Mammary Uptake, Portal-Drained Visceral Flux, and Hepatic Metabolism of Free and Peptide-Bound Amino Acids in Cows Fed Steam-Flaked or Dry-Rolled Sorghum Grain Diets

• Published in: Journal of dairy science Vol. 91; no. 2; pp. 679 - 697
• Main Authors: Tagari, H., Webb, K., Theurer, B., Huber, T., DeYoung, D., Cuneo, P., Santos, J.E.P., Simas, J., Sadik, M., Alio, A., Lozano, O., Delgado-Elorduy, A., Nussio, L., Bittar, C.M.M., Santos, F.
• Format: Journal Article
• Language: English
• Published: Savoy, IL Elsevier Inc 01.02.2008; American Dairy Science Association; Am Dairy Sci Assoc
• Subjects: amino acid; Amino Acids - pharmacokinetics; Animal Feed; Animal productions; Animals; Biological and medical sciences; Cattle - metabolism; Cereal and baking product industries; cow feeding; cows; Cross-Over Studies; dairy cow; dry-rolled sorghum grain; Female; flaked sorghum; flakes; Food industries; free amino acids; Fundamental and applied biological sciences. Psychology; grain sorghum; Hepatic Veins - physiology; Holstein; Intestinal Absorption - physiology; Lactation; Liver - blood supply; Liver - metabolism; liver function; mammary glands; Mammary Glands, Animal - metabolism; metabolic studies; Milk - secretion; Milk Proteins - metabolism; nutrition physiology; peptide; peptide-bound amino acids; portal vein; Portal Vein - physiology; portal-drained visceral fluxes; Random Allocation; rolling; ruminant nutrition; Sorghum; splanchnic tissues; steam-flaked sorghum grain; Terrestrial animal productions; Vertebrates; peptide; dairy cow; amino acid; flaked sorghum; Monocotyledones; Peptides; Dairy cattle; Dry; Gramineae; Angiospermae; Mammary gland; Sorghum (food); Ungulata; Farming animal; Sorghum; Metabolism; Water vapor; Uptake; Vertebrata; Mammalia; Diet; Dairy industry; Cereal; Spermatophyta; Artiodactyla

Our objectives were to measure net fluxes of free AA (FAA) and peptide-bound AA (PBAA) across portal-drained viscera, liver, splanchnic tissues, and mammary tissues, and milk AA output of lactating Holstein cows (n = 8, 86±8 d in milk). Cows were fed an alfalfa-based total mixed ration containing 40...