Effects of dietary vitamins supplementation level on the production performance and intestinal microbiota of aged laying hens

The objective of this study was to investigate the effects of higher vitamins supplementation level on the performance, immunity, and intestinal microbiota of old laying hens. Twelve birds were randomly chosen from 312 healthy, 65-wk-old Hy-Line Brown layers for sampling after a 7-wk acclimation per...

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Bibliographic Details
Published in:Poultry science 2020-07, Vol.99 (7), p.3594-3605
Main Authors: Gan, Liping, Zhao, Yizhu, Mahmood, Tahir, Guo, Yuming
Format: Article
Language:English
Subjects:
Animal Feed - analysis
Animal Nutritional Physiological Phenomena - drug effects
Animals
Antioxidants - metabolism
Chickens - microbiology
Chickens - physiology
Diet - veterinary
Dietary Supplements - analysis
egg quality
Female
Gastrointestinal Microbiome - drug effects
Gastrointestinal Microbiome - physiology
immunity
Immunity - drug effects
laying hen
Metabolism and Nutrition
microbiota
Random Allocation
vitamin
Vitamins - administration & dosage
Vitamins - classification
Vitamins - metabolism
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Summary:The objective of this study was to investigate the effects of higher vitamins supplementation level on the performance, immunity, and intestinal microbiota of old laying hens. Twelve birds were randomly chosen from 312 healthy, 65-wk-old Hy-Line Brown layers for sampling after a 7-wk acclimation period. The remaining 300 hens were randomly allocated to 1 of 4 dietary treatments for a 13-wk feeding trial: basal diet (CON), basal diet with 2-fold supplementation level of lipid-soluble vitamins (LV), 2-fold supplementation level of water-soluble vitamins (WV), or 2-fold supplementation level of both lipid-soluble and water-soluble vitamins (BV), respectively. Compared with 72-wk-old laying hens, the 85-wk-old laying hens showed declined egg quality, which implied by inferior eggshell strength and yolk color (P 
ISSN:0032-5791
1525-3171
DOI:10.1016/j.psj.2020.04.007