Influence of Dietary Supplementation of Antibiotic and Probiotic on Rumen Fermentation in Crossbred Bullocks

Three rumen fistulated bullocks fed on three concentrate mixture i.e. T₁ (Control), T₂ (Antibiotic Kanamycin @ 20ppm/day) and T₃ (Probiotic: Biovet YC @ 7g/kg) were tested in a Latin Square Switch Over Design on in vivo rumen fermentation. There was no change in ruminal pH due to supplementation of Kanamycin, whereas pH was increased significantly (P < 0.05) in group T₃. The TVFA concentration increased significantly (P< 0.05) in groups T₂ and T₃ than in group T₄. Total-N and TCA-ppt-N concentration increased significantly (P<0.05) in groups T₂ and T₃ than in group T₁. Antibiotic and probiotic both altered rumen microbial population to improve fermentation efficiency.