FOOD. Science. Technology. Quality

Food. SCIENCE. Technology. Quality

Food. Science. TECHNOLOGY. Quality

Food. Science. Technology. QUALITY




Indicator of young bulls slaughter yield and its reference to the commercial value of carcasses


The research material comprised 167 young bulls of Black and White variety of Holstein-Friesian breed, which were fed feed doses containing a high per cent amount of nutritive feed with hay and straw added. The experimental fattening was performed till the young bulls had a weight of about 570 kg. Despite the intense feeding of the young bulls analyzed and despite the daily increases of more than 1 kg in their weight, their carcasses were classified, under the EUROP system, into the R class (22.75 %) and into the O class (77.25 %); as for their fatness, they were classified into Class 1 (11.38 %), Class 2 (58.69 %), and Class 3 (29.94 %). The young bulls with carcasses classified into the R class were characterized by higher mean values of their body weight after the completed fattening, their pre-slaughter weight, their hot carcass weight, and also by a 1.2 % higher mean value of the slaughter yield indicator. On the other hand, the young bulls with carcasses classified into the Fatness Class 1 had lower daily increases in their body weight, a lower pre-slaughter body weight, a lower post-slaughter carcass weight, and a lower indicator of their slaughter yield. The research performed proved a high fluctuation in the mean values of slaughter yield indicator of young bulls, as well as a positive and statistically significant correlation existing between their slaughter yield and their carcass weight, and a negative correlation between this yield and the pre-slaughter weight.


young bulls, carcass, slaughter yield, EUROP, commercial value