Meat productivity of crossbred cattle improved by Red Steppe and Black-motley breeds
The article describes the results of studying crossbred cattle. Under equal keeping conditions and moderate feeding the sons of the Red Steppe mothers and the Red Danish and Holstein fathers (groups I and III) used 7-19% less feed units and 6-15% less protein per 1 kg of weight gain than crossbred bull calves of the Red Steppe and Angler, Black-motley and Holstein breeds (groups II and IV). No regularity was found in the consumption of feed per 1 kg of weight gain between the sons of breed improvers of different categories and interbreed hybrids. There was a similar situation regarding the use of digested protein. As for the effectiveness of feed use at the age of 0-6 months, the best results were shown by the bulls of group I, 6-12 months – group IV, 12-18 months – group III. The revealed superiority in the live weight in the offsprings of individual producers, as well as in interbreed combinations (groups I, III and IV), is the result of the higher energy of their growth during the periods. The improvement of the Red Steppe and Black-motley cattle by crossing them with specialized dairy breeds does not have an adverse impact on the meat productivity and slaughter qualities of crossbred cattle in the conditions of moderate feeding.
Meat productivity of crossbred cattle improved by Red Steppe and Black-motley breeds
The article describes the results of studying crossbred cattle. Under equal keeping conditions and moderate feeding the sons of the Red Steppe mothers and the Red Danish and Holstein fathers (groups I and III) used 7-19% less feed units and 6-15% less protein per 1 kg of weight gain than crossbred bull calves of the Red Steppe and Angler, Black-motley and Holstein breeds (groups II and IV). No regularity was found in the consumption of feed per 1 kg of weight gain between the sons of breed improvers of different categories and interbreed hybrids. There was a similar situation regarding the use of digested protein. As for the effectiveness of feed use at the age of 0-6 months, the best results were shown by the bulls of group I, 6-12 months – group IV, 12-18 months – group III. The revealed superiority in the live weight in the offsprings of individual producers, as well as in interbreed combinations (groups I, III and IV), is the result of the higher energy of their growth during the periods. The improvement of the Red Steppe and Black-motley cattle by crossing them with specialized dairy breeds does not have an adverse impact on the meat productivity and slaughter qualities of crossbred cattle in the conditions of moderate feeding.
Improve the feeding standards of gobies raised for meat
The article describes the results of the study of the effects of different levels of general and protein nutrition, diets with a reduced level of protein, the effect of synthetic lysine and methionine on digestive and metabolic processes, the growth intensity of young cattle and their meat productivity. According to the results of the study, the norm of fiber in the diets of gobies fed at year-round sites in winter conditions was established. The production inspection showed a high efficiency of detailed feeding standards, as well as little information about the change in the need for animals for basic nutrients depending on climatic conditions when harvesting and fattening livestock at year-round sites.
Improve the feeding standards of gobies raised for meat
The article describes the results of the study of the effects of different levels of general and protein nutrition, diets with a reduced level of protein, the effect of synthetic lysine and methionine on digestive and metabolic processes, the growth intensity of young cattle and their meat productivity. According to the results of the study, the norm of fiber in the diets of gobies fed at year-round sites in winter conditions was established. The production inspection showed a high efficiency of detailed feeding standards, as well as little information about the change in the need for animals for basic nutrients depending on climatic conditions when harvesting and fattening livestock at year-round sites.
