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

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