Influence of voluntary milking technology on productivity indicators of cows of different types of stress resistance

The article considers the factors that can lead to animal stress and result in both productivity decrease and development of various diseases, up to the death of the animal. In order to avoid negatively affecting factors it is necessary to properly organize work in farms, especially in high-productive farms. The aim of the work was to study milk productivity of cows with different types of stress resistance. It was found that the number of animals with different types of stress resistance depends on the principles of milking machines used in the farm, which have a number of differences in udder preparation for milking, in putting on milking cups and other. So, «Lely» milking machine works «idle» only in the group with average type of stress resistance (0.3 times). And «DeLaval» machine works «idle» in all groups of animals (from 0.5 to 0.7 times). Using the robot without milking cows depends more on the type of milking machine than on the level of animals’ stress resistance, determined by the degree of the milking reflex inhibition.