The effectiveness of the use of quercetin on the biochemical parameters of the carcass of Arbor Acres broiler chickens

The purpose of the study was to evaluate the effect of quercetin on the biochemical composition of the carcass of broiler chickens. Methods. The studies were carried out on 100 heads of 7-day-old broiler chickens (cross Arbor Acres, 4 groups, n = 25). Experimental scheme: control group – basic diet (RR); I experienced (OR + quercetin at a dose of 5 mg/kg feed/day); II experimental (OR + quercetin at a dose of 10 mg/kg feed/day); III experimental (OR + quercetin at a dose of 15 mg/kg feed/day). The scientific novelty lies in the fact that for the first time the influence of the use of small molecules of plant origin: quercetin dihydrate on the biochemical composition of muscle tissue and liver of broiler chickens was studied. Results. It was established that the amino acid composition of the muscle tissue of the experimental bird was distinguished by a higher content of: lysine, phenylalanine, leucine-isoleucine, methionine, proline, alanine and glycine in groups I and III (pectoral muscles), as well as a high content of histidine, proline in group III (thigh muscles). In the liver of the experimental groups, an increase in the content of: lysine, tyrosine, phenylalanine, histidine, leucine-isoleucine, valine, proline, alanine and glycine was found. An increase in the concentration of fatty acids in the pectoral muscles was also found: palmitoleic (group III), stearic and linolenic (group II), arachidonic (groups I and III), in the femoral muscles: linolenic (groups I and II), with a decrease in palmitic, palmitoleic (I group) and arachidonic (I–III groups). In the liver tissue, a decrease in the content of palmitoleic (groups I–III), oleic (group III), and an increase in palmitic (group III), linolenic (groups I–III) was recorded. The introduction of the tested herbal preparation into the diet had an ambiguous effect on the mineral profile of the muscles and liver of experimental chickens, which manifested itself in the form of an increase in the level of individual elements with a significant decrease in others.