The article presents the results of the usage efficiency of broilers of non-conventional raw materials of vegetable dry beet pulp, which has a positive impact on the physiological characteristics of poultry and quality indicators of meat. The research was carried out at the premises of the educational and scientific poultry farm of Belgorod State Agricultural University. For the experiment, 140 daily chickens were selected and four groups (peer groups) were formed: one control group and 3 experimental groups of 35 heads each. Duration of the scientific and economic experiment -41 days. The control group received the basic diet (BD). Chickens of all the experimental groups received the basic diet from 1 to 20 days. In 21-41 days, chickens of the 1st experimental group were fed 98% BD and 2% of the dry pulp, 2nd group -96% BD and 4% of dry pulp, while 3d experimental group -95% BD and 5% of dry pulp. As a result of the research, it was found that the use of dry beet pulp (replacement of 4% BD) in the diets of broiler chickens has a positive impact on their productivity and the quality of meat products. When it is included in the diet, the feed costs per unit of output are reduced. By replacing the basic diet with dry pulp, the authors significantly reduce the cost of feed, which leads to an increase in profitability by 4.7%.

One of the methods of combating unwanted microflora is the use of antibiotics, however, along with positive properties, they have a number of significant disadvantages, in particular, the detrimental effect of both pathogenic and beneficial intestinal microflora. In this regard, there is an urgent need to replace antibiotics with safer substances, which increasingly include probiotics. The mechanism of action of probiotics is to selectively affect pathogenic microflora, without harming the beneficial one. In the course of the study, it was found that low-protein diets (low in protein, but balanced in amino acid profile) allow unlocking the potential of probiotic cultures of the Bacillus amyloliquefaciens strain and, as a result, reduce feed conversion by 0.08 kg/kg.