Формирование мясной продуктивности и синтез белка, жира в тканях тела бычков при повышенном уровне энергии в рационе
2010
Tsaj, V.P. | Lemeshevskij, V.O. | Shevtsov, A.N. | Gurina, D.V., National Academy of Sciences. Scientific and Practical Center of Animal Breeding (Belarus) | Zhalnerovskaya, A.V., Vitebsk State Academy of Veterinary Medicine (Belarus)
In the conditions of the Republic of Belarus there was analyzed the productivity of 13-18-month old young stock of cattle which was bred for meat with various levels of energy value nutrition. Also, there were noted their slaughter qualities and chemical composition of meat. Administration of diet rations with an increased level of exchange energy and the best indices of protein fissility rendered a positive influence on productivity of young stock of fattening cattle and made it possible to obtain 1103-1100 gram of body weight gain. As a result, the energy value gain was 22,9-22,6 MJ along with conversion of metabolizable energy at a gain - 24,7-25,3%. Consumption of metabolizable energy per 1 MJ along with body weight gain were within 4,7-5,0 MJ. Feeding of rations with various levels of the studied factor rendered the positive influence on slaughter qualities, made it possible obtain slaughter yield of 53,6-54,6% at an optimum ratio of nutrients in meat. Feeding of bull calves with diets with excessive content (up to 10%) of metabolizable energy made it possible to lower the prime cost of obtained breeding products on 0,55%.
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