A fifty-six (56) day feeding trial was conducted to assess the response of broiler chickens to dietary supplementation of allicin. Three hundred (300) unsexed Cobb-500 day-old chicks were randomly assigned to five experimental treatment groups, using a completely randomized design (CRD) with three replications of 20 birds in each treatment. A basal diet was formulated for starter (0-21 days) and grower (22-56 days) periods. The five treatments were represented by T0 (the control, without any antibiotics or allicin), T1 (supplemented with antibiotics), whereas T2, T3 and T4, were supplemented with varying levels of allicin (25 % garlic oil) 0.10, 0.15, and 0.20 g/kg in the diet respectively. Feed and water were supplied ad libitum. Results of this study showed that the lowest inclusion level of allicin (0.10 g/kg) was better (p 0.05) different from the other treatment groups. Carcass parameters measured were poor (p>0.05) with the exception of live weight and liver weight which were statistically (p<0.05) significant. The significant (p<0.05) difference in the liver weight was recorded in the lowest level of inclusion of allicin (0.10 g/kg) whilst that of the live weight was observed between the control (T0) and T2 (at 0.10 g/kg inclusion level of allicin). Allicin supplementation at 0.10 g/kg had relative higher (p<0.05) carcass yield. In conclusion, the supplementation of allicin in the diets of broiler chickens may improve growth performance and carcass yield.
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Adjei et al. (2015) studied this question.
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