Lysine, Methionine and Glycine Requirements of Japanese Quail to Five Weeks of Age

INTRODUCTION FEW studies of the amino acid requirements of Japanese quail have been reported. Donaldson (1967) found the requirements for the total sulfur amino acid to be 0.78% in a practical diet containing 25% protein, the glycine requirement to be 1.28% in a purified diet containing 29% protein, and the lysine requirement was met at 1.35% of a practical diet containing 25% protein. Amino acid requirements of Bobwhite quail and Ringneck pheasants, members of the same family as Coturnix, have been reported; Baldini et al. (1953) suggested a lysine requirement for young Bobwhite quail of 1.3% of the diet when the protein level was 20–24%. Scott et al. (1963) showed the total sulfur amino acid requirements of Bobwhite quail and Ringneck pheasants to be 3.66% of the protein in a practical corn-soybean meal diet. Scott and Reynolds (1949) found in studies with pheasant chicks that the glycine requirement was…