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The use of industrial technologies in modern enterprises, based on the comprehensive modernization of most production processes, leads to an increase in the impact of a number of negative factors and their quantity. This contributes to the stress in animals. The purpose of this research is to assess the stress resistance of cows of various origins, as a factor affecting the suitability of animals for robotic milking. These studies were conducted on the basis of the “Sovkhoz Chervishevsky” in the Tyumen region. Hematological and clinical-physiological parameters of the studied cattle groups showed that all animals are clinically healthy. Cows with loose housing and robotic milkers were more often stressed – the amount of cortisol and adrenocorticotropic hormones is much higher in the blood of these animals, compared to the other group of animals (stanchion-tied, milking pipelines), on average by 4.19 nmol/l (11.3%) and 5.27 pg/ml (5.8%), respectively. At the same time, the largest percentage of cows with a high type of stress resistance is 50.8% of all cows of the other group. Simmental cattle have higher levels of cortisol and ACTH, compared to Russian Black Pied cattle. The difference in this case was 2.14 nmol/l (5.6%) and 1.18 pg/ml (1.3%), respectively. Russian Black Pied cattle was the leader in the milk yield for a 305 days of lactation period, they were on the loose housing system with robotic milking and made a yield of an average 430.5 (8.1%) (p <0.001). The superiority of Russian Black Pied cattle over the Simmentals was established – by 6.0 kg of milk yield (0.1%). Consequently, the use of a robotic milking system for cattle makes it possible to obtain higher milk yield during the lactation period with a fairly stable indicator of the mass fraction of fat and protein in milk. At the same time, animals of Russian Black Pied cattle turned out to be more stress-resistant in this case as compared with cows of the combined Simmental breed. Keywords—types of cattle stress resistance, robotic milking, cortisol, prolactin, adrenocorticotropic hormone, milk productivity.

Stress resistance as a factor in the suitability of cattle for robotic milking