FOOD SCIENCE ›› 2019, Vol. 40 ›› Issue (11): 23-29.doi: 10.7506/spkx1002-6630-20180606-067

• Basic Research • Previous Articles     Next Articles

Effects of Dietary Supplementation of Allium mongolicum Regel and Its Extract on Fatty Acid Composition and Contents in Different Carcass Parts of Small-tailed Han Sheep

ZHANG Xiuyuan1,2, WANG Cuifang1, DING He1, LI Shuyi1, AO Changjin1,*   

  1. 1. College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China; 2. School of Agriculture and Forestry Science and Technology, Hebei North College, Zhangjiakou 075000, China
  • Online:2019-06-15 Published:2019-06-28

Abstract: The objective of this study was to investigate the effects of dietary supplementation of Allium mongolicum Regel (AMR) and its extract on the fatty acid composition and contents of lipids in different carcass tissues of small-tailed Han sheep. Healthy sheep were randomly divided into control, AMR polysaccharide, AMR and polysaccharide extraction residue groups. The control group was fed on a basal diet, while the rest were fed on a basal diet supplemented with 0.1% of AMR polysaccharide, 10 g of AMR and 10 g of AMR extraction residue per animal daily, respectively. The pre-experimental period lasted for 15 days, and the formal experimental period lasted for 60 days. At the end of the experiment, Longissimus dorsi, gluteal muscle and subcutaneous fats were collected to determine the composition and contents of fatty acids by gas chromatography-mass spectrometry (GC-MS). The results obtained showed that compared with the control group, the relative contents of C14:1, C16:1, C17:1 and midchain mutton odor fatty acid (MCMOFA) in Longissimus dorsi muscle of the AMR group, C22:6n3 in gluteus muscle of the three experimental groups, C18:1n9c in subcutaneous fat of the AMR group, C18:3n3 in subcutaneous fat of the extraction residue group and C18:3n6 of the polysaccharide and AMR groups were significantly decreased (P < 0.05), while the relative contents of C20:0 in gluteal muscle of the AMR and residue groups, C18:3n6 and C20:1 in gluteal muscle of the AMR group, C10:0, C23:0 and MCMOFA in gluteal muscle of the residue group, C17:0 in subcutaneous fat of the AMR and residue groups, C18:0 and C18:1n9t in subcutaneous fat of the AMR group and C15:1 in subcutaneous fat of the three experimental groups were significantly increased (P < 0.05). In addition, the contents of saturated fatty acid (SFA) and MCMOFA in Longissimus dorsi of the AMR group, polyunsaturated fatty acid (PUFA) in Longissimus dorsi of the three experimental groups, PUFA in the gluteal muscle of the extraction residue group and C18:0 in Longissimus dorsi of the AMR and extraction residue groups were significantly decreased (P < 0.05); the contents of total fatty acids (TFA) in Longissimus dorsi and gluteal muscle of the three experimental groups were decreased (P > 0.05); atherogenic index (AI) in each fatty tissue of the polysaccharide and AMR group, thrombosis index (TI) in Longissimus dorsi of the polysaccharide group were decreased (P > 0.05). Therefore, dietary supplementation of AMR polysaccharide, AMR and extraction residue can adjust fatty acid composition and contents in different carcass parts of sheep, thereby improving the flavor and nutritional value of mutton.

Key words: small-tailed Han sheep, fatty acid, Allium mongolicum Regel, polysaccharide

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