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Article: Milk protein response to abomasal or mesenteric vein essential amino acid infusion in lactating dairy cows
- Article from:
- Journal of Dairy Science
- Article date:
- May 1, 2002
- Author:
CopyrightCopyright American Dairy Science Association May 2002. Provided by ProQuest LLC. (Hide copyright information)
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ABSTRACT
Previous experiments performed at our location suggested that the milk protein response to infusions of mixed essential amino acids (EAA) was greater when these were supplied via intravenous rather than abomasal or duodenal routes. However, as far as we are aware there have been no direct comparisons of the milk protein response to site of EAA provision in the same animals. Our objective was to directly compare the milk protein responses when cows were given mixtures of EAA provided via abomasal or mesenteric vein infusions. Four multiparous, ruminally cannulated, multicatheterized Holstein x Friesian cows averaging 18 wk postpartum were fed dehydrated alfalfa, grass silage, and ...