Effect of Garcinia kola (bitter kola) on growth performance and meat quality of broiler chickens
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Abstract
The effect of Garciniakola on the performance and meat quality of broiler chickens was investigated. A total of one hundred and eighty unsexed day-old Anak broiler chicks were randomly assigned to five treatments containing thirty-six chicks each. Each treatment was
replicated three times, containing 12 birds each. Adopting the completely randomized experimental design (CRD), five diets were formulated for starter and finisher phases. Treatment one (T1) was the control diet while T2, T3, T4 and T5 contained 0.5, 1.0, 1.5 and 2.0% G. kola respectively. Feed and water were provided ad libitum to the birds. Proximate analysis showed that G. kola contained crude protein (2.29%), nitrogen-free extract (65.70%), ash (13.97%), crude fiber (9.32%) and energy (280.43 kcal/g). Phytochemical result showed that G.kola contained oxalate (6.57 mg/100 g), tannin (17.55mg/100g), phenols (116.02 mg/100), an alkaloid (2.61 g/100 g), saponin (1.96 g/100 g) and flavonoid (7.56 g/100 g). At the starter phase, G. kola reduced the weight gain and feed intake of the broilers but did not affect the feed: gain ratio. In the finisher phase, G. kola inclusion above 0.5% reduced final live body weight (P<0.05). However, in both phases, there were no significant (P>0.05) differences in daily gain, feed intake andfeed conversion ratio. General acceptability, colour, flavour, tenderness and juiciness of the meat were found to be best at a 0.5% level of inclusion. Therefore, G. kola, is not recommended during the starter phase as it affects feed intake and weight gain. It can be fed to finisher birds
but not beyond 0.5% level of inclusion.
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