Authors:
A. A. BELOOKOV, doctor of agricultural sciences, professor,
O. V. BELOOKOVA, candidate of agricultural sciences, assistant of department,
O. G. LORETZ, doctor of biological sciences, professor,
O. V. GORELIK, doctor of biological sciences, professor,
South Ural State Agricultural University (13 Gagarina str., 457100, Troitsk, Chelyabinsk region),
Ural State Agrarian University (42 K. Liebknehta str., 620075, Ekaterinburg).
Abstract. Use in the feeding of young cattle of microbiological preparations promotes gas exchange in the lungs and tissues, increasing the activity of antioxidant system. As a consequence of increased productivity, slaughter yield and quality of meat of young animals. Up to 18 months of age of the calves of the experimental groups grew more rapidly than animals of the control group. At the age of 3 months calves 2nd experimental group was significantly superior to counterparts from the control group by 5.8 kg (6.7 %), the percentage influence of the drug to be 12.4 %. At the age of 9 months the difference between these groups was 21.2 kg (10.8 %) (P < 0.001), the percentage influence of the drug versus 32.8 %. To the end of the experiment the difference was 28.6 kg or 7.3 % (P < 0.01), the percentage influence of the drug to 10.7 %. Pre-slaughter weight after 24 hours hungry extracts had the highest in the 2nd experimental group – 357.3 kg, more than peers in the control group, 30.6 kg (9.4 %) (P < 0.05). Therefore, was higher in the experimental groups and the mass of steam carcass: 1st group – 168.5 kg, 2nd – 180.5 kg, the difference with the calves of the control group were, respectively, 5.2 and 12.7 %. Starting from 6 months. age an increase in blood of bull-calves of hemoglobin and red blood cells. The level of hemoglobin increased in comparison with 3 months age in 1st group 10.8 % in the 2nd – 12.6 %, control – 5.3 %. The difference in hemoglobin level between experimental and control groups were respectively of 6.9 and 8.1 % (P < 0.05). Thus, the use in the feeding of steers of microbiological preparations can improve their productivity, carcass yield and qualitative composition of meat.
Keywords: meat productivity, growth and development, EM-preparation, meat quality, cattle the morphological composition of the blood.
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