Effects of Selenium Supplemental Level on Laying Performance, Egg Quality, Serum Antioxidant Indices and Dynamic Change of Egg Selenium Content of Linwu Ducks during Peak Laying Period

HUANG Xuan, LI Chuang, JIANG Guitao, ZHANG Xu, WANG Xiangrong, HU Yan, LIU Bocheng, DAI Qiuzhong

doi:10.3969/j.issn.1006-267x.2017.12.013

2017 , Vol. 29 >Issue 12: 4334 - 4341

DOI: https://doi.org/10.3969/j.issn.1006-267x.2017.12.013

Molecular Nutrition

Effects of Selenium Supplemental Level on Laying Performance, Egg Quality, Serum Antioxidant Indices and Dynamic Change of Egg Selenium Content of Linwu Ducks during Peak Laying Period

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1. College of Animal Science and Technology, Hunan Agricultural University, Hunan Collaborative Innovation Center of Animal Production Safety, Changsha 410128, China;
2. Hunan Institute of Animal Science and Veterinary Medicine, Changsha 410131, China;
3. Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China

Received date: 2017-05-16

Online published: 2017-12-04

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Abstract

This experiment was conducted to study the effects of selenium supplemental level on laying performance, egg quality, serum antioxidant indices and dynamic change of egg selenium content of Linwu ducks during peak laying period. Two hundred 29-week-old healthy Linwu ducks with a similar laying rate and in peak laying period were randomly assigned to 5 groups with 5 replicates in each group and 8 ducks per replicate. The ducks in control group were fed a basal diet without adding selenium source and the measured value of selenium content was 0.15 mg/kg, while the ducks in groups Ⅰ, Ⅱ, Ⅲ and Ⅳ were fed the basal diet supplemented with 0.10, 0.20, 0.40 and 0.80 mg/kg selenium in forms of selenium yeast, respectively. The experimental diets were fed with 35 d for each group, then stop to supplement selenium and the basal diet were fed within 10 days. The results showed as follows:1) dietary selenium supplemental level had no significant effects on the indices of laying performance and egg quality of laying duck (P>0.05). 2) Compared with the control group and group Ⅰ, supplementation of 0.40 and 0.80 mg/kg selenium could significantly increase the serum selenium and glutathione (GSH) contents, and glutathione peroxidase (GSH-Px) and superoxide dismutase (SOD) activities (P<0.05), while significantly decrease the serum malonaldehyde (MDA) content (P<0.05). 3) As the experimental days increasing, the egg selenium content in the control group and group Ⅰ showed no significant change (P>0.05), the egg selenium content in the groups Ⅱ, Ⅲ and Ⅳshowed increase firstly and then decrease trend, and those groups reached peak in the test day 9. The egg selenium content in the groups Ⅱ, Ⅲ an Ⅳ was significantly higher than that in the control group and group Ⅰ at the test day 7, 9, 13, 17, 21, 28 and 35. Stop to feed selenium supplementation diets at day 1 to 4, the egg selenium content in groups Ⅱ, Ⅲ and Ⅳ were still significantly higher than that in the control group (P<0.05). Stop to feed selenium supplementation diets at day 5 to 8, the egg selenium content in groups Ⅲ and Ⅳ was significantly higher than that in control group (P<0.05). Stop to feed selenium supplementation diets at day 9, the egg selenium content of all groups was recovery to the same level with control group (P>0.05). In conclusion, the laying performance and egg quality of Linwu duck during peak laying period are not affected by different selenium supplemental level; antioxidant capacity, serum selenium content and egg selenium content of Linwu duck during peak laying period can be improved by supplementation of 0.40 and 0.80 mg/kg selenium in the form of yeast selenium. Supplementation of 0.40 and 0.80 mg/kg selenium can prolong the retention of egg. Comprehensive consideration of all the factors, the optimum selenium supplemental level of Linwu ducks in peak laying period is 0.40 mg/kg.

Key words： yeast selenium; antioxidant capacity; egg selenium content; Linwu ducks

Cite this article

HUANG Xuan, LI Chuang, JIANG Guitao, ZHANG Xu, WANG Xiangrong, HU Yan, LIU Bocheng, DAI Qiuzhong . Effects of Selenium Supplemental Level on Laying Performance, Egg Quality, Serum Antioxidant Indices and Dynamic Change of Egg Selenium Content of Linwu Ducks during Peak Laying Period[J]. Chinese Journal of Animal Nutrition, 2017 , 29(12) : 4334 -4341 . DOI: 10.3969/j.issn.1006-267x.2017.12.013

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