Assessment of Intestinal Amino Acid Availability in Cattle by Use of the Precision-Fed Cecectomized Rooster Assay

Evan Titgemeyer, Neal Merchen, Yanming Han, Carl Parsons, David Baker

Research output: Contribution to journalArticle

Abstract

The digestibilities of amino acids in duodenal digesta of steers were measured using a precision-fed cecectomized rooster assay. Freeze-dried duodenal digesta from steers fed five different diets were utilized. Amino acids present in digesta of steers fed diets supplemented with corn gluten meal were more digestible than those from digesta of steers fed diets supplemented with soybean meal, blood meal, fish meal, or no true protein source. Measurements of amino acid digestibility in the cecectomized rooster were similar to those obtained previously when measured with reference to chromic oxide in steers fitted with duodenal and ileal cannulae, suggesting that the precision-fed cecectomized rooster assay is an appropriate technique for estimating small intestinal digestibility of amino acids in cattle.

Original languageEnglish (US)
Pages (from-to)690-693
Number of pages4
JournalJournal of Dairy Science
Volume73
Issue number3
DOIs
StatePublished - Jan 1 1990

Keywords

  • amino acids, digestibility, small intestine

ASJC Scopus subject areas

  • Food Science
  • Animal Science and Zoology
  • Genetics

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