摘要
为探究不同饲养月龄对‘夏南’牛背肌的肉品质、肌内脂肪含量以及长链脂肪酸含量的影响,以新生牛、12月龄和24月龄‘夏南’牛为研究对象,每个月龄选择3头体质量相近的公牛进行屠宰,采集背肌检测pH值、蒸煮损失率、滴水损失率、剪切力等肉品质指标,制作油红O染色切片,检测甘油三酯水平与肌内脂肪质量分数,利用气相色谱-质谱联用技术(gas chromatography-mass spectrometry,GC-MS)分析肌肉中的中长链脂肪酸的组成。结果表明:12月龄‘夏南’牛背肌的pH值显著高于新生牛(P<0.05),新生‘夏南’牛背肌蒸煮损失率显著高于24月龄(P<0.05);24月龄‘夏南’牛背肌的亚油酸含量极显著高于新生牛和12月龄牛肉(P<0.01),12月龄和24月龄‘夏南’牛背肌的花生四烯酸含量极显著高于新生牛(P<0.01),24月龄背肌的总多不饱和脂肪酸含量较其他两个月龄更高。在本研究中,不同饲养月龄的‘夏南’牛肉滴水损失率、剪切力均差异不显著,从肌内脂肪含量和长链脂肪酸组成看,24月龄‘夏南’牛肉更符合人们的健康标准。
To investigate the effects of different slaughter ages on the meat quality,intramuscular fat content and muscular long-chain fatty acid content of the Longissimus dorsi(LD)muscle of Xianan cattle(Bos taurus),newborn,12-month-old and 24-month-old Xianan cattle(three bulls of each age with similar body mass)were slaughtered to measure meat quality indexes of Longissimus dorsi including pH,cooking loss,drip loss and shear force.Oil red O stained sections were prepared and examined.Triglyceride(TG)levels and intramuscular fat content were detected,and the composition of mediumchain and long-chain fatty acids in the muscle was analyzed by gas chromatography-mass spectrometry(GC-MS).The results showed that the pH of the LD of 12-month-old cattle was significantly higher than that of newborn cattle(P<0.05),and the cooking loss of the LD of newborn cattle was significantly higher than that of 24-month-old cattle(P<0.05).The linoleic acid content in the LD of 24-month-old cattle was significantly higher than that in newborn and 12-month-old cattle(P<0.01).The arachidonic acid content in the LD of cattle aged 12 and 12 months was significantly higher than that in newborn cattle(P<0.05).The total polyunsaturated fatty acid(PUFA)content in the LD of 24-month-old cattle was higher than that in newborn and 12-month-old cattle.In this study,there were no significant differences in the drip loss and shear force of the LD among cattle of different ages.In terms of intramuscular fat content and long-chain fatty acid composition,it is suggested that the meat of 24-month-old cattle is more in line with human health standards.
作者
余磊
邢珊珊
李静
许会芬
蔡含芳
李明
YU Lei;XING Shanshan;LI Jing;XU Huifen;CAI Hanfang;LI Ming(College of Animal Science and Technology,Henan Agricultural University,Zhengzhou 450002,China;Animal Health Supervision Institute of Biyang,Zhumadian 463700,China)
出处
《食品科学》
EI
CAS
CSCD
北大核心
2023年第11期9-16,共8页
Food Science
基金
国家自然科学基金青年科学基金项目(32002168)
河南省现代农业产业技术体系建设专项(HARS-22-13-G1)
泌阳县国家现代农业产业园建设专项(NMAIP-BY-S01)。
关键词
饲养月龄
‘夏南’牛
肉品质
肌内脂肪
长链脂肪酸
slaughter age
Xianan cattle
meat quality
intramuscular fat
long-chain fatty acids
