الفهرس 
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Abstract
This work was carried out to study the effects of dietary TSAA level and copper supplementation on the growth performance, carcass traits, tibia bone characteristics and some blood parameters of Japanese quail chicks during the growing period of (1-6 weeks of age). A 3x3 factorial design was performed including three levels of total sulpher amino acids (0.75, 0.85 and 0.95%) and three levels of copper supplementation (0, 100 and 200 mg/kg diet) through 1-6 weeks of age. Results obtained indicated, significant improvement in LBW at 6 weeks of age, BWG and FCR through 3-6 and 1-6 weeks of age in the group fed diet containing 0.95% TSAA, comparing with those receiving 0.75% or 0.85%. Addition of copper to the diets at levels of 100 and 200 mg/kg diet significantly improved all traits of growth performance comparatively with those un-supplemented diets during 1-6 weeks of age. Results showed that, TSAA level and copper supplementation had no significant effects on all carcass traits studied except only gizzard %.TP, Alb, Glb and glucose concentration significantly increased with the level of 0.95 and 0.85 % TSAA while, blood glucose had significantly increased with the level of 100 and 200 ppm of copper.The activity of both AST and ALT significantly decreased at the level of 0.95% TSAA than the other levels, also significant variations between control and other treatment in the ALP activity were recorded. The supplementation of Cu at 200 mg/kg and the dietary TSAA at level 0.95 % seemed to be the optimum levels.