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Kühn, J., Wassermann, C., Ebschke, S., Schutkowski, A., Thamm, K., Wensch-Dorendorf, M., Borell, E. V. & Stangl, G. I. (2019) Feasibility of artificial light regimes to increase the vitamin D content in indoor-laid eggs. Poultry Science, 98 5177–5187. 
Added by: Sarina (18 Feb 2020 10:32:36 UTC)   
Resource type: Journal Article
ID no. (ISBN etc.): 0032-5791
BibTeX citation key: 2019
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Categories: Englisch = English
Keywords: bioaddition, egg, laying hen, UVB, vitamin D
Creators: Borell, Ebschke, Kühn, Schutkowski, Stangl, Thamm, Wassermann, Wensch-Dorendorf
Collection: Poultry Science
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ABSTRACT Vitamin D insufficiency is prevalent worldwide. Recently, we showed that exposure of laying hens to sunlight or artificial ultraviolet B (UVB) light is an efficient strategy to increase the vitamin D content in eggs. In the current study, using 2 different chicken genotypes and stocking densities, we addressed the question of whether different UVB-emitting regimes work under real indoor housing conditions in a floor system or in furnished cages. Here, we found a 3.7-fold increase in the egg vitamin D content in Lohmann Selected Leghorn hens and a 4.2-fold increase in Lohmann Brown hens after UVB exposure for 6 h/d. The data further reveal that UVB exposure under high stocking density is equally effective compared to that at low stocking density. The different light regimes were not associated with changes in the behavior of these animals. To conclude, artificial UVB-emitting light regimes are a practical strategy to increase the vitamin D content in indoor-laid eggs.
Added by: Sarina  
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