Evaluation of growth performance, carcass and organ weights of broiler finisher birds administered aqueous extracts of Garcinia kola seeds
A total of one hundred and thirty five broiler finisher birds were used in this study which lasted for 28 days. The birds were randomly assigned to three experimental treatments; T1 , T2 and T3 , containing 0.0, 15.0 and 30.0 g/L of ground Garcinia kola seeds, respectively. Growth performance of the broiler finisher birds recorded significantly (P<0.05) higher final body weight in treated birds than control birds. Similar significant (P<0.05) trend was observed in total weight and daily weight gains. Feed conversion ratio was significantly (P<0.05) lower in treated birds than control birds. Carcass parameters and internal organ weights of the birds recorded significantly (P<0.05) higher carcass yield in T2 (89.39 %) and T3 (89.68 %) than in T1 (85.53 %). Percentage breast weight of the birds significantly (P<0.05) increased in a dose dependent manner in the experimental birds (T1 = 18.30 %; T2 = 20.22 %; T3 = 35.12 %). Percent thighs weight was significantly (P<0.05) higher in T2 (30.97 %) than in T1 (18.59 %) and T3 (18.47 %), which were similar (P>0.05). Internal organs evaluation only 3 recorded significantly (P<0.05) higher percent weight in the gizzards of the birds on T1 (2.00 1 %) and T2 (1.90 %) than the birds on T3 (1.41 %). The results of this study shows that, besides enhanced growth in broiler finisher birds, aqueous extracts of Garcinia kola seeds can be used to alter the normal allometric or differential growth pattern in broiler finisher birds to stimulate significant weight increase in the breast and thigh muscles.
Keywords: broiler finisher, growth, carcass and organs weights, Garcinia kola seed extracts