valine, isoleucine, leucine, modeling, least-cost formulation
Renewed interest, especially in the United States, has sparked in assessing branched-chain amino acid interactions in practical diets for broilers. Indeed, as L-valine enters formulation bird nitrogen excesses are reduced as diet protein falls to the new first limiting amino acid (e.g., isoleucine, arginine, or tryptophan). For a United States based example, the result is less oilseeds and more gains, which typically result in increased inclusions in corn or corn by-products, coupled with a concomitant increase in dietary leucine. The proceedings outline the foundations of the branched-chain amino acid early research, antagonism studies, and a meta-analysis conducted on publications with Cobb and Ross birds from 2000 to present. Results indicate that branched-chain amino acid interactions can occur in broilers fed on practical diets, and that responses vary by strain.
Maynard, Craig W.; Gbur, Ed E.; Ly, Vinh-Loi; Le, Minh-Duc; Ngan Le, Thi H. Jr; Caldas, Justina; and Kidd, Michael T.
"Assessing Dietary Branched-Chain Amino Acids to Achieve Linear Programming Goals through Model Extrapolation and Empirical Research,"
Proceedings of the Arkansas Nutrition Conference: Vol. 2021, Article 10.
Available at: https://scholarworks.uark.edu/panc/vol2021/iss1/10