Effects of star anise (Illicium verum Hook.f.), essential oil, and leavings on growth performance, serum, and liver antioxidant status of broiler chickens
2017
Ding, X. | Yang, C.W. | Yang, Z.B.
An experiment using 384 one-day-old male Arbor Acres broilers that were randomly allocated to 4 treatments with 8 replicates in a completely randomized design was conducted to assess the effects of star anise (Illicium verum Hook.f.), essential oil, and leavings on growth performance and antioxidant status of broiler chickens. The treatments were corn-soybean meal based diets supplemented with 5 g/kg star anise, 0.2 g/kg essential oil, and 5 g/kg leavings of the diets for 42 days. All broilers had similar feed conversions over the entire experimental period. However, broilers supplemented with star anise and its essential oil had higher (P < 0.05) ADG and ADFI than those of the control and leavings. Supplementation of star anise and its essential oil increased (P < 0.05) activities of super dismutase, glutathione peroxidase, and catalase but decreased (P < 0.05) content of malondialdehyde in the serum of broilers at 21 d and 42 d of age. And it also increased (P < 0.05) activities of super dismutase and catalase but decreased (P < 0.05) concentrations of malondialdehyde in the liver of broilers at the same periods. Dietary supplementation of star anise and its essential oil improved growth performance and serum and liver antioxidant status. The efficacy is best at 5 g/kg star anise or 0.2 g/kg essential oil in the diet.
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