索朗达;巴贵;杨世帆;张晨光;次仁德吉;德吉;张科;王小龙;吴玉江;

• 1:西藏自治区农牧科学院畜牧兽医研究所
• 2:西北农林科技大学动物科技学院

摘要(Abstract)：

本研究旨在阐明在极端寒冷缺氧的西藏羌塘高原,放牧和舍饲2种饲养方式对西藏山羊背最长肌肉品质、抗氧化指标及脂肪酸含量的影响。将同一时间出生的50只、平均初生重23 kg的雄性羔羊平均分配到完全放牧组和舍饲组饲养1年,每组25只。每组随机挑选5只西藏山羊屠宰,采集背最长肌分析肉品质、抗氧化指标及脂肪酸含量。结果表明:舍饲组屠宰重(21.84 kg)极显著高于放牧组(14.71 kg);舍饲组山羊的肌间脂肪含量高于放牧组(P<0.01),粗蛋白质含量无显著差异;放牧组西藏山羊肌肉的pH和剪切力低于舍饲组(P<0.05),熟肉率和失水率高于舍饲组(P<0.05);放牧组肌肉中豆蔻酸(C14:0)、棕榈酸(C16:0)、十六碳烯酸甘油三酯(C16:1 n9)、油酸(C18:1 10c)和油酸(C18:1 12c)低于舍饲组(P<0.05),支链豆蔻酸(C14:0 iso)、十四碳烯酸(C14:1)和共轭亚油酸(9c,13t CLA)含量高于舍饲组(P<0.05)。综上所述,2种不同的饲养系统不会引起动物屠宰后肌肉内的氧化反应差异,放牧条件下西藏山羊肌肉中多不饱和脂肪酸(PUFA)含量增加,从而提高羊肉的营养价值。

关键词(KeyWords)： 饲养方式;肉品质;抗氧化;脂肪酸;西藏山羊

Abstract:

Keywords:

基金项目(Foundation): 西藏科技厅“十三五”重大农业专项(XZ201801NA03);; 现代农业产业技术体系建设专项资金(CARS-39-32)

作者(Authors): 索朗达;巴贵;杨世帆;张晨光;次仁德吉;德吉;张科;王小龙;吴玉江;

DOI: 10.19556/j.0258-7033.20190501-01

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