A.S. Series 73-15
Previous studies have shown near maximum performance from laying hens when a 16% protein diet diluted to 10% protein with glucose was supplemented with 0.15% DL-methionine, 0.19% L-lysine and 0.04% DL-tryptophan. A supplement of 0.20% DL-isoleucine caused the hens to produce a small but significantly increased number of eggs. Glycine at 0.5% tended to favor the response from Isoleucine, suggesting Its requirement for maximum utilization of amino acids.
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Department of Animal Science, Agricultural Experiment Station, South Dakota State University
Choudbury, H. and Carlson, C. W., "Amino Acid Supplementation of Low Protein Layer Diets With Glycine, Glutamic Acid, Threonine and Valine" (1973). South Dakota Poultry Field Day Proceedings and Research Reports, 1973. 4.