM), Control, RO-low, RO-medium, RO-high diets, respectively) in substitution of starch from concentrate. Dairy performance, total-tract digestibility, and rumen parameters were measured when animals were in individual respiration chambers for quantifying eCH4. Intake of DM decreased with RO-high compared to other diets. Methane emissions were lowered similarly with all diets containing RO compared to Control (on average, -19% in g/d, -13% in g/kg DMI, -21% in g/kg milk). Ruminal propionate proportion was higher, whereas that of butyrate was lower with RO-high compared to the other diets. Milk yield was higher with RO-low and RO-medium, and was lower for RO-high compared to Control. Milk C16:0 concentration was lower, and C18:1c9, C18:1t11, and other rumen biohydrogenation intermediate concentrations were higher with diets containing RO compared to Control. The shift from the C18:1t11 to C18:1t10 biohydrogenation pathway is in agreement with the milk fat depression observed with RO-medium and RO-high. The inclusion of RO at 1.5% was the best compromise between eCH4, feed efficiency, and milk nutritional quality in cows fed grass silage-based diets. Energy substitution of carbohydrate (mainly starch) by rapeseed oil reduced methane emissions in dairy cows fed grass silage-based diets (up to -23% in g/d) Rapeseed oil content above 3% induced milk fat depression and impaired milk fatty acid profile The inclusion of 1.5% rapeseed oil was the best compromise to reduce methanogenesis (-15% in g/d) and improve dairy performance and milk nutritional quality
Fichier principal
Vignette du fichier
Effect of the nature of energy lipids vs. carbohydrates on enteric methane emission and dairy performance in cows fed grass silage-based diets.pdf (1.38 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-04331213 , version 1 (08-12-2023)

Licence

Paternité

Identifiants

Citer

Cécile Martin, Anne Ferlay, Mohammed Benaouda, Mauro Coppa, Maguy Eugène. Effect of the nature of energy (lipids vs. carbohydrates) on enteric methane emission and dairy performance in cows fed grass silage-based diets. Italian Journal of Animal Science, 2023, 22 (1), pp.1257 - 1267. ⟨10.1080/1828051x.2023.2244525⟩. ⟨hal-04331213⟩
23 Consultations
6 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More