FOOD. Science. Technology. Quality

Food. SCIENCE. Technology. Quality

Food. Science. TECHNOLOGY. Quality

Food. Science. Technology. QUALITY

Authors

KATARZYNA POŁTOWICZ, JOLANTA CALIK, STANISŁAW WĘŻYK

Title

Patterns in white-shell table egg quality traits in dependence on age and housing system of Hy-Line White layers

Abstract

The aim of this study was to determine the effect of age and housing system of laying hens on the quality of table eggs. The studies involved white shell eggs from commercial layers Hy-Line kept on litter or caged. Egg weight [g], shell colour [%], albumen height [mm], Haugh units, La Roche yolk colour intensity [pts.], shell weight [g], thickness [μm], density [mg/cm2], strength [kG], deformation at 1 kG and 2 kG [μm] and [%] and maximum deformation at shell breaking were determined. The studies were carried out at 19, 26, 32, 46 and 56 weeks of age. It is concluded from the results that many egg quality and shell traits change with age of the hens. As the laying period went on, the weight of egg, yolk and shell increased and albumen quality and shell strength decreased. Eggs from caged hens were characterized by slightly higher weight and greater albumen height and Haugh units, although the influence of the housing system on the experimental traits was not significant.

Keywords

egg quality, laying hens, age, housing system

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