Effect of Supplementation of Synthetic Lysine and Methionine on Serum Biochemical Profile, Carcass Characteristics and Meat Composition in Broiler Chicken

A total of 144 day old broiler chicks of Vencobb strain 400 randomly distributed into four groups (3 replicates of 12 chicks) using randomized block design viz. T₀-basal diet (control), T₁, T₂ and T₃ were offered the basal diet supplemented with synthetic L-lysine at 20, 30 and 40% and DL-methionine at 30, 40 and 50% in excess of the total BIS (2007) recommendations upto 42 days of age. Non-significant effect of supplementation of synthetic lysine and methionine were observed on feed intake. However, total gain in body weight and FCR were significantly (P<0.01) influenced by supplementation. Significant increase (P<0.001) in serum total protein was observed in the birds of T₂ group whereas serum cholesterol and triglyceride level decreased (P<0.01) with increased level of synthetic amino acids. Statistically non-significant effect of supplementation was observed on dressing percentage, yield of prime cuts, percent weight of visceral organs and chemical composition of meat except that the abdominal fat pad was lower in groups T₂ and T₃. The study revealed that supplementation of 30% synthetic L-lysine and 40% DL-methionine higher than BIS (2007) recommendation in broiler rations reduced serum cholesterol and triglyceride levels.