不同饲草料配比对安格斯牛 生长发育、胴体性状和肉质性状的影响.

Effect of different forage ratios on growth development, carcass traits and meat quality trait of Angus beef cattle.

The experiment was to study the effect of different forage ratio on growth and development, carcass trait and meat quality of Angus cattle. A total of 64 healthy six-month-old Angus cattle (half bulls and half cows) with similar body weight were randomly divided into four groups with four replicates in each group and four cattle in each replicate. Each group cattle was fed a total mixed diet with different forage proportions. The pre-test lasted for 15 d and the formal test lasted for 360 d. The results showed that the body weight of bull and cow in group 1 was significantly higher than that in group 3 and control group at 12 and 18-month-old (P<0.05), the body weight of bull in group 2 was significantly higher than that in group 3 and control group at 12 and 18-month-old (P<0.05), and that in group 2 was significantly higher than that in group 3 and control group at 18-month-old. Average daily gain of bulls and cows in group 1 was significantly higher than that in control group and group 3 at 7~12-month-old (P<0.05), average daily gain of bulls and cows in group 1 was significantly higher than that in group 3 at 13~18-month-old (P<0.05), average daily gain of bulls and cows in group 1 was significantly higher than that in group 3 at 7~18-month-old (P<0.05). The pre-slaughter weight, carcass weight and slaughter rate of bulls in group 1 were significantly higher than those in control group and group 3 (P<0.05), and the eye muscle area and back fat thickness of bulls in group 1 were significantly higher than those in other groups (P<0.05). Muscle and fat color in group 1 and group 2 were significantly lower than those in control group (P<0.05). The study indicates that the forage and feed ratio of group 1 is better for improving the growth and meat quality of Angus cattle. [ABSTRACT FROM AUTHOR]

试验旨在研究不同饲草料配比对安格斯牛生长发育、胴体性状和肉质的影响。选取健康且体重相近 的6 月龄安格斯牛64 头（公、母各半）, 随机分为4 组, 每组4 重复, 每个重复4 头牛。各组牛分别饲喂不同饲草 配比的全混合日粮。预试期15 d, 正式试验期360 d。结果显示：12 月龄、18 月龄试验1 组公、母牛体重均显著高 于试验3 组和对照组（P<0.05）, 12 月龄试验2 组公牛体重显著高于试验3 组（P<0.05）, 18 月龄试验2 组公牛体重 显著高于试验3 组和对照组。7 月龄至12 月龄试验1 组公、母牛平均日增重均显著高于对照组和试验3 组 （P<0.05）, 13 月龄至18 月龄试验1 组母牛平均日增重均显著高于试验3 组（P<0.05）, 7 月龄至18 月龄试验1 组公、 母牛平均日增重显著高于试验3 组（P<0.05）。试验1 组公牛宰前重、胴体重和屠宰率均显著高于对照组和试验 3 组（P<0.05）, 试验1 组的眼肌面积和背膘厚度显著高于其他组（P<0.05）;试验1 组和试验2 组的肌肉和脂肪颜 色显著低于对照组（P<0.05）。研究表明, 试验1 组的饲草料配比对提高安格斯牛生长发育和改善肉品质较好. [ABSTRACT FROM AUTHOR]

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