A.S. Series 77-23
It is well agreed among scientists that the better the balance of amino acids in the diet of poultry, the lower the bird's requirement for dietary protein. Generally, a lower protein content should result in lower cost of production and increased economic return. Studies at the South Dakota Agricultural Experiment Station showed that low protein com-soy diets for egg production are deficient in methionine, lysine arid tryptophan. A beneficial response was obtained in a recent study when the combination of isoleucine and valine was added to a 10% protein diet containing additions of methionine, lysine and tryptophan. Furthermore, a genetic influence on amino acid requirements was evident since the three strains of laying hens 'responded differently to amino acid additions. Valine supplementation appeared to correct the amino acid imbalance resulting from the tryptophan addition for one strain and isoleucine corrected the imbalance for the other two strains.
Number of Pages
Department of Animal Science, Agricultural Experiment Station, South Dakota State University
Kashani, A. B. and Carlson, C. W., "Responses of Two Strains to Amino Acid Additions in Low Protein Layer Diets" (1977). South Dakota Poultry Field Day Proceedings and Research Reports, 1977. 6.