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Asian-Australas J Anim Sci > Accepted Articles
DOI: https://doi.org/10.5713/ajas.18.0573    [Accepted] Published online January 4, 2019.
Rubber seed oil and flaxseed oil supplementation on serum fatty acid profile, oxidation stability of serum and milk, and immune function of dairy cows
Yu Pi1,2, Lu Ma1, Hongrong Wang2, Jiaqi Wang1, Jianchu Xu3, Dengpan Bu1,4,5,*
1State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China
2College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China
3Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
4Synergetic Innovation Center of Food Safety and Nutrition, Harbin 150030, China
5CAAS-ICRAF Joint Laboratory on Agroforestry and Sustainable Animal Husbandry, World Agroforestry Centre, East and Central Asia, Beijing 100193, China
Correspondence:  Dengpan Bu,Email: budengpan@126.com
Received: 31 July 2018   • Revised: 2 November 2018   • Accepted: 18 December 2018
Abstract
Objective: This study was designed to investigate the effect of diet supplementation with rubber seed oil and flaxseed oil on serum fatty acids profile, oxidation stability of serum and milk, and immune function of dairy cows.

Methods

Forty-eight mid-lactation Holstein dairy cows were randomly assigned to one of four treatments for 8wk, including basal diet (CON) or the basal diet supplemented with 4% rubber seed oil (RO), 4% flaxseed oil (FO) or 2% rubber seed oil plus 2% flaxseed oil (RFO) on a DM basis.

Results

Compared with CON, all the oil groups increased the levels of trans-11 C18:1 (vaccenic acid, VA), cis-9, trans-11 C18:2 (conjugated linoleic acid, CLA) and C18:3 (α-linolenic acid, ALA) in serum. Both the activity of glutathione peroxidase and catalase in serum and milk in oil groups were decreased, which were negatively correlated with the levels of cis-9, trans-11 CLA and ALA. The concentrations of proinflammatory factors (TNF-α and INF-γ) in serum of oil groups were lower than that from the CON cows.
Conclusion
These results indicate that diet supplementation with rubber seed oil or flaxseed oil could alter serum fatty acid profile and enhance the immune function of dairy cows. However, the negative effect on milk oxidation stability should be considered when feeding these n-3 PUFA-enriched oils in dairy production.
Keywords: Vegetable Oils; Linolenic Acid; Polyunsaturated Fatty Acid; Lipid Oxidation; Immunity; Lactating Cows
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