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Article Dans Une Revue Reproduction Nutrition Development Année : 2002

Rumen escape of methionine and lysine administered intraruminally to growing double-muscled Belgian Blue bulls

Eric Froidmont
  • Fonction : Auteur
Pierre Rondia
  • Fonction : Auteur
André Théwis
  • Fonction : Auteur
Yves Beckers
  • Fonction : Auteur

Résumé

In many dietary conditions, methionine (Met) and lysine (Lys) are the most limiting amino acids (AA) for ruminants. The AA protected from ruminal fermentation are not commercially available, with the exception of Met which is not always economical, especially for meat production. This study measured ruminal escape of free Met and Lys supplemented intraruminally to fast growing bulls. Six double-muscled Belgian Blue bulls, fed a high concentrate diet and fitted with a rumen cannula, received free Met (40 $\mathrm{g}\cdot\mathrm{d}^{-1}$) and free Lys (60 $\mathrm{g}\cdot\mathrm{d}^{-1}$), individually or simultaneously, in a duplicated Latin square design. The mean ruminal escape of Met and Lys reached 37 and 45% respectively, and did not differ if administered separately or together. Plasma Lys and Met concentrations were increased by 504 and 126%, respectively. Substantial proportions of free AA escaped ruminal fermentation and were available for absorption from the small intestine when they were administered at physiologically high levels.
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hal-00900421 , version 1 (11-05-2020)

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Eric Froidmont, Pierre Rondia, André Théwis, Yves Beckers. Rumen escape of methionine and lysine administered intraruminally to growing double-muscled Belgian Blue bulls. Reproduction Nutrition Development, 2002, 42 (6), pp.537-544. ⟨10.1051/rnd:2002039⟩. ⟨hal-00900421⟩
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