Meat production and quality of Holstein bulls fattened to 405-480 kg of live weight
2001
Chladek, G. | Ingr, I. (Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic))
The aim of this study was to evaluate parameters of beef production and quality of meat and their mutual relationships in Holstein bulls. The experimental group consisted of 50 young bulls. They were slaughtered at 405-480 kg of live weight. Mean values of observed parameters were as follows: live weight before slaughter 431.6 kg, age at slaughter 412 days, daily gain 1.094 kg, dressing percentage 51.4 %, net daily gain 0.544 kg, weight and proportion of kidney fat 5.03 kg (2.28 %), fat trim 3.64 kg (3.30 %), dry matter content in muscle 24.9 %, fat in muscle 1.86 %, collagen in muscle 1.15 %, pH24 5.54, drip loss 1.08 % and remission (525 nm) 7.73 %. Feedlot performance parameters affected carcass value to various degree; the total weight gain affected as many as 6 of 7 carcass value parameters (maximum) and the total duration of fattening affected only 1 of 7 parameters (minimum). As for meat quality parameters, the collagen content in muscle was positively affected by the age at slaughter and the fat content in muscle and remission were affected by the total weight gain.
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