Indicator of young bulls slaughter yield and its reference to the commercial value of carcasses
2011
Wajda, St. | Burczyk, E. | Daszkiewicz,T.,Uniwersytet Warminsko-Mazurski, Olsztyn (Poland). Katedra Towaroznawstwa i Przetworstwa Surowcow Zwierzecych
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 and into the O class; as for their fatness, they were classified into Class 1, Class 2 and Class 3. The young bulls with carcasses classified into 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 percent 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 pos-slaughter carcass weight, and the lower indicator of their slaughter yield
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