title: [Amino acid composition of the nitrogen flow entering the duodenum in the dairy cow].
abstract: Effects of diet on amino acid (AA) composition of duodenal contents were tested in high-yielding dairy cows. For the same non-ammonia nitrogen flow (491 g/d) hay diet gave higher contents in lysine, valine and leucine than maize silage diet. To predict such differences, an attempt is made to estimate duodenal AA content from the AA content of dietary or "by pass" proteins and from recent data on protein digestion.
authors.affiliation: Station de Recherches sur la Vache laitière, I.N.R.A., Saint Gilles, L'Hermitage, France.
authors.forename: L
authors.initials: L
authors.lastname: Le Henaff
authors.forename: H
authors.initials: H
authors.lastname: Rulquin
authors.forename: J L
authors.initials: JL
authors.lastname: Peyraud
mesh_terms: D000596:Amino Acids / Q000032:analysis / Q000378:metabolism*; D000821:Animal Feed; D000818:Animals; D002417:Cattle / Q000378:metabolism*; D004386:Duodenum / Q000032:analysis*; D005260:Female; D005766:Gastrointestinal Contents / Q000032:analysis*; D009584:Nitrogen / Q000378:metabolism*
chemical_list: D000596:Amino Acids; D009584:Nitrogen
vernacular_title: Composition en acides aminés du flux d'azote entrant dans le duodénum chez la vache laitière.