【摘要】 旨在研究比较晋南牛公牛和阉牛的育肥性能、屠宰性能和肉品质。选择健康状况良好、体重相近的晋南公牛和阉牛各10头,通过300 d的强度育肥试验后屠宰测定各项指标。结果显示,公牛组的平均日增重、宰前活重、胴体重、屠宰率和眼肌面积均显著高于阉牛组(P<0.05),而优质切块率组间差异不显著(P>0.05)。屠宰排酸72 h后,阉牛组大理石花纹评分显著高于公牛组、剪切力显著低于公牛组(P<0.05)。而pH值、失水率和肉色组间差异不显著(P>0.05),阉牛组大理石纹等级平均达到三级以上,接近于生产高档牛肉的标准。因此,晋南牛可通过阉割育肥生产高档牛肉。更多还原

【Abstract】 The purpose of this experiment is to compare the fattening traits,slaughter performance and meat quality between Jinnan cattle bulls and steers. Twenty healthy bulls and steers at the similar age and body weight were chosen to perform intensive fattening experiment and to measure carcass traits including every meat parameter. The results showed that the average daily gain of bulls,liveweight,carcass weight and eye muscle area were significantly higher than steers( P<0. 05),while aged beef quality cutting rates were not different between treatments( P>0. 05). After 72 hours,shear force of steers was significantly better than those of bulls,marbling was significantly lower than those of bulls. The pH value,driage and meal color were not different( P> 0. 05). The marbling grade of steers reached 3 grade that was close to standard high-grade beef. Therefore,Jinnan cattle can produce high-grade beef fattening by castration.更多还原