Meat Productivity of Cattle Depending on the Composition of the Ration

The studies present the indices of lifetime beef production of fed and non-fed culled cows and young cattle. The research findings showed that the average preslaughter body weight of cows after fattening upon sale to the meat-processing plants was 696.0 +/- 28.39 kg, and in cows that were not on feed it was 567.0 +/- 15.58 kg, which was 129.2 kg less compared to cows sold after fattening. The average preslaughter body weight of first-calf heifers after fattening when sold to the processing plants was 474.8 +/- 6.87 kg, and in first-calf heifers that were not on feed it was 444.0 +/- 4.29 kg, which was 30.8 kg less compared to first-calf heifers sold after fattening. The average preslaughter body weight of fattened young cattle , ,when sold to the processing plants was 400.50 +/- 4.64 kg, and in young cattle that was not on feed it was 353.25 +/- 8.43 kg, which is 47.25 kg less compared to fattened young cattle. Not a single animal met the criteria of "super", "prima" and "extra" category in terms of the body weight. Preslaughter body weight of studied cows according to age-sex groups also met the criteria for black-and-white cattle breed. Fatness category after fattening of first-calf heifers mainly corresponded to "extra" and "prima" categories, class B and subclass 1, while non-fed first-calf heifers corresponded to "excellent" and "good" category, class G, subclass 1. Fattened young cattle is classified to "good" and "satisfactory" category class G and D, subclass 1 and 2.