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1 试验饲粮组成及营养水平（干物质基础）

Table 1 The composition and nutrient levels of the experimental diet (%,DM basis)

项目 Item 200-300 kg体重阶段 200-300 kg live weight 300-400 kg体重阶段 300-400 kg live weight 400-500 kg体重阶段 400-500 kg live weight 组别 Group Ⅰ Ⅱ Ⅲ Ⅰ Ⅱ Ⅲ Ⅰ Ⅱ Ⅲ 蒸汽压片玉米 Steam-flaked corn 55.00 55.00 55.00 60.00 60.00 60.00 65.00 65.00 65.00 浓缩颗粒料 Concentrated pellets1) 35.00 35.00 35.00 30.00 30.00 30.00 25.00 25.00 25.00 羊草 Guinea grass 10.00 10.00 10.00 10.00 10.00 10.00 10.00 10.00 10.00 合计 Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 营养水平 Nutrient levels2) 综合净能 NEmf (MJ·kg-1) 7.05 7.05 7.05 7.10 7.10 7.10 7.16 7.16 7.16 粗蛋白 CP 14.05 15.00 16.04 13.03 14.01 15.00 12.01 13.01 14.00 钙 Ca 0.61 0.61 0.61 0.65 0.65 0.65 0.61 0.61 0.61 磷 P 0.44 0.45 0.45 0.41 0.41 0.41 0.38 0.38 0.38 中性洗涤纤维 NDF 22.33 21.70 21.02 20.71 20.02 19.61 19.52 18.80 18.39 酸性洗涤纤维 ADF 9.41 9.32 9.23 8.77 8.67 8.66 8.28 8.17 8.12