Carcass Yield and Histo-Anatomical Changes in Broilers Fed on Diet Supplemented with Different Levels of Phytobiotics

The present study investigates the comparative effectiveness of different concentrations of garlic (Allium sativum) and ginger (Zingiber officinale) on carcass yield and selected histo-anatomical parameters of broilers. A total of 80 one day-old chicks were divided into five different groups with each group having 4 replicates in a trial of 35 days. The first group was kept as control whereas, the second, third, fourth and fifth groups diet were supplemented with garlic at 0.25 and 0.5% and ginger at 0.25 and 0.5% respectively in the diet. At the end of trial all birds were slaughtered for analysis. Results revealed that carcass weight and carcass yields were significantly (P<0.05) improved by garlic supplementation at 0.5% compared to other groups. Histo-anatomy revealed that the strength of tibia bone increased significantly (P<0.05) whereas, the number of intraepithelial lymphocytes decreased significantly (P<0.05) by the dietary supplementation of garlic and ginger irrespective of level. It is concluded that 0.5% garlic can be used as a potential replacement for antibiotic growth promoters in the broiler diet.