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    The effects of propolis and vitamin C supplemented feed on performance, nutrient utilization and carcass characteristics in broilers exposed to lead
    (Elsevier Science Bv, 2012) Seven, Ismail; Aksu, Taylan; Seven, Pinar Tatli
    The present study was conducted to determine the effects of vitamin C and propolis supplemented diets on nutrient utilization, carcass characteristics and performance in broilers exposed to oxidative stress by lead administration. 360 three-days-old broiler chicks (Ross 308) were randomly divided into four treatment groups each containing 90 animals, including six replicate groups for each treatment. The experimental groups were designed for a 3-42 days period as follows: no supplement to basal ration (Control; group I); supplement of 500 ppm vitamin C and 200 ppm lead (as lead acetate) to basal ration (Vitamin C+Pb; group II); supplement of 1 g/kg propolis and 200 ppm lead (as lead acetate) to basal ration (Propolis + Pb; group III); and supplement of 200 ppm lead (as lead acetate) to basal ration (Pb; group IV). Feed intake was reduced with lead inclusion in the diet (P < 0.05). The presence of lead in the diet reduced the body weight gain (BWG) but vitamin C or propolis supplementation improved the BWG in comparison to lead administered group at 3-42 days (P < 0.01). Feed conversion ratio of control, vitamin C+lead, and propolis+lead groups improved (P < 0.05) in comparison to lead administrated group from 29 to 35 days. Utilization of crude protein improved with both vitamin C and propolis supplementation in comparison to the lead administrated group (P < 0.05). Hot and cold carcass, leg and breast yields were higher (P < 0.05) for the control than for the lead added groups (P < 0.05). Except to breast yield, other carcass characteristics in the control group were similar with those of the vitamin C or propolis supplemented groups. The results suggested that lead inclusion in diet of birds had negative effects on the performance while propolis supplements improved the growth, nutrient utilization and carcass yield. (C) 2012 Elsevier B.V. All rights reserved.
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    The Effects of Propolis on Biochemical Parameters and Activity of Antioxidant Enzymes in Broilers Exposed to Lead-Induced Oxidative Stress
    (Asian-Australasian Assoc Animal Production Soc, 2010) Seven, Ismail; Aksu, Taylan; Seven, Pinar Tatli
    This study aimed to determine the effects of vitamin C and propolis-supplemented feeds on some blood parameters, lipid peroxidation, and activities of some antioxidant enzymes in broilers exposed to oxidative stress. 360 three-day-old broiler chicks (Ross 308) were randomly divided into four treatment groups each containing 90 animals, including six replicate groups for each treatment. The experimental groups were designated for a 3-42 days period as follows: no supplement to basal ration (Control-Group I); supplement of 500 ppm vitamin C and 200 ppm lead (as lead acetate) to basal ration (Group II); supplement of 1 g/kg propolis and 200 ppm lead (as lead acetate) to basal ration (Group III); and supplement of 200 ppm lead (as lead acetate) to basal ration (Group IV). The highest TG level (86.83 mg/dl) was observed in the lead supplemented group; however, the lowest aspartate aminotransferase (SGOT) level (90.71 IU/L) was observed in the control group (p < 0.05). The addition of lead increased the plasma malondialdehyde (MDA) level (p < 0.01) compared to other treatments. However, the addition of vitamin C and propolis decreased the plasma MDA level close to control levels. The highest erythrocyte superoxide dismutase (SOD) activity was observed in the lead addition group (p < 0.01) while no significant differences were observed for SOD activities of the control, vitamin C +lead, and propolis+lead groups. The plasma reduced glutathione (GSH) activity of the control (2.30 mu mol/m1) was significantly lower than the lead administered group (6.20 mu mol/ml) (p < 0.01); while this parameter was determined to be similar to other groups. No significant differences were observed between groups for liver GSH activity, but heart GSH activity of the control was significantly higher in comparison to other treatments (p < 0.05). To obtain similar antioxidant effects, it is recommend that using propolis (1 g/kg) and vitamin C (500 mg/kg) supplementation in broiler diets may overcome the adverse effects of oxidative stress originating from dietary lead.