The Influence of Strain and Age on Some Egg Quality Parameters of Commercial Laying Hens

Kocevski, D and Nikolova, N and Kuzelov, Aco (2011) The Influence of Strain and Age on Some Egg Quality Parameters of Commercial Laying Hens. In: Biotechnology in Animal Husbandry.

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Abstract

The experiment was conducted to evaluate the influence of
strain and age on some egg quality parameters (egg weight and egg shell strength)
of commercial laying hens. Layers of lines ISA Brown and DeKalb White were
examined in period of nine months. Both lines were at same age (28 weeks) and
were confined in common facility in battery cages. Laying hens were reared and
fed according to standard breeding technology. Once a month 25 eggs of each line
were taken to be examined for eggshell strength and egg weight, or in other words,
total 450 table eggs were tested. Analises were done in Laboratory for testing egg
quality by gaudges Egg Multi Tester EMT 5200 and Egg shell Gauge
(Robotmation Co. Ltd., Tokyo, Japan) which have computerised equipment to
examine quality and physical characteristics of eggs. Statistic analyses on results
were done by computer sub-programme ANOVA and Fisher's LSD test to
determine the level of statistical significant difference between examined factors.
Egg weight was under significant impact of age (P ≤ 0,05), but not under the
influence of strain, although eggs of ISA Brown line were insignificantly heavier
than eggs of DeKalb White line. Eggs were heaviest at layers with older age, while
they were lightest at younger birds. The results have shown significant differences
(P ≤ 0,05) in eggshell strength compared to line influence (genotype) and months
of age. Eggs from ISA Brown laying hens had much better and eggshell strength
than those eggs from DeKalb White. Correlations between eggshell strength and
egg weight were with significant (Р < 0,05) negative value, which indicating that
with increasing egg weight decreases of eggshell strength.

Item Type:	Conference or Workshop Item (Paper)
Subjects:	Agricultural Sciences > Other agricultural sciences
Divisions:	Faculty of Agriculture
Depositing User:	Aco Kuzelov
Date Deposited:	14 Nov 2012 14:13
Last Modified:	19 Jun 2013 07:55
URI:	https://eprints.ugd.edu.mk/id/eprint/854

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