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Adjusted Thr: Lys Ratio Improved the Performance and Efficiency of Japanese Quail

Lima, Matheus R. de; Costa, F. G. P; Guerra, R. R; Vieira, D. V. G; Cardoso, A. S; Fernandes, M. L; Macena, W. G; Nascimento, D. S; Rosendo, H. A; Silva, M. R. J; Oliveira, J. G. R; Santana, A. G. S.
Rev. bras. ciênc. avic; 25(1): eRBCA-2022-1653, 2023. tab, graf, ilus
Artigo em Inglês | VETINDEX | ID: biblio-1416166

Resumo

Two hundred and forty Japanese quail aged 125 days were randomly allocated to five treatment groups based on laying (%) and quail's weight (90.71 ± 1.8% egg/day × 100 and 178.05 ± 9.38 g, respectively), each of which included six replicates of eight quails. The diets were formulated based on corn, soybean meal, and industrial amino acids. An optimal diet achieves 100% of amino acids required by the quail requirements, except for threonine. Five treatments were made: 20% less amino acid; 10% less amino acid; optimal diet; 10% more amino acid; and 20% more amino acids than those in the optimal diet. The increase in amino acid levels in a fixed Lys: amino acid ratio led to histological alterations in the liver and uterine epithelium, reduction in blood lipid peroxidation, lower hepatic HSP70 gene expression, and the performance of laying Japanese quail. The optimal diet based on the NRC with an adjusted Thr: Lys 78 ratio (Lys 1.0%) improved the performance and efficiency of Japanese quail from 125 to 230 days of age.(AU)
Biblioteca responsável: BR68.1