Authors:
O. S. CHECHENIKHINA, candidate of agricultural sciences, associate professor,
A. V. STEPANOV, candidate of agricultural sciences, associate professor,
Ural State Agrarian University (42 K. Libknehta str., 620075, Ekaterinburg; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.).
Abstract. The studies are devoted to the study of a combination of high values of the conventional value of the udder’s udder and the intensity of milk yield as an indicator of good animal health, fitness for machine milking and high milk productivity. The optimal parameters for the selection of black-and-motley cows suitable for the use of a robotic milking system are established. The work was carried out in JSC «Sovkhoz Chervyshevsky» of the Tyumen region. Morphological (conditional value, cm2) and functional (milk yield, kg / min) parameters of the udder cows’ udder edema in the second month of expansion were assessed, and milk productivity was monitored for 305 days of the first lactation. Based on the research, a new method for selecting high-yielding black-and-motley cows with intensive milk production technology has been developed. It is an object of the present invention to reduce the duration, laboriousness and efficiency of selecting highly productive cows in the breeding core, combining a well developed udder with a high milk yield. The problem is solved by the fact that a group of animals with a conventional udder size (udder circumference × the average udder depth) of at least 3000.0 cm2 is selected annually in the herd of first-calves in the second month of ration. From this group, animals are selected for which the indicator of the intensity of milk yield in the second month of the first lactation ration exceeds the average group index by one sigma (x +1σ) , where x is the average value of the characteristic; σ is the standard deviation. This method of selecting cows will allow to increase the yield for 305 days of the first lactation by 540.7 kg, lifetime animal yield of 1696.3 kg and the period of production use by 0.6 lactation, which undoubtedly entails an increase in the efficiency of using high-performance milking equipment. When using this development, it becomes possible to quickly and accurately predict the future productivity of cows in the second month of the first lactation and form a breeding core without involving expensive blood and other body fluids.
Keywords: black-and-motley breed, robotic milking, udder size, milk yield intensity, new selection method.
