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Poster communications

Protein and energy affect splanchnic and mammary metabolisms and drive amino acid use in dairy cows

Abstract : Balancing rations for essential amino acids (AA) to improve efficiency of utilisation (Eff) of N requires a better knowledge of AA use by different tissues under various nutritional conditions. Effects of infusion of AA (AAinf) and glucose (Glcinf), in a 2×2 factorial arrangement, were tested using 5 cows in a 4×4 Latin Square plus one cow. At the end of each period, splanchnic, mammary and other peripheral tissue metabolisms of AA were measured. There was no AAinf×Glcinf interaction on most of the measured parameters. Milk protein yield (MPY) increased with AAinf and Glcinf. With AAinf, catabolism by portal-drained viscera (PDV) and mammary gland of group 2 AA (Ile, Leu, Lys, and Val) increased leading to a decreased Eff. In contrast, with Glcinf, liver removal of His + Met + Phe (HMP) decreased, improving their Eff.
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Poster communications
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https://hal.archives-ouvertes.fr/hal-02292476
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Submitted on : Thursday, September 19, 2019 - 8:07:52 PM
Last modification on : Wednesday, April 6, 2022 - 4:08:16 PM

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Cléo Omphalius, Sophie Lemosquet, D. R. Ouellet, L. Bahoul, Helène Lapierre. Protein and energy affect splanchnic and mammary metabolisms and drive amino acid use in dairy cows. 6. International Symposium on Energy and Protein Metabolism (Isep), Sep 2019, Belo Horizonte, Brazil. Wageningen Academic Publishers, Publication - European Association for Animal Production (EAAP), 138, 2019, Publication - European Association for Animal Production (EAAP). ⟨10.3920/978-90-8686-891-9_65⟩. ⟨hal-02292476⟩

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