摘要
分别选4只5月龄鲁西黑头肉羊和小尾寒羊屠宰,测定常规指标,同时取背最长肌和股二头肌测定肌肉中化学成分、氨基酸、脂肪酸、矿物质和微量元素含量。结果表明:鲁西黑头肉羊屠宰率为55.09%,比小尾寒羊提高8.83个百分点,净肉重比小尾寒羊提高32.48%(P<0.01);眼肌面积比小尾寒羊增加27.2%(P<0.05)。经测定,鲁西黑头肉羊与小尾寒羊肌肉的pH值,肌肉的剪切力,肌纤维密度,粗蛋白质和18种氨基酸总量等均与小尾寒羊差异不显著。鲁西黑头肉羊ω-6与ω-3脂肪酸的比例为4.54～5.17∶1,肌肉中S∶M∶P比接近1∶1∶1,达到世界卫生组织和联合国粮农组织推荐标准。综合分析表明,鲁西黑头肉羊肌肉硬脂酸含量低,膻味轻,而且胆固醇含量低(59.19mg),肉质品质好,是生产优质高档羊肉的理想群体。
Four 5-month-old Luxi Black Mutton Sheep and Small-tail Han Sheep were selected respec- tively , to detect the conventional index as well as the indicators as chemical composition, amino acid, fatty acid, mineral composition and microelements in longissimus thoracis and biceps muscle of thigh. The resuits showed that the dressing rate of Luxi Black Head Mutton Sheep was 55.09%, improving by 8.83 than that of Small-tail Han Sheep. The net meat weight and eye muscle area increased by 32.48% （P〈 0.01） and 27.2% （P〈0.05） respectively than that of Small-tail Han Sheep. It was determined that the pH value, muscle shear force, muscle fiber density, crude protein and the total content of 18 amino acids of Luxi Black Head Mutton Sheep were all of insignificant difference than that of Small-tail Han Sheep. The proportion of w-6 and w-3 fatty acid of Luxi Black Head Mutton Sheep was 4.54-5.17 ： 1, and S ： M ： P in muscle is close to 1 ： 1 ： 1, which reached the standards recommended by WHO and FAO. The compre- hensive analysis showed that the muscle of Luxi Black Head Mutton Sheep has lower stearic acid and cho- lesterin （59.19mg）, the mutton quality is good, which is an ideal population for high quality mutton.
出处
《家畜生态学报》
北大核心
2012年第4期52-56,共5页
Journal of Domestic Animal Ecology
基金
国家现代农业产业技术体系
山东省农业良种工程专项资金资助
关键词
鲁西黑头肉羊
屠宰率
化学成分
氨基酸
脂肪酸
胆固醇
微量元素
Luxi Black Head Sheep
dressing percentage
chemical composition
amino acids
fattyacids
cholesterin
microelements
