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Asian-Australas J Anim Sci > Accepted Articles
DOI: https://doi.org/10.5713/ajas.19.0832    [Accepted] Published online April 12, 2020.
Effects of dietary rubber seed oil on production performance, egg quality and yolk fatty acid composition of Hy-Line brown layers
Qiongfen Lu1,3  , Peifu Chen2  , Yan Chai4  , Qihua Li1,3,*  , Huaming Mao1,3,* 
1College of Animal Science and Technology, Yunnan Agricultural University, Kunming 650201, China
2College of Veterinary Medicine, Yunnan Agricultural University, Kunming 650201, China
3Key Laboratory of Animal Nutrition and Feed Science of Yunnan Province, Kunming 650201, China
4Mangshi Bureau of Science and Technology, Dehong 678400, China
Correspondence:  Qihua Li,Email: 2473170727@qq.com
Huaming Mao, Tel: +86-087165227789, Fax: +86-087165220061, Email: maohm@vip.sina.com
Received: 22 October 2019   • Revised: 25 December 2019   • Accepted: 16 March 2020
This study aims to evaluate the effects of dietary supplement of rubber seed oil on production performance, egg quality, and yolk fatty acid composition in laying hens during a 16-week feeding trial period.
Forty-eight 25-week-old laying hens of Hy-Line Brown were randomly divided into three groups. Each group comprised four replicates and each replicate had four birds. Rubber seed oil was incorporated into a corn-soybean meal basal diet by 3.50% (group I), 4.50% (group II), or 0 (control group) and equivalent nutrition was supplied for the test groups and the control group. The performance related values were determined using standard or well established methods.
No significant difference was found in the production performance, the egg quality, the composition of saturated fatty acids (SFA), and the content of cholesterol and monounsaturated fatty acids (MUFA) in the yolk within the three groups. Interestingly, both test groups achieved a significantly higher content of linoleic acid (LA), α-linolenic acid (ALA), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) and a significantly lower content of arachidonic acid (AA) (P<0.05) compared with the control group. With the increased level of dietary rubber seed oil, there was an increasing trend in the content of n-6 polyunsaturated fatty acids (PUFA), n-3 PUFA and total PUFA, but a declining trend in the n-6/n-3 ratio.
These results demonstrate that the rubber seed oil supplemented diet effectively improved the total PUFA content in eggs without impairing the layers’ production performance and the egg quality.
Keywords: Average Egg Weight; Egg Production; Feed Intake; Laying Hens; Polyunsaturated Fatty Acids; Rubber Seed Oil

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