RESULTS OF ASSESSMENT OF THE EFFICIENCY OF FEED CONSUMPTION BY FARM POULTRY AGAINST THE BACKGROUND OF NATURAL PLANT SUBSTANCES

Background. In recent years, plant feed additives have received increasing attention as a natural alternative to antibiotic growth promoters in poultry production, which can be included in feed in dried, solid and ground form or as extracts. Among herbal supplements, there is growing interest in essential oils for use in nutrition as they have been shown to have much higher biological activity compared to the raw materials from which they were extracted. Cinnamaldehyde is the main component of essential oils (up to 90%) and cassia (up to 75%), which determines their smell. Materials and methods. Objects of study: Arbor Acres cross broiler chickens, cinnamaldehyde. For the experiment, 180 heads of 7-day-old broiler chickens were selected, which were divided into 4 groups using the analogue method (n = 45). Control group (C) received the basic diet (BR), experimental group I (CA-I) (RR + cinnamaldehyde 15 mg/kg feed/day), experimental group II (CA-II) (RR + cinnamaldehyde 30 mg/day kg of feed/day), III experimental group (CA-III) (OR + cinnamaldehyde 55 mg/kg of feed/day). Feeding of the experimental birds was carried out 2 times a day, and food intake was recorded daily. Birds were decapitated under nembutal ether on the 42nd day. Post-mortem anatomical cutting of carcasses 7 was carried out according to the VNITIP method. Hematological parameters (number and type of leukocytes) were taken into account using an automatic hematological analyzer URIT-2900 Vet Plus (URIT Medical Electronic Group Co., Ltd, China). Biochemical analysis of blood serum was performed on an automatic biochemical analyzer CS-T240 (Dirui Industrial Co., Ltd, China). Results. Broiler chickens from the CA-III group ate feed by 4.66%, 6.91 and 3.47% more relative to the control, CA-I and CA-II groups. On average, during the experimental period, broilers of the CA-II and CA-III groups had superiority over birds from the control group in terms of average daily live weight gain by 4.94 and 8.47%, and in absolute terms - by 4.93 and 7.98%. Broilers from experimental groups CA-II and CA-III were characterized by high pre-slaughter live weight, so in this indicator they exceeded group C by 4.50 and 7.27%. Conclusion. Inclusion of cinnamaldehyde in the diet of broiler chickens in an amount of 15-55 mg contributed to an increase in feed palatability and live weight, against the background of lower feed consumption per 1 kg of live weight gain and an increase in the antioxidant status of the body.