饲粮能量水平对荷斯坦阉牛生产性能、血液指标、屠宰性能及肉品质的影响

张美琦,李妍,李树静,高艳霞,李建国,曹玉凤,李秋凤

Effects of Dietary Energy Levels on Production Performance, Blood Index, Slaughter Performance and Meat Quality of Holstein Steers

ZHANG MeiQi,LI Yan,LI ShuJing,GAO YanXia,LI JianGuo,CAO YuFeng,LI QiuFeng

表4 饲粮能量水平对荷斯坦阉牛屠宰指标的影响

Table 4 Effects of energy levels in diets on Holstein steers slaughtering indicators

项目 Items 组别Groups SEM P LE ME HE 宰前活重Live weight before slaughter (kg) 895.50 897.17 907.17 20.375 0.827 胴体重Carcass weight (kg) 511.64b 516.53ab 543.68a 13.804 0.073 屠宰率Slaughter rate (%) 57.14b 57.57b 59.93a 0.767 0.005 眼肌面积Eye muscle area (cm2) 81.25 78.42 88.25 5.771 0.247 背膘厚度Back fat thickness (mm) 2.25 2.08 2.30 0.388 0.847 大理石花纹等级(5分制) Beef marbling score 3.28 3.11 3.33 0.203 0.531