TITLE:
Metabolizable Amino Acid Requirements of Feedlot Calves
AUTHORS:
M. F. Montaño, W. Tejada, J. Salinas, R. A. Zinn
KEYWORDS:
Amino Acid, Protein, Metabolism, Steer, Feedlot
JOURNAL NAME:
Open Journal of Animal Sciences,
Vol.6 No.2,
April
28,
2016
ABSTRACT: One hundred ninety-two crossbred steers (229 kg) were used to evaluate the influence of metabolizable amino acid intake on growth performance and health during the initial 42-d receiving period. Treatments consisted of four levels of metabolizable lysine (23, 24, 25 and 26 g/kg diet DM). Morbidity averaged 36%, and was not affected (P > 0.20) by treatments. No steers died during the study. Increasing the metabolizable lysine supply increased DMI, ADG, gain efficiency, and dietary NE (linear effect, P