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| 脂肪酸鉴定及其在牦牛乳、牦牛肉品质分析中的应用 |
| Fatty acid identification and its application in yak milk andyak meat quality analysis |
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| DOI： |
| 中文关键词: 牦牛乳 牦牛肉 犏牛乳 支链脂肪酸 多不饱和脂肪酸 |
| 英文关键词:yak milk yak meat pien niu milk branched chain fatty acid polyunsaturated fatty acid |
| 基金项目:青海省科技厅项目(2017-ZJ-711) |
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| 中文摘要: |
| 利用气相色谱-质谱对不同来源的牦牛乳、犏牛乳和牦牛肉脂肪酸组成及含量进行检测，以功能性脂肪酸含量为指标对牦牛乳和牦牛肉的品质进行评价。结果表明：牦牛乳、犏牛乳和牦牛肉中分别鉴定出47、46、37种脂肪酸；不同月份、海拔的牦牛乳中BCFA含量和n-6/n-3比值整体差异极显著（P＜0.001），对比发现8月份采自3 500 m夏季牧场的牦牛乳品质最优；犏牛乳中富含多种功能性脂肪酸，接近牦牛乳脂肪酸组成；两种饲养方式（放牧和舍饲育肥）牦牛肉中功能性脂肪酸含量和n-6/n-3比值差异显著，放牧牦牛肉中DHA、DPA、EPA、BCFA等功能性脂肪酸含量均显著高于舍饲育肥牦牛肉，相较于舍饲育肥牦牛，放牧牦牛的牦牛肉品质更佳。 |
| 英文摘要: |
| The fatty acid compositions and contents of yak milk, pien niu milk and yak meat from different sources were detected by GC-MS,and the content of functional fatty acids was mainly used to evaluate the quality of yak milk and yak meat. The results showed that 47,46 and 37 fatty acids were identified from yak milk,pien niu milk and yak meat, respectively. The content of branched chain fatty acids (BCFA) and n-6/n-3 ratio in yak milk of different months and altitudes were very significant (P <0001). By comparison, it was found that the quality of yak milk collected from 3 500 m summer pasture in August was the best.Pien niu milk was rich in functional fatty acids, which was close to the fatty acid composition of yak milk.The difference in the content of functional fatty acids and n-6/n-3 ratio in yak meat by different feeding methods was significant.The contents of DHA, DPA, EPA, BCFA and other functional fatty acids in grazing yak meat was significantly higher than feeding fattening yak meat, so the quality of grazing yak meat was better. |
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