Effects of Different Levels of Green Tea and Resemary Extracts on Growth Performance, Carcass Characteristics, Liver Enzymes, Interleukin-6 and Interferon-Gamma Genes Expression in Broiler Chickens Ross 308

Abstract

Objective: This study was conducted to investigate the effects of green tea and rosemary extracts and their mixtures on growth performance, carcass characteristics, blood biochemical parameters, oxidative stability of meat and expression of interleukin-6 genes and interferon gamma in broiler chickens. Materials and methods Birds fed on a Corn-Soybean. The study was conducted in a completely randomized design with a 3 × 3 factorial arrangement with 9 treatments and 4 replications, each replication containing 15 birds. (540 Ross 308 broiler chickens). The experimental diets included the control diet (without extracts) and the levels of 0.5 and 1 g / kg extracts of green tea and rosemary. Results The results showed that the use of mixture of rosemary extracts increased feed intake, increased weight and improved feed conversion ratio at the end of broiler chickens breeding (P Conclusions In general, it can be stated that the mixture containing 0.5 rosemary extract (g/kg of feed) has the most effect on performance improvement, oxidative stability of meat and expression of liver genes in broiler chickens.

Keywords

• broiler
• gene expression
• green tea
• growth
• performance