Vol. 9, Issue 8, Part G (2025)

A total of 250 commercial broiler chicks (Ven Cobb) have been used in current research to evaluate effect of varying levels of digestible valine (100, 75, 70, 65, 60% of the digestible lysine) on growth performance, carcass parameters, serum biochemical profile in commercial broiler diets in order to identify optimum level of valine required for maximum performance of commercial broilers without affecting carcass characteristics and health. The chicks were distributed to 5 treatments, each consisting of 10 replicates and having 5 chicks in each replicate in a completely randomized design (CRD). During the experiment, a corn-soybean meal based diet was prepared and supplemented with digestible valine at varying concentration in relation to digestible lysine. Throughout research duration, supplementing digestible valine at graded concentrations (75, 70, 65, 60% of digestible lysine) had no effect on feed intake, growth rate, FCR (feed conversion efficiency), carcass characteristics, namely breast yield, dressing percentage, abdominal fat weight (AFW). Serum biochemical substances (glucose, uric acid, HDL, LDL) were not significantly different among treatment groups. Serum triglycerides or VLDL (very low density lipoprotein) levels in commercial broilers have been significantly (p<0.05) influenced by differences in digestible valine concentrations. As compared to other treatment groups, valine supplementation at 75% digestible lysine indicated elevated VLDL concentration. This is finalized dietary digestible valine content of 0.826, 0.735, 0.665% (70% of digestible lysine) is sufficient at time of pre-starter, starter, finisher phases respectively, for optimizing performance of production in commercial broilers devoid of negative effect on carcass, serum biochemical profile.