POULTRY NUTRITION AND FEED

Effects of Dietary Natural Vitamin E on Performance, Vitamin E Deposition, Antioxidant Function and Egg Quality of Laying Hens during Late Laying Period

  • LINGHU Kechuan ,
  • WANG Chao ,
  • ZHANG Ruiqiang ,
  • CHEN Yueping ,
  • WEN Chao ,
  • ZHOU Yanmin
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  • College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China

Received date: 2021-05-16

  Online published: 2021-12-16

Abstract

This experiment was conducted to study the effects of dietary natural vitamin E on performance, vitamin e deposition, antioxidant function and egg quality of laying hens during late laying period. A total of 270 sixty-six-week-age Hy-line brown laying hens were randomly assigned to 3 groups with 6 replicates in each group and 15 laying hens in each replicate. The laying hens in the control group were fed a basal diet, and the others in experimental groups were fed basal diet supplemented with 100 and 200 mg/kg natural vitamin E, respectively. The experiment lasted for 42 days. The results showed as follows:1) compared with the control group, dietary 100 and 200 mg/kg natural vitamin E increased the egg production by 4.13% and 3.01%, respectively, but the difference was not significant (P>0.05). 2) Compared with the control group, dietary 100 and 200 mg/kg natural vitamin E significantly increased the liver vitamin E content (P<0.05), and dietary 200 mg/kg natural vitamin E significantly increased the serum vitamin E content (P<0.05). 3) Compared with the control group, dietary 100 and 200 mg/kg natural vitamin E significantly increased the jejunal mucosa glutathione peroxidase (GSH-Px) activity (P<0.05); dietary 200 mg/kg natural vitamin E significantly increased the liver GSH-Px activity and jejunal mucosa catalase (CAT) activity (P<0.05), and significantly decreased the liver malondialdehyde (MDA) content (P<0.05). 4) Compared with the control group, dietary 100 and 200 mg/kg natural vitamin E significantly increased the jejunal mucosa copper zinc superoxide dismutase (Cu/Zn-SOD) mRNA relative expression level (P<0.05), and dietary 200 mg/kg natural vitamin E significantly increased the mRNA relative expression levels of nuclear factor erythriod 2-related factor 2 (Nrf2) and glutathione peroxidase 1 (GSH-Px1) in jejunal mucosa (P<0.05). 5) Compared with the control group, dietary 200 mg/kg natural vitamin E significantly increased the albumen height, Haugh units and eggshell thickness of eggs on day 21 (P<0.05). In conclusion, dietary natural vitamin E can increase the laying rate of laying hens during late laying period, and improve the liver vitamin E deposition, enhance the body antioxidant function and improve egg quality. From the aspect of improving performance of laying hens during late laying period, the effects of 100 mg/kg natural vitamin E are better. From the respect of improving the antioxidant function and egg quality of laying hens during late laying period, the effects of 200 mg/kg natural vitamin E are better. Comprehensively consider the factors such as breeding economic benefit and addition cost, the suitable dietary natural vitamin E supplemental level is 100 mg/kg.

Cite this article

LINGHU Kechuan , WANG Chao , ZHANG Ruiqiang , CHEN Yueping , WEN Chao , ZHOU Yanmin . Effects of Dietary Natural Vitamin E on Performance, Vitamin E Deposition, Antioxidant Function and Egg Quality of Laying Hens during Late Laying Period[J]. Chinese Journal of Animal Nutrition, 2021 , 33(12) : 6771 -6781 . DOI: 10.3969/j.issn.1006-267x.2021.12.019

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