Addition of Quercus cortex extract to broiler diet changes slaughter indicators and biochemical composition of muscletissue

Following world trends in feeding farm animals, it should be noted an increasing interest in polyphenolic substances derived from plant extracts. Recent studies indicate the ability of these substances to stimulate growth of animals and poultry, to reduce the risk of diseases and to improve consumer properties of products. This paper is the first our report to show that dietary Quercus cortex extract, when used separately or in combination with amylolytic and cellulolytic enzymes, promotes slaughter indices of Smena 8 cross broilers and can change meat composition on fatty acids and some microelements. For the experiment, 7-day chicken broilers were divided by analogs' method into 4 groups ( n = 30, a total of 120 birds). Control group received main diet, Quercus cortex extract was added to the diets of groups I and II (2.5 ml/kg LW), group II and group III were also fed with an enzymatic preparation containing glucoamylase and concomitant cellulolytic enzymes (5 g/10 kg of feed)...