本试验旨在探讨不同粗饲料组合对宁夏滩羊生长性能、经济效益、屠宰性能及肉品质的影响。选用平均体重为(26.00±1.93) kg的宁夏母滩羊45只,按同质原则分为3组,每组3个重复,每个重复5只滩羊,3组精饲料相同,占饲粮60%,各组粗饲料分别为30%苜蓿+10%玉米秸秆(Ⅰ组)、15%苜蓿+15%"中科2号"羊草+10%玉米秸秆(Ⅱ组)、30%"中科2号"羊草+10%玉米秸秆(Ⅲ组)。试验期为60 d。结果表明,各试验组滩羊平均日增重均无显著差异(P>0.05),但Ⅱ组经济效益更高。各组屠宰性能指标亦无显著差异(P>0.05)。Ⅱ组系水力比Ⅰ组和Ⅲ组有显著的降低(P<0.05),分别下降了18.63%、19.99%;Ⅰ组剪切力最高,显著高于Ⅲ组(P<0.05),较Ⅱ组和Ⅲ组分别高出了6.41%、15.46%;肉样粗脂肪含量最高的是Ⅲ组,显著高于最低的Ⅰ组(P<0.05),分别较Ⅰ组和Ⅱ组高出了66.74%、14.06%。结果提示,"中科2号"羊草代替苜蓿饲喂滩羊,在不影响宁夏滩羊生长和屠宰性能的前提下,对滩羊肉品质的有一定程度改善,同时可以提高经济效益。

This study was conducted to determine the effects of different roughage combinations on growth performance, economic efficiency, slaughter performance and meat quality of Ningxia Tan sheep. Forty five Ningxia Tan ewes [(26.00±1.93) kg] were randomly divided into three groups with 3 replicates per group and 5 ewes per replicate according to homogeneous principle, the concentrate of different groups was the same and account for 60% in diet, and the roughage combinations were 30% alfalfa+10% maize straw (group Ⅰ), 15% alfalfa+15% Zhongke No.2 Leymus chinensis+10% maize straw (group Ⅱ) and 30% Zhongke No.2 Leymus chinensis+10% maize straw (group Ⅲ), respectively. The experiment lasted for 60 days. The results showed as follows: different roughage combinations did not cause any significant changes of average daily gain of Tan sheep (P>0.05), but the economic efficiency was the highest in group Ⅱ. The slaughter performance among three groups did not have significant difference (P>0.05). Water-holding capacity in group Ⅱ was significantly lower than that in groups Ⅰ and Ⅲ (P<0.05), and were reduced by 18.63% and 19.99%, respectively; shear force in group Ⅰ was significantly higher than that in group Ⅲ (P<0.05), and was increased by 6.41% and 15.46%, respectively, compared with that in groups Ⅱ and Ⅲ. Ether extract content in meat sample in group Ⅲ was significantly higher than that in group Ⅰ (P<0.05), and was increased by 66.74% and 14.06% respectively, compared with that in groups Ⅰ and Ⅱ. In conclusion, Zhongke No.2 Leymus chinensis replaced alfalfa to feed Ningxia Tan sheep can improve meat quality in a certain degree while improving economic efficiency without affecting growth performance and slaughter performance.