期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：315
期号：7
页码：1-6
DOI：10.1088/1755-1315/315/7/072034
出版社：IOP Publishing
摘要：The research findings showed that the carcass weight of cows after fattening made 325.20±18.23 kg, and in cows that were not on feed it was 251.34±10.23, which was 73.86 kg less compared to cows sold after fattening. The carcass yield made 46.70 and 44.26±0.61% or 2.44% higher, respectively. The carcass weight of first-calf heifers after fattening made 193.78±2.81 kg, and in first-calf heifers that were not on feed it was 171.0±2.98 kg, which was 22.78 kg less compared to first-calf heifers after fattening. The carcass yield made 40.80 and 38.50±0.46% or 2.30% higher, respectively. The carcass weight of young cattle after fattening made 183.2±4.49 kg, and in young cattle that was not feed it was 136.93±5.69 kg, which was 46.27 kg less compared to young cattle sold after fattening. The carcass yield made 45.70±0.63 and 38.70±0.70% or 7.00% higher, respectively. The carcass yield in all age-sex groups corresponds to the indices for black-and-white breed. Not a single carcass of slaughtered animals is qualified as "super", "prima", "extra" and "excellent" category because they do not meet the requirements of GOST according to the carcass weight. The carcass of slaughtered animals is mainly qualified as "good", "satisfactory" and "low" category. The results of the slaughtering of the researched animals by age-sex groups are as follows. The first-calf heifers after fattening belong to "good" category; because their carcass weight is in the range of 187.3-204.1, class G, subclass 1. The first-calf heifers without fattening correspond mainly to "satisfactory" category, because their carcass weight is in the range of 163.5-183.6 kg, class D and subclass 2. The heifers between the age of 8 month and 3 years old after fattening are mainly qualified as "excellent" category, because their carcass weight is in the range of 166.8-193.9 kg, class G, subclass 1. The heifers between the age of 8 month and 3 years old without fattening are mainly qualified as "low" category, because their carcass weight is in the range of 1128.1-153.5 kg, class D and subclass 2.
