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The effect of pomegranate peel extract and probiotic on growth performance, blood parameters and gastrointestinal tract characteristics in broiler chickens under heat stress conditions

Document Type : Research Paper

Authors

1 Department of Animal Science, Razi University, Kermanshah, Iran

2 Department of Animal Science, Faculty of Agriculture and Natural Resources, Razi University, Kermanshah, Iran

Abstract

This experiment was conducted to evaluate the effect of pomegranate peel aqueous extract (PPE) and probiotic addition on growth performance, carcass and gastrointestinal tract characteristics and blood parameters of broiler chickens under heat stress conditions. A total of 420 one-day-old broiler chickens were distributed in a completely randomized design and as 3×2+1 factorial arrangement to seven treatments with six replicates and 10 birds per each replication. The experimental treatments consisted of two levels of probiotic (0, and 200 mg/kg), three levels of PPE (0, 500, and 1000 mg/kg) in addition of a positive control diet containing Tetracycline antibiotic. The chicks were exposed to 37 ± 1 °C for 7 h / d, 10:00 am to 17:00 pm, from 25 to 42 days of age. The main effects of PPE and probiotic were not significant on the body weight gain, feed intake and feed conversion ratio (FCR) during the starter (1-21 days of age) and whole experimental (1-42 days of age) periods. The dietary addition of probiotic and antibiotic numerically improved the feed conversion ratio during the starter phase as compared with control group (P < 0.10). The dietary addition of probiotic reduced the blood plasma cholesterol concentration (P < 0.05). Generally,, the addition of PPE and probiotic to the diet had no positive effect on weight gain, feed intake, production efficiency factor and carcass caracteristics of broilers reared under heat stress conditions, however the dietary addition of probiotic and antibiotic improved FCR by 10.3, and 9.1%, respectively, during starter period.

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References
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Research Journal of Livestock Science
Volume 38, Issue 146
June 2025
Pages 27-42
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