Michael Gholipour; Vahid Vahedi; Zarbakht Ansari Pirsarei
Volume 22, Issue 3 , September 2020, , Pages 431-440
Abstract
This study was conducted to determine the effects of Propolis on growth performance, carcass characteristics and some blood parameters in broiler chickens in response to heat stress condition. A total of 160 one day-old male broiler chicks (Ross 308) were randomly divided into four treatment groups in ...
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This study was conducted to determine the effects of Propolis on growth performance, carcass characteristics and some blood parameters in broiler chickens in response to heat stress condition. A total of 160 one day-old male broiler chicks (Ross 308) were randomly divided into four treatment groups in a completely randomized design with four replicates of 10 birds each. The experimental treatments including: 1) control (basal diet), 2) the basal diet with Neomycin (200 g/ton), 3) 150 mg/kg Propolis, 4) 200 mg/kg Propolis in diet. Birds submitted to heat stress (32±2ºC from 10.00 AM to 6.00 PM) from 15 to 42 d of age. The results showed that, average mortality was lower in Propolis groups than in the control group (p < 0.05). None of the feed intake data was influenced by treatments during different periods. Birds receiving diet supplemented with 200 mg/kg Propolis had a significantly (p < 0.05) higher body weight compared to the control group at the finisher feeding phase and whole period. In the finisher phase and whole period, the lowest (p < 0.05) fed conversion ratio (FCR) was observed in chickens fed 200 mg/kg Propolis. Cholesterol and LDL level were lower in chickens fed diet with Propolis compared to control (p < 0.05). In conclusion, the addition of Propolis at a rate of 200 mg/kg to the diet could reduce the negative effects of heat stress in broiler chickens.
abbas ashoori; Alireza Behnamifar
Volume 19, Issue 3 , November 2017, , Pages 685-696
Abstract
The effects of the herbal extracts (Rosemary officinalis L., Salvia officinalis), propolis, virginiamycin antibiotic and the herbal coccidiostat were studied on broiler chickens challenged with two E. coli strains (O78K80 & O2K12). A total of 476 female cobb 500 broilers was allocated in a completely ...
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The effects of the herbal extracts (Rosemary officinalis L., Salvia officinalis), propolis, virginiamycin antibiotic and the herbal coccidiostat were studied on broiler chickens challenged with two E. coli strains (O78K80 & O2K12). A total of 476 female cobb 500 broilers was allocated in a completely randomized design considering seven treatments with four replicates and 17 birds per each for 42 days. Negative and positive control groups received a basal diet with no supplementation. The two herbal groups received a basal diet with 1 mL of ethanol herbal extracts (Rosemarinus officinalis & Salvia officinalis) / L drinking water, respectively. The virginiamycin (10%), the herbal coccidiostat and the ethanol extract of propolis groups fed the basal diet plus 150, 200 and 500 mg / kg diet, respectively. All groups except negative control challenged with two E. coli strains (O78K80 & O2K12) in 14d of rearing period. Herbal extract decreased the intestinal population of E. coli and Salmonella compared to the positive control (P<0.05). In the rearing period, feed conversion ratio and feed intake in chickens received herbal extracts and herbal coccidiostat were significantly lower than control groups (P<0.05). Birds that received rosemary and propolis had the lowest relative weight of the breast compared to other treatments (P<0.05).Herbal extracts decreased the cholesterol and increased HDL levels of serum (P<0.05). It could be concluded that the herbal extracts can be used as an alternative to antibiotics as growth promoters in broiler chicks.