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Concentrations and Flow of Free Amino Acids in Ruminal and Duodenal Liquid of Dairy Cows in Relation to Feed Composition,Time of Feeding and Level of Feed Intake |
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| Authors: | Harald Volden Weiert Velle Øystein V. Sjaastad Arnfinn Aulie Odd Magne Harstad |
| Affiliation: | 1. Department of Animal Science , Agricultural University of Norway , P.O. Box 5025, NO-1432, ?s, Norway;2. Department of Biochemistry, Physiology and Nutrition, Section Physiology , Norwegian College of Veterinary Medicine , P.O. Box 8146 DEP, Oslo, NO-0033, Norway |
| Abstract: | The main purpose of this study was to examine sources of variation in free amino acids (FAA) in the rumen and their relative contribution to the total duodenal amino acid supply. Six cannulated lactating dairy cows fed three concentrate mixtures differing in ruminally degradable intake protein (101, 114 and 134 g kg-1 dry matter) at two levels of intake (19.3 vs 9.8 kg dry matter day-1 |
| Keywords: | Cattle Free Amino Acids Rumen Degradable Protein Ruminal Outflow |