Abstract
To investigate the efficiency of savory essential oil on performance, organs relative weight, some blood parameters, immune response and hepatic enzymes of broiler chickens, a total 320 male Ross 308 chicks were allocated to four treatments and four replicates of twenty birds as a completely randomized design from. The varidifferent levels savory oil. The body weight gain (BWG), feed intake (FI) and feed conversion ratio (FCR) was recorded at continues weeks of the experiment. Relative weight of visceral organs was determined and blood serum glucose and activities of aspartate aminotransferase (AST), alanine aminotransferase (ALT), and alkaline phosphatase (ALP) were measured after blood sampling at 42 days old and plasma IgG immunoglobulin was quantified. Data showed that BW and FI increased with savory oil inclusion (p≤0.05). Besides, the savory oil decreased the plasma glucose, AST and ALT and serum blood Ig G of heat stressed broilers, increased significantly (p?0.05) instead. In conclusion we may suggested that, the savory oil at 0.4 ml/L could improve economic proficiency in broiler flocks due to accumulation of minute advantages in greater BWG, FI, and improved immune system and lowered hepatic enzymes under heat stress condition.
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