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Effects of dietary Mn-methionine supplementation on the egg quality of laying hens.
Li, L L; Zhang, N N; Gong, Y J; Zhou, M Y; Zhan, H Q; Zou, X T.
Afiliação
  • Li LL; Feed Science Institute, College of Animal Science, Zhejiang University, Hangzhou, China, 310058.
  • Zhang NN; Feed Science Institute, College of Animal Science, Zhejiang University, Hangzhou, China, 310058.
  • Gong YJ; Feed Science Institute, College of Animal Science, Zhejiang University, Hangzhou, China, 310058.
  • Zhou MY; Feed Science Institute, College of Animal Science, Zhejiang University, Hangzhou, China, 310058.
  • Zhan HQ; Feed Science Institute, College of Animal Science, Zhejiang University, Hangzhou, China, 310058.
  • Zou XT; Feed Science Institute, College of Animal Science, Zhejiang University, Hangzhou, China, 310058.
Poult Sci ; 97(1): 247-254, 2018 Jan 01.
Article em En | MEDLINE | ID: mdl-29077932
ABSTRACT
This study was conducted to investigate the effects of dietary manganese-methionine (Mn-Met) supplementation on the egg quality of laying hens. A total of 480 Jinghong-1 strain layers aged 53 wk were divided into 5 groups with 6 replicates of 16 layers. Birds in the control group were fed a diet supplemented with 60 mg Mn/kg in the form of MnSO4; the birds in other 4 experimental groups were fed a diet supplemented with 20, 40, 60, and 80 mg Mn/kg as Mn-Met, respectively. Dietary Mn-Met treatments significantly affected (P < 0.05) the albumen height, yolk color, and Haugh unit compared to those of the control diet. The Mn contents in the eggshell increased (P < 0.01) significantly by increasing the Mn-Met supplementation, whereas Mn content in eggshell was triple that in the yolk or albumen. Compared with the 60 mg/kg Mn-Met group, the transverse surface in the control group had (P < 0.01) a greater width of mammillary cones, and there were obvious cracks on the outer surface in the control. There was no difference (P > 0.05) in the eggshell gland (ESG) in the expression of calbindin-D28k (CaBP-D28k) mRNA in response to any diet treatment. In conclusion, dietary Mn-Met supplementation increased internal egg quality and the ultrastructure of the eggshell. Compared to the control, 60 mg/kg Mn-Met treatment resulted in improving egg quality, and 20 mg/kg Mn-Met treatment had similar effects the control treatment had on the egg quality. This indicates that the inorganic Mn can be replaced by the lower concentration of Mn-Met.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Compostos Organometálicos / Óvulo / Galinhas / Casca de Ovo / Metionina Idioma: En Ano de publicação: 2018 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Compostos Organometálicos / Óvulo / Galinhas / Casca de Ovo / Metionina Idioma: En Ano de publicação: 2018 Tipo de documento: Article