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首页> 外文期刊>Canadian Journal of Animal Science >Carcass characteristics of grass-fed crossbred bulls and steers slaughtered at two different ages
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Carcass characteristics of grass-fed crossbred bulls and steers slaughtered at two different ages

机译：草皮杂交公牛和阉牛的胴体特征在两个不同的年龄屠杀

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摘要

The aim of this study was to evaluate beef production potential and meat quality in young crossbred bulls and steers raised indoors and fed grass-based diets. One half of 96 bull calves were castrated at 2-3 wk of age. The calves were fed standard diets, and starting at 7 mo of age, they received grass silage supplemented with concentrates. At the end of the fattening period (18 and 21 mo of age), the animals were slaughtered, carcass quality was evaluated, and samples of musculus longissimus thoracis were collected to determine the proximate composition and meat quality. The semi-intensive feeding system contributed to higher daily gains (0.835 kg) in Holstein-Friesian (HF) x Hereford (HH) crosses. In comparison with steers, bulls were characterized by a higher dressing percentage (+1.33%), higher weight of five most valuable primal cuts (+6.7 kg), and higher lean meat content of three- rib cuts (+7.54%). Meat from steer carcasses, which had higher fat content was more tender and had desirable aroma, juiciness, and flavor. In semi-intensive production systems, steers performed better than bulls, and HF x HH crosses were more suitable than HF x Limousin (LM) and HF x Charolais (CH) crosses. Dairy-beef crosses should be slaughtered at 21 mo of age to improve carcass quality.
机译：本研究的目的是评估室内饲养和饲喂草食的年轻杂交公牛和阉牛的牛肉生产潜力和肉品质。96头公牛犊牛中有一半在2-3周龄时被阉割。犊牛被喂食标准饲料，从7个月大开始，他们接受补充有浓缩物的青贮饲料。在育肥期（18和21个月龄）结束时，屠宰动物，评估胴体质量，并采集胸部最长肌样本，以确定近似成分和肉品质。在荷斯坦-弗里斯安（HF）x赫里福德（HH）杂交种中，半强化饲养系统有助于提高日增重（0.835千克）。与阉牛相比，公牛的特点是屠宰率更高（+1.33%），五种最有价值的原始肉块重量更高（+6.7 kg），三肋肉块的瘦肉含量更高（+7.54%）。来自阉牛胴体的肉脂肪含量较高，肉质更嫩，具有理想的香气、多汁性和风味。在半集约化生产系统中，阉牛的表现优于公牛，HF x HH杂交比HF x Limousin（LM）和HF x Charolais（CH）杂交更合适。乳牛肉杂交种应在21个月龄时屠宰，以提高胴体质量。

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  • 来源
    《Canadian Journal of Animal Science》 |2018年第2期|共10页
  • 作者

    Pogorzelska-Przybylek Paulina; Nogalski Zenon; Sobczuk-Szul Monika; Purwin Cezary; Momot Martyna;

  • 作者单位

    Univ Warmia &

    Mazury Fac Anim Bioengn Dept Cattle Breeding &

    Milk Evaluat Ul Oczapowskiego 5-137 PL-10719 Olsztyn Poland;

    Univ Warmia &

    Mazury Fac Anim Bioengn Dept Cattle Breeding &

    Milk Evaluat Ul Oczapowskiego 5-137 PL-10719 Olsztyn Poland;

    Univ Warmia &

    Mazury Fac Anim Bioengn Dept Cattle Breeding &

    Milk Evaluat Ul Oczapowskiego 5-137 PL-10719 Olsztyn Poland;

    Univ Warmia &

    Mazury Fac Anim Bioengn Dept Anim Nutr &

    Feed Sci Ul Oczapowskiego 5-248 PL-10719 Olsztyn Poland;

    Univ Warmia &

    Mazury Fac Anim Bioengn Dept Cattle Breeding &

    Milk Evaluat Ul Oczapowskiego 5-137 PL-10719 Olsztyn Poland;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 动物学;
  • 关键词

    bulls; steers; carcass; meat quality; sensory properties;

    机译：公牛队;阉牛;胴体;肉质;感官属性;

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