Akademik Veri Yönetim Sistemi
2023 International Poultry Scientific Forum, Georgia, Amerika Birleşik Devletleri, 20 - 24 Ocak 2023, ss.69, (Özet Bildiri)
The effects of storage time (0, 7, 14, 21, and 28 day)
at room temperature and the rearing system (enriched cage and cage-free) on the
quality of eggs from layers (Lohmann Brown-Classic) at 30-wk of age were
studied. A total of 250 eggs (125 eggs per rearing system) were collected on
the first day of 30-wk of age and placed on plastic egg trays. Eggs were
numbered, weighed, and assigned to each experimental storage time for each
rearing system (25 eggs per storage time for each rearing system). The design
of the experiment was completely randomized with a 2 x 5 factorial arrangement.
All data were analyzed using the GLM procedure in SPSS software. Egg weight,
yolk height, yolk index, haugh unit, albumen height, and eggshell strength
decreased linearly as egg storage time increased (P<0.05). On the contrary,
albumen pH, yolk diameter, albumen length, albumen width, and air cell diameter
increased linearly as egg storage time increased (P<0.001). Albumen height,
yolk index, yolk height, and haugh unit of eggs from the enriched cage system were
higher than that of the cage-free system (P<0.05). Eggs from the cage-free
system had higher albumen length than that of the enriched cage system
(P<0.05). An interaction (P<0.01) was observed between storage time and the
rearing system led to a higher decrease in albumen height of eggs from the enriched
cage system (64%) when compared to those from the cage-free system (53%) at the
end of 28-day storage time. An interaction (P<0.01) was observed between
storage time and rearing system led to a higher increase in albumen width of
eggs from the enriched cage system (45%) when compared to those from the cage-free
system (25%) at the end of the 28-day storage time. In conclusion, fresh eggs
(0-day) from the enriched cage system had better interior quality (higher
albumen height and haugh unit, higher yolk height and index, and lower albumen
length). On the other hand, the interior quality of eggs from the cage-free
system remained superior to those from the enriched cages during 28-day room
temperature storage.