The research was carried out at an enterprise in the Sverdlovsk region. Two groups of black-motley cows were formed: the first including cows of free stall housing with a robotic milking system; the second having tied cows that were milked into the milk pipeline. It was found that udder measurements of animals of the first group had greater values than those of the second group.

Scientific and production experience has been carried out to study the value of the herbs of alpine meadows, where livestock are fed and achieve good results. It is advisable to use natural mountain and pre-mountain pastures for feeding livestock if they begin to be grassed after growing 15-17 cm According to the results of our research, concentrated feeds are also most efficiently used as feeding at the final stage of the burning, that is, during the preparation of livestock for sale for meat.

In mycological studies of grain samples from agricultural enterprises of the Ryazan region microscopic fungi of the genera Aspergillus and Fusarium were identified. To confirm grain viability, grain contamination with mycotoxins and fungi, and to differentiate the sown grain from the feed grain luminescent diagnostics was used. The method of immuno-enzyme analysis revealed the following mycotoxins: zearalenone, T-2 toxin, deoxynivalenol. The excess of the maximum permissible concentration of deoxynivalenol was found.

Polymorphism has been studied and occurrence frequency of genotypes and alleles by genes of kappa-casein and diacylglycerol O-acyltransferase in first-calf heifers and highly productive black-and-white cows of different genealogical lines has been determined. The highest frequency of CSN3 AB genotype (34.7% and 38.9%) and CSN3 BB genotype (10.2 and 5.6%) has been registered in the first-calf heifers of M. Chiftein and R. Sowering line at the B allele frequency of CSN3 gene – 0.28 and 0.25.