TABLE QUALITY OF LAYER EGGS FROM VARIOUS PRODUCTION SYSTEMS
ZLATICA PAVLOVSKI;, ZDENKA ŠKRBIĆ;, MILOŠ LUKIĆ
Abstract: The quality of table eggs obtained from Hy Line hybrid layers reared in battery system and native population of Naked-neck hens reared in extensive system, was studied. The external properties (egg mass, shape index, cleanliness and eggshell colour), internal properties (egg-white colour, haugh units, egg yolk
colour, egg-white/yolk ratio), properties of egg and egg shell quality (mass, thickness, defomration and breaking force) were observed. Òhe trial was carried out on the Experimental farm of the Institute and it lasted 28 weeks, i.e. seven 4-week long study periods. The results show that Hybrid Hy Line in battery system had eggs of better quality. Its eggs had higher average mass, better egg-white quality and thicker and firmer eggshell. Naked-neck native hens reared in extnesive system with limited range gave eggs with lower shape index (more pointy eggs), significantly lighter colour of egg shell (2.25; 3.37) and significantly more intensive yolk colour (13.03; 11.52).
colour, egg-white/yolk ratio), properties of egg and egg shell quality (mass, thickness, defomration and breaking force) were observed. Òhe trial was carried out on the Experimental farm of the Institute and it lasted 28 weeks, i.e. seven 4-week long study periods. The results show that Hybrid Hy Line in battery system had eggs of better quality. Its eggs had higher average mass, better egg-white quality and thicker and firmer eggshell. Naked-neck native hens reared in extnesive system with limited range gave eggs with lower shape index (more pointy eggs), significantly lighter colour of egg shell (2.25; 3.37) and significantly more intensive yolk colour (13.03; 11.52).
Keywords: layer hen; production system; quality of eggs
Date published: 2023-01-24
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