Crude enzymes supplementation in fibrous diet improves performance of commercial broilers

A total of 280, 1-day-old mixed sex broiler chicks were randomly allotted to seven dietary treatment groups. Basal diet was formulated with high fibrous contents (6.72%). Increasing levels of cell-free fermentation broth containing cellulases were mixed in basal diet of groups B, C, D and E (equivalent to 1.2×10⁴ IU, 2.4×10⁴ IU, 3.6×10⁴ IU and 4.8×10⁴ IU cellulases/kg, respectively). Where as in diet of group F, fermentation broth containing 3×10⁴ IU protease and 1.2×10⁴ IU cellulases were added per kilogram. In diet of group G fermentation broth containing 3×10⁴ IU protease and 2.4×10⁴ IU cellulases were added per kilogram. Significant improvement (P