Authors:
O. G. LORETS, doctor of biological sciences, professor
O. V. GORELIK, doctor of agricultural sciences, professor,
N. V. BELYAEVA, the candidate of agricultural sciences, associate professor,
Ural State Agrarian University (42 K. Liebknechta Str., 620075, Ekaterinburg)
Abstract. In today’s world the technology of production becomes a decisive factor of the economic growth potential of all sectors of livestock production, best direction and object of capital and resources, the tool of competitive struggle. Technology determines the level of intensity and efficiency of production, environmental safety, product quality, biological and nutritional value of food. In recent years, for milk use of highly productive large horned livestock of black-motley breed with a high proportion of Holstein blood. For the manifestation of their genetic potential productivity need to work out the technology of cultivation of repair young growth, since it is known that growing conditions have a significant impact on the future productivity of the animals. With one year of age heifers up to 6 months of pregnancy the control group contained in the cell-group method on slatted cast-iron floors, and experimental – with loose-box technology. Different methods of content had an impact on their growth and development. Chicks of the experimental group in the first study period, from 12 to 15 months had a lower absolute increase that is due, in our opinion, with a stressful situation from the habituation of the animals to each other, since the number of animals in the group increased in two times. However, by 18 months of age the live weight of heifers in the experimental group reached a live weight of heifers of the control group at the same time they had higher average daily gain of 45.1 g (P < 0.05). Further, Chicks of the experimental group was superior to heifers in the control group. It was also found that loose-box way of content allows you to increase productivity and consequently the efficiency of milk production.
Keywords: heifers, growth, technology, production efficiency, milk and heifers.
