Effects of Oregano Essential Oil on Growth Performance, Nutrient Apparent Digestibility and Serum Immune and Antioxidant Indexes of Lamb

  • ZHAO Xiaoya ,
  • SHI Chendi ,
  • TIAN Peizhi ,
  • CHEN Jiaxin ,
  • DUAN Chunhui ,
  • JI Shoukun ,
  • YAN Hui ,
  • LIU Yueqin ,
  • ZHANG Yingjie
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  • College of Animal Science and Technology, Hebei Agricultural University, Baoding 071000, China

Received date: 2021-09-05

  Online published: 2022-04-14

Abstract

The purpose of this experiment was to study the effects of dietary with different levels of oregano essential oil on growth performance, nutrient apparent digestibility and serum immune and antioxidant indexes of lambs. Eighty healthy male lambs of Hu sheep, aged 2 months and body weight of (21.87±0.70) kg, were randomly divided into 4 groups (n=20). Oregano essential oils of 0 (control group), 0.5 (group Ⅰ), 1.0 (groupⅡ) and 1.5 g/kg (group Ⅲ) were added to the basal diet, respectively. The pre-trial period was 7 days and the formal trial period was 60 days. The digestion and metabolism test was carried out 7 days before the end of the feeding test. Body weight and feed intake were recorded during the trial. Blood was collected at the end of the test to determine the immune and antioxidant indexes. The results showed as follows:1) with the increase of adding amount of oregano essential oil, the average daily gain (ADG) and dry matter intake (DMI) of lambs increased gradually, and those in the group Ⅲ were significantly higher than those in the control group (P<0.05), and the feed to gain ratio (F/G) had no significant difference among groups (P>0.05). 2) The apparent digestibility of crude protein and acid detergent fiber in the group Ⅲ was significantly higher than that in the control group (P<0.05), and there was no significant difference between the groups Ⅰ and Ⅱ and the control group (P>0.05); the apparent digestibility of ether extract and neutral detergent fiber in groups Ⅰ, Ⅱ and Ⅲ was significantly higher than that in the control group (P<0.05); dietary with different levels of oregano essential oil had no significant effect on the apparent digestibility of dry matter, gross energy, calcium and phosphorus (P>0.05). 3) Serum total antioxidant capacity (T-AOC) and superoxide dismutase (SOD) activity in the group Ⅲ were significantly higher than those in the control group (P<0.05); serum malondialdehyde (MDA) content in the groupsⅠ, Ⅱ and Ⅲ was significantly lower than that in the control group (P<0.05); serum immunoglobulin A (IgA) content in the group Ⅱ was significantly higher than that in the control group (P<0.05); serum immunoglobulin M (IgM) content in the groupsⅠ, Ⅱ and Ⅲ was significantly higher than that in the control group (P<0.05); serum immunoglobulin G (IgG) content in the groups Ⅰ and Ⅱ was significantly higher than that in the control group (P<0.05). In conclusion, the addition of oregano essential oil in the diet can improve the growth performance of lambs by improving nutrient apparent digestibility, immunity and antioxidant capacity. Under the experimental conditions, the optimum addition amount of oregano essential oil is 1.5 g/kg.

Cite this article

ZHAO Xiaoya , SHI Chendi , TIAN Peizhi , CHEN Jiaxin , DUAN Chunhui , JI Shoukun , YAN Hui , LIU Yueqin , ZHANG Yingjie . Effects of Oregano Essential Oil on Growth Performance, Nutrient Apparent Digestibility and Serum Immune and Antioxidant Indexes of Lamb[J]. Chinese Journal of Animal Nutrition, 2022 , 34(4) : 2534 -2541 . DOI: 10.3969/j.issn.1006-267x.2022.04.048

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