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Asian-Australas J Anim Sci > Volume 30(7); 2017 > Article
Asian-Australasian Journal of Animal Sciences 2017;30(7): 973-978. doi: https://doi.org/10.5713/ajas.15.0850
Effects of simultaneous supplementation of laying hens with α-linolenic acid and eicosapentaenoic acid/docosahexaenoic acid resources on egg quality and n-3 fatty acid profile
Pingping Zhang1, Chuanqiu Tang1, Zongqing Ding1, Hui Huang2, Yong Sun1,*
1Department of Chemical, Biological & Environmental Engineering, Hanjiang Normal University, Hubei, Shiyan 442000, China
2Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072, China
* Corresponding Author: Yong Sun ,Tel: +86-0719552300, Fax: +86-7198846038, Email: sunyong_34@163.com
Received: October 15, 2015;  Revised: November 15, 2015.  Accepted: December 17, 2016.  Published online December 27, 2016.

ABSTRACT
Objective:
The aim of this study was to investigate the effects of simultaneous supplementation of laying hens with alpha-linolenic acid (ALA) resources (flax, perilla, and Eucommia ulmoides [E. ulmoides] seeds) and eicosapentaenoic acid/docosahexaenoic acid (EPA/DHA) resources (Schizochytrium sp.) on egg quality and n-3 polyunsaturated fatty acids (PUFA) profile.
Method:
Dietary treatments were as follows: i) diet C (control diet); ii) diet F (diet C+10% flaxseeds); iii) diet P, (diet C+10% perilla seeds); iv) diet E (diet C+10% E. ulmoides seeds); v) diet A (diet C+1.5% microalage); vi) diet AF (diet C+10% flaxseeds+1.5% microalage); vii) diet AP (diet C+10% perilla seeds+1.5% microalgae); viii) diet AE (diet C+10% E. ulmoides seeds+ 1.5% microalage).
Results:
Egg weight, yolk weight and production ratio were not significantly affected by either algae or in combination with seeds (p>0.05). No significant difference was observed in ALA and DHA concentration in eggs between flaxseed, perila, and E. ulmodies seeds supplementation alone (p>0.05). N-3 PUFA in eggs was slightly improved by microalgae supplementation. The best supplementation, a combination of microalgae and perilla seeds, elevated (p<0.05) ALA from 19.7 to 202.5 mg/egg and EPA+DHA from 27.5 to 159.7 mg/egg. Highest n-3 PUFA enrichment (379.6 mg/yolk) was observed with supplementation of a combination of perilla seed and microalgae (362.2 mg/yolk), followed by a combination of flaxseed and microalgae (348.4 mg/yolk). The ALA, EPA, and DHA content obtained with a combination of microalgae and seeds surpassed the total sum of that obtained with microalgae or ALA-seeds alone.
Conclusion:
It is feasible to enrich eggs with n-3 PUFAs by perilla or E. ulmodies seeds instead of flaxseeds. Simultaneous supplementation of microalgae and seeds helped improve the transfer from EPA and docosapentaenoic acid into DHA.
Keywords: Egg Yolk; Eucommia ulmodies; Flaxseed; Perilla; Schizochytrium sp.; n-3 Polyunsaturated Fatty Acids
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