Increasing Resistance and Productivity of Broiler Chickens through Probiotics

A series of experiments were conducted at the poultry farm "Sary-Bulak" in the Almaty region in 2023. The objective was to determine the effect of a probiotic supplement, developed based on the connection of strains of lactic acid bacteria, on live weight, average daily gain, livestock safety, feed costs per unit of live weight gain, meat quality of carcasses and economic efficiency in growing young meat poultry. A total of five groups were formed, comprising one control group and four experimental groups, with each group comprising 100 heads. The chickens in the experimental groups were fed a mixed fodder diet with different dosages of probiotic supplement, with group 1 serving as a control. All technological parameters pertaining to the growth of meat chickens were in accordance with the recommendations for the utilization of probiotic supplements in poultry farming. The research demonstrated that the utilization of varying doses of probiotic supplements in mixed fodders resulted in an increase in the final live weight of broiler chickens by 4.7-12.8% in comparison to the standard diet. The optimal dose for young meat chickens was 0.15 mL/kg in the first week and 0.45 mL/kg throughout. This resulted in a 13.1% increase in daily weight gain and a 6.6% improvement in livestock safety. Furthermore, the additive enhanced the nutritional value of the meat, with selenium and iodine levels rising by 6.8 and 2.3 times, respectively. The results of the economic analysis indicated that the experimental group exhibited a 1.5-fold increase in profitability. It is therefore recommended that 0.45 mL/kg of probiotic supplement be incorporated into mixed fodder in order to enhance meat productivity and quality.