POULTRY NUTRITION AND FEED

Methionine Requirement of Youxian Partridge Ducks during Late-Laying Period

  • HUANG Xuan ,
  • YAO Yuezhou ,
  • LI Chuang ,
  • ZHANG Xu ,
  • LI Zhenwei ,
  • JIANG Guitao ,
  • HU Yan ,
  • DAI Qiuzhong
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  • 1. Animal Nutrition and Feeding Technology Research Lab, Hunan Institute of Animal Science and Veterinary Medicine, Changsha 410131, China;
    2. Hunan Engineering Research Center of Poultry Production Safety, Changsha 410128, China;
    3. College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China;
    4. Youxian Animal Husbandry and Aquatic Transaction Center, Youxian 412300, China

Received date: 2021-04-01

  Online published: 2021-10-16

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Abstract

This experiment was conducted to study the effects of dietary methionine level on laying performances, egg quality and serum biochemical and antioxidant indices of Youxian partridge ducks, and to evaluate methionine requirement of Youxian partridge ducks during late-laying period. A total of 300 healthy 56 weeks old Youxian partridge ducks with similar laying rate were randomly divided into 5 groups with 6 replicates in each group and 10 ducks in each group. The dietary methionine levels of five groups were 0.27%, 0.33%, 0.39%, 0.45% and 0.51%, respectively. The experimental period lasted for 9 weeks. The results showed as followed:1) the daily egg yield of 0.39% and 0.45% methionine level groups was significantly higher than that of 0.27% methionine level group (P<0.05), and feed to egg ratio of 0.39% methionine level group was significantly lower than that of 0.27% and 0.33% methionine level groups (P<0.05). 2) The Haugh unit of 0.27% methionine level group was significantly lower than that of other groups (P<0.05). 3) The serum glutathione peroxidase (GSH-Px) activity of 0.45% and 0.51% methionine level group was significantly higher than that of 0.27% and 0.33% methionine level groups (P<0.05), the serum glutathione (GSH) content of 0.39%, 0.45% and 0.51% methionine level groups was significantly higher than that of 0.27% methionine level group (P<0.05), and the serum catalase (CAT) activity of 0.39% and 0.45% methionine level group was significantly higher than that of 0.27% methionine level group (P<0.05). 4) The regression analysis results showed that based on the daily egg yield, feed to egg ratio, Haugh unit and serum CAT activity, the methionine requirements of Youxian partridge ducks during late-laying period were 0.413%, 0.418%, 0.451% and 0.417%, respectively. In conclusion, it can improve egg laying performance and egg quality of Youxian partridge ducks during late-laying period when dietary methionine level is 0.39%, but it can obtain better antioxidant capacity when dietary methionine level is 0.45%. Under this experimental condition, the methionine requirements of Youxian partridge ducks during late-laying period is 0.41% to 0.45%.

Cite this article

HUANG Xuan , YAO Yuezhou , LI Chuang , ZHANG Xu , LI Zhenwei , JIANG Guitao , HU Yan , DAI Qiuzhong . Methionine Requirement of Youxian Partridge Ducks during Late-Laying Period[J]. Chinese Journal of Animal Nutrition, 2021 , 33(10) : 5637 -5644 . DOI: 10.3969/j.issn.1006-267x.2021.10.023

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