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Estimation of dietary threonine requirement using plasma amino acid concentrations in mature thoroughbreds
Authors:Tatsuyuki Yoshida  Yoshiyuki Ohta
Affiliation:Department of Animal Science, Nippon Veterinary and Life Science University, Musashino, Japan
Abstract:The experiment was conducted to estimate dietary threonine (Thr) requirement using plasma amino acid concentrations as a criterion in mature thoroughbreds. Four adult thoroughbreds were used, and a 4 × 4 Latin square design was used for four dietary Thr levels. Plasma Thr concentration was constant until 0.41%, and then increased rapidly with increasing dietary Thr levels. The Thr requirement was estimated to be 67% of lysine with plasma Thr concentration at four Thr levels.
Keywords:plasma amino acid  requirement  thoroughbred  threonine
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