Document Type : Research Paper

Authors

1 Jiroft University

2 Shiraz University

Abstract

This study was conducted to investigate the effects of different levels of borage (Echium amoenum) powder on performance,nutrient digestibility and some blood parameters in heat stressed broiler chickens. A total of 160, one-day-old male broiler chicken (Ross 308) were randomly allocated to 4 treatments with 4 replicates, 10 chicks each, in a completely randomized design. The dietary treatments consisted of: T1, basal diet (BD), T2, T3 and T4 were included BD plus 500, 1000 and 2000 mg/kgBW boragepowder, respectively. The birds reared at the same condition till 24-day of age. The birds were kept at 34°C±2 (9.00am to 17.00; for 8 hours) from 25 to 42 days of age. Dietary supplementation of 1000 mg/kg body weight (BW) ofborage powder increased body weight gain and significantly improved FCR compared to that of basal diet (P<0.05). Inclusion of 1000 mg/kg BW borage powder significantly (P<0.05) increased protein digestibility. Addition of 500 or 2000 mg/kgBW borage powder significantly increased lipid digestibility (P<0.05). Supplementation of diet with 1000 mg/kgBW borage powder significantly reduced (P<0.05) heterophile to lymphocyte ratio and increased glutathione peroxidase activity (P<0.05). Inclusion of 1000 mg/kgBW borage powder significantly (P<0.05) reduced relative weight of bursa fabricious and pancreas in broiler chickens. It was concluded that supplementation of diet with 1000 mg/kgBW borage powder improved performance, protein and lipid digestibility and decrease negative impact of heat stress in broiler chickens.

Keywords

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