ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2019, Vol. 50 ›› Issue (6): 1208-1218.doi: 10.11843/j.issn.0366-6964.2019.06.011

• ANIMAL NUTRITION AND FEEDS • Previous Articles     Next Articles

Effects of Oregano Essential Oil on Fatty Acid Composition and Conjugated Linoleic Acid Content in Muscle of Gansu Alpine Fine-wool Sheep

LIANG Tingyü1, LIU Ting1, GONG Xuyin2, WU Jianping1,2*, ZHANG Rui1, GAO Liangshuang1   

  1. 1. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China;
    2. Animal Husbandry, Pasture and Green Agriculture Institute, Gansu Academy of Agricultural Sciences, Lanzhou 730070, China
  • Received:2018-12-12 Online:2019-06-23 Published:2019-06-23
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Abstract: The purpose of this experiment was to study the effects of oregano essential oil on the fatty acid composition in muscles of Gansu Alpine Fine-wool sheep. Thirty 60-day-old healthy Gansu Alpine Fine-wool sheep with the similar body condition were selected and randomly divided into 3 groups:control group, adding 2 and 4 g·d-1 oregano essential oil groups (group I and group Ⅱ). There were 10 sheep per group. Six sheep in each group were slaughtered randomly after 3 month, the samples of longissimus dorsi (LD) muscle and semitendinosus (SE) muscle were collected, and the fatty acid composition and conjugated linoleic acid (CLA) content were measured. The results showed that:1) The concentration of blood HDL-C of ewes in group I and rams in group Ⅱ was significantly lower than that of ewes in control group (P<0.05), and there was no significant difference in other blood biochemical parameters (P>0.05) among the 3 groups. 2) Oleic acid (C18:1n9c) and palmitic acid (C16:0) were the main fatty acids in muscle of different parts. In LD muscle, the content of MUFA and UFA of the ewes in control group were significantly higher than that of rams in control group(P<0.05), while the content of n-6PUFA of ewes in control group was significantly lower than that of rams in control group (P<0.05), the SFA content of rams in group I was significantly higher than that of rams in group Ⅱ(P<0.05); The content of MUFA of rams in group Ⅱ was significantly higher than that of ewes in groupⅡ, the rams in control group and group I(P<0.05); The content of PUFA of ewes in group Ⅱ was significantly higher than that of rams in group Ⅱ, ewes in control group and group I(P<0.05), the UFA content of rams in group I was significantly lower than that of rams in group Ⅱ(P<0.05). In SE muscle, the contents of PUFA, n-6PUFA and n-3PUFA of rams in control group were significantly higher than that of ewes in control group (P<0.05), the MUFA content of rams in group Ⅱ was significantly higher than that of rams in control group and group I(P<0.05), n-6/n-3 content of rams in group I was significantly higher than that of ewes in group I (P<0.05). 3) The content of c9t11-CLA in muscles of ewes was higher than that of rams in the 3 groups, and the content of c9t11-CLA of ewes in group I was significantly higher than that of rams in group I (P<0.05); The c9t11-CLA content in LD muscle of rams and ewes in group Ⅱ was significantly higher than that in control group (P<0.05), and there was no significant difference between group I and group Ⅱ (P>0.05). In summary, the fatty acids composition in muscle of Gansu Alpine Fine-wool sheep are different with animal sex, tissue location and additive dosage, adding oregano essential oil in diet can increase CLA content in muscle, and the supplementation effect of 4 g·d-1is better than 2 g·d-1.

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