[Classification of bulls according to their carcass composition]
2003
Polach, P. | Bjelka, M. | Vacatko, E. (Vyzkumny Ustav pro Chov Skotu, Rapotin (Czech Republic)) | Subrt, J. | Krestynova, M. (Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic)) | Frelich, J. | Voriskova, J. (Jihoceska Univ., Ceske Budejovice (Czech Republic)) | Polak, P. | Huba, J. (Vyskumny Ustav Zivocisnej Vyroby, Nitra (Slovak Republic))
Relationships between fattening parameters and slaughter values of beef carcasses were determined. In total 216 bulls were slaughtered and evaluated by the SEUROP system. The dressing percentage, the weight of meat, bones and separable fat, and the meat/bone ratio were calculated. The daily weight gain and the net weight gain declined from the class E (1,148 g/day, 666 g/day) to the class O (943 g/day, 534 g/day). Significant differences between the classes were found for the lean meat content (LMC) and bone content (BC). The higher LMC was found in the class E (78.6%), the lower one in the class P (72.7%), whereas the higher BC was measured in O and P classes. High values of the net gain (783 g/day) and meat content (78.9%) were detected in the fat class 5 while the highest bone content (20.3%) was found in the class 1. Increasing the growth intensity and the slaughter weight improves the carcass classification because of high values of LMC, but it debases the fat score. Subjective classification by the SEUROP system can not exactly describe the carcass composition by the content of primary cuts.
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