Vol. 10, Special Issue 4, Part A (2025)

Author(s): K Selvarasu, P Veeramani, K Rajendran, S Senthilkumar, R Chitra and D Kannan

Abstract: biological experiment was conducted with 240 commercial (Vencobb), sexed, day-old broiler chicks to study the effect of dietary lysozyme supplementation as an alternative to antibiotics on the growth performance of commercial broiler chicken for a period of five weeks. These chicks were randomly grouped into six treatments with four replicates of ten chicks each and fed as per Vencobb standards with basal diet T₁ (Control), T₂ (Basal diet + antibiotic namely Bacitracin methylene disalicylate @ 1g per kg of feed), T₃ (Basal diet + 100 mg of lysozyme per kg of feed), T₄ (Basal diet +200 mg of lysozyme per kg of feed), T₅ (Basal diet + 300 mg of lysozyme per kg of feed) and T₆ (Basal diet + 400 mg of lysozyme per kg of feed). Supplementing lysozyme up to 300 mg per kg of feed (T₅) in the broiler diet significantly (p<0.05) enhanced body weight, while cumulative feed consumption and feed conversion ratio remained unaffected.