Influence of dietary lycopene on growth performance, antioxidant status, blood parameters and mortality in broiler chicken with cold-induced ascites
Mokhtar Fathi1, Taimour Tanha1, Shahriar Saeedyan2, Mohamad Ghoreyshi3
1Payame Noor University, Dept. of Agriculture, Iran
The aim of this study was to determine the effecs of dietary lycopene supplementation on growth performance, antioxidant status in broiler chickens exposed to cold-induced ascites. Three hundred male chicks were exposed for 24 h to cold stress (10◦C) starting from 15d of age, while a positive control group (NT, 100 birds) was kept under normal temperature condition. The experimental groups under cold stress (Three treatments in 5 replicates of 20 birds) were: negative control (CT, basal diet), basal diet + 200 and 400 mg/kg lycopene from 15 to 42 days of age. Results showed that Cold stress caused reductions in feed intake and weight gain and increased feed efficiency by Increasing dietary lycopene levels were restored performance and lowered RV/TV index and ascites mortality in CT environments. Birds reared under the CT environment had lower serum activities of superoxide dismutase, glutathione peroxidase and higher malondialdehyde (MDA) concentration than birds reared under the NT environment. With increasing lycopene level, serum MDA level significantly decreased and the activity level of superoxide dismutase (SOD), glutathione peroxidase (GPx) enzymes increased. Blood hematocrit, hemoglobin and RBC concentration were decreased to the level comparable to CT by lycopene supplementation. Moreover, increasing dietary lycopene level suppressed serum concentrations of cholesterol and enhanced HDL comparable to CT. In conclusion, lycopene supplementation alleviates adverse effects of cold stress on performance through modulating activity of antioxidant enzymes in broiler chickens.
Keywords: Anti-oxidant status, ascite, broiler, cold stress, lycopene
Contact Address: Taimour Tanha, Payame Noor University, Dept. of Agriculture, The West of Shaid Bagheri, Tehran, Iran, e-mail: tanha1351yahoo.com