This study was conducted to investigate the effects of rapeseed level in concentrates on performance and meat quality of beef cattle. A total of 40 healthy crossbred Simmental beef cattle with initial weigh of (447.00 ±35.67) kg were randomly divided into 4 groups with 10 heads in each group, beef cattle were fed concentrates containing 0, 8. 7% , 17.6% and 26.0% rapeseed, respectively. The experiment lasted 100 days including a 10-day adaptation period and a 90-day formal period. The results showed as follows; 1) average daily gain (ADG) in 17. 6% group was the highest, which was 6. 40% (P >0. 05) and 15. 03% (P < 0. 05) and higher than that in control group and 26.0% group, respectively. 2) With the increase of rapeseed level in concentrates, carcass weight, dressing percentage and net meat percentage all tended to be increased firstly and then decreased, carcass weight in 17.6% group was significantly higher than that in the other groups (P <0. 05) , dressing percentage and net meat percentage in control group were significantly lower than those in 17.6% group (P<0. 05). 4) Shear stress in 17.6% group was the lowest, and was significantly lower than that in control group (P <0. 05). The tenderness was the most considerable. In conclusion, feeding 17.6% rapeseed in concentrate can improve performance and meat quality of beef cattle.%本试验旨在探讨精饲料油菜籽水平对肉牛生产性能及肉品质的影响.选取40头体况良好、平均体重为(447.00±35.67) kg的西门塔尔杂交牛,随机分为4组,每组10头,分别饲喂4种不同油菜籽水平[0(对照组)、8.7％、17.6％和26.0％]的精饲料.预试期10 d,正试期90 d.结果表明:1)17.6％油菜籽组平均日增重最高,比对照组和26.0％油菜籽组分别高6.40％ (P ＞0.05)和15.03％ (P ＜0.05).2)胴体重、屠宰率及净肉率均随油菜籽水平的增加呈先升高后降低的变化趋势,其中17.6％油菜籽组胴体重显著高于其他各组(P＜0.05),对照组屠宰率和净肉率显著低于17.6％油菜籽组(P＜0.05).3)精饲料油菜籽水平对肉牛眼肌面积、大理石花纹、高档肉块重、肉骨比及肉质常规成分均无显著影响(P＞0.05).4) 17.6％油菜籽组肉样剪切力最低,显著低于对照组(P＜0.05),肉样嫩度最好.综合各项指标,精饲料油菜籽水平为17.6％时,能够显著提高肉牛生产性能和肉品质.
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