Antibiotics widely used in poultry farms can have a harmful effect on meat consumers through chemical residues. Thus, it is important for the safety of customers to find a natural alternative. The purpose of this study was to evaluate the effectiveness of adding a poly-enzyme preparation “Universal”, containing amylosubtilin (1300 U/g), protosubtilin (67 U/g) and celloviridine (2000 U/g), on the productivity of broiler ducklings of the Cherry Valley breed. The results of research have shown that the addition of the “Universal” drug in the diet helped increase the meat productivity of broiler ducks. The use of the “Universal” drug contributed to the better development of internal organs (heart, liver and stomach) in broiler ducks. The improvement in duck weight and meat yield may be attributed to the fact that the feed protein is best consumed under the influence of protosubtilin, one of the “Universal.” It is understood that protosubtilin supplies digestible peptides and amino acids with hydrolysis of plant proteins from grain raw materials, enhances the gastrointestinal tract’s enzymatic history, compensates for the loss of depleted digestive enzymes and at the early stages of animal growth. Thus, the results of the experiment showed that the use of the drug “Universal” in the cultivation of broiler ducks of the cherry valley breed increases the pre-slaughter and slaughter weight, meat yield and reduces feed conversion, which is economically profitable. Therefore, it is recommended to use the drug “universal” as part of ration for broiler ducklings.

Modern technologies in poultry farming are aimed at preventing the death of poultry, which brings significant losses to producers. One of the possible ways to improve the physiological status of the bird’s body is the skillful selection of feed, which ultimately will allow for the maximum realization of genetically determined productivity. The purpose of the work was to provide a scientific and practical justification for the effectiveness of the use of an enzyme-probiotic complex in the rearing of ducks of the cross “Cherry Valley” of Beijing breed. The technology of production of meat of broiler ducklings is scientifically and economically justified when using an enzyme-probiotic complex based on the poly-enzyme drug “Universal” and the probiotic drug Actisaf as part of their compound feed. The optimal dose of the introduction of the probiotic Actisaf into the diet of poultry for its further use as part of a complex drug has been determined. It has been experimentally substantiated and proved that the use of the enzyme-probiotic complex in the feed of broiler ducklings makes it possible to increase the nutritional value and usefulness of their feeding, livability, energy and growth rate, normalize morphological and biochemical parameters of blood, the functional state of internal organs, positively affects the digestibility and use of feed nutrients. This allows us to get high-quality products and increase the profitability of its production. The economic efficiency was according to groups such as in the 1st experimental group (the optimal dose of drug Actisaf) it was 32 rubles, in the 2nd experimental group (the recommended dose of the poly-enzyme drug Universal) it was 11,6 rubles and in the 3rd experimental group (enzyme-probiotic complex) it was 56,3 rubles, including based on 1 rub of additional costs – 1,56 rub, 1,59 and 2,03 rub, respectively, for experimental groups. These developments are an important contribution to the problem of improving the theory and practice of fattening broiler ducklings under the conditions of the Republic of Tatarstan.

Учредитель и издатель: Founder and editor: ФГБОУ ВО «Казанская государственная академия ветеринарной медицины имени Н.Э. Баумана» (ФГБОУ ВО Казанская ГАВМ) FSBEI HE «Kazan Bauman State Academy of Veterinary Medicine»(FSBEI HE KSAVM) Печатается по решению редакционной коллегии Казанской государственной академии ветеринарной медицины им. Н.Э. Баумана от 5 Декабря 2019 г