谷饲饲粮粗蛋白质水平对荷斯坦公牛屠宰性能和肉品质的影响

赵洋洋,李妍,韩永胜,王晓玲,李建国,高艳霞,曹玉凤,李秋凤

The Slaughter Characteristics and Meat Quality of Holstein Bulls Grain-Fed Under Different Dietary Crude Protein Levels

YangYang ZHAO,Yan LI,YongSheng HAN,XiaoLing WANG,JianGuo LI,YanXia GAO,YuFeng CAO,QiuFeng LI

表2 不同粗蛋白质水平饲粮对奶公牛屠宰性能的影响

Table 2 Effects of different dietary crude protein levels on slaughter characteristics of Holstein bulls

项目 Item 组别Group SEM P值 P value Ⅰ Ⅱ Ⅲ 宰前活重 Live weight (kg) 501.40±2.96 503.60±3.82 514.00±2.00 4.01 0.06 热胴体重 Hot carcass weight (kg) 273.36±3.83 278.92±3.04 284.00±4.47 5.41 0.19 屠宰率 Dressing (%) 54.52±0.64 55.38±0.28 55.25±0.87 0.91 0.61 骨重 Bone weight (kg) 46.42±0.70 48.36±2.30 49.55±1.18 2.19 0.38 胴体肉重 Carcass meat weight (kg) 226.94±4.00 230.56±2.61 234.45±4.93 5.60 0.43 肉骨比 Meat/Bone 4.83±0.15 4.86±0.08 4.84±0.23 0.23 0.99 净肉率 Net meat percentage (%) 45.26±0.65 45.79±0.47 45.61±0.98 1.03 0.87 胴体产肉率 Carcass yield (%) 82.73±0.32 82.94±0.16 82.94±0.49 0.49 0.88 眼肌面积 Longissimus muscle area (cm2) 77.12±1.53b 80.66±1.01ab 82.28±1.66a 2.02 0.03 背膘厚度 Back fat thickness (mm) 6.33±0.75 6.34±0.60 6.16±0.23 0.81 0.97 脂肪色 Fat color 2.00±0.20 1.80±0.20 1.60±0.24 0.26 0.34