NDLI: Comparison of production and egg quality parameters of laying hens housed in conventional and enriched cages.

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Comparison of production and egg quality parameters of laying hens housed in conventional and enriched cages.

Content Provider	Semantic Scholar
Author	Karkulín, D.
Copyright Year	2006
Abstract	Production and egg quality parameters between two g roups of Isa-Brown hens housed in conventional and enriched cages were evaluated in t his experiment. Production parameters (hen-day egg production, hen-day feed consumption, feed consumption per egg) and mortality were recorded daily. Egg quality parameters, as wel l as number of downgraded eggs, were evaluated monthly during whole laying period. Conce rning production parameters no statistical differences among the groups were found. Hen-day eg g production in both types of cages has reached similar values (87.57% in conventional and 88.72% in enriched cages). Percentage of downgraded eggs (cracked, soiled) tended to be slig htly higher in conventional cages (6.32%) compared with enriched ones (5.99%). Cage enrichmen t caused an increase in number of broken and cracked eggs compared to the conventiona l cage housing, however more soiled eggs was recorded in latter cage system. Type of caging significantly affects only egg weight hens housed in enriched cages lay in average heavier egg s (P<0.05) comparing with hens housed in conventional cages. Other egg quality parameters as egg white height, Haugh units, egg yolk height, egg yolk index, egg shell breaking strength and egg shell thickness are no significantly affected by type of caging. Hen-day egg performance curve at the end of laying period declines more rapidly in conventional cages, the reason shou ld be earlier exhaustion of hens linked with different degree of welfare between observed cage d signs.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://www.cabi.org/Uploads/animal-science/worlds-poultry-science-association/WPSA-italy-2006/10141.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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