Variation in Egg Yolk Colour in Different Systems of Rearing Laying Hens

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62157124%3A16270%2F10%3A00002768" target="_blank" >RIV/62157124:16270/10:00002768 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Variation in Egg Yolk Colour in Different Systems of Rearing Laying Hens
Original language description
72 laying hens (ISA BROWN hybrid combination) were divided into two groups. 36 layers in the first group were reared on litter while the second group of layers was reared using the cage rearing system. Samples of eggs were collected from both groups fora period of seven months. Yolk colour was determined using a portable spectrophotometer using a newly developed method, which complied with the CIELAB system. Yolk colour parameter L* decreased for the rearing system on litter, i.e. egg yolk colour became darker in the course of the whole experiment (? = 0.05). Parameter a* showed a distinct increase in the case of the rearing system on litter, with the differences being significantly (? = 0.05) over the last three months of the experiment. Differencesfor the whole experiment were highly conclusive (? = 0.01), as seen from an increasing red colour intensity. Similarly, parameter b* also increased, i.e. egg yolk was of more distinct yellow colour. In the case of the cage-rearing system,
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
GM - Food industry
OECD FORD branch
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Publication year
2010
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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