Veterinarski arhiv, Vol. 83 No. 2, 2013.
Izvorni znanstveni članak
The effect of the age of Japanese quails on certain egg quality traits and their relationships.
Lukáš Zita
; Department of Animal Husbandry, Faculty of Agrobiology, Food and Natural Resources Czech University of Life Sciences, Prague, Czech Republic
Zdeněk Ledvinka
; Department of Animal Husbandry, Faculty of Agrobiology, Food and Natural Resources Czech University of Life Sciences, Prague, Czech Republic
Ludmila Klesalová
; Department of Animal Husbandry, Faculty of Agrobiology, Food and Natural Resources Czech University of Life Sciences, Prague, Czech Republic
Sažetak
The effect of age on the egg quality traits of Japanese quails (Coturnix coturnix japonica) were investigated. One hundred female quails were used in the study. The quails were placed in wire cages (3 females per cage) and fed a mixture with 11.2 MJ ME and 19.7% of crude protein throughout the experiment. Feed and water were given ad libitum. Eggs were collected on 2 consecutive days during the 4-week period when the quails were from 9 to 49 weeks of age. A total of 2,060 eggs were examined. Egg quality traits were significantly affected by the age of the quails, with the exception of egg shape index and yolk colour. A rapid increase in the egg weight was found at the beginning of laying, the highest weight (13.02 g) was found in the 25th week of age, with a subsequent gradual decrease in egg weight until the end of the laying period at 49 weeks of age. Despite frequent fluctuations, the albumen index, albumen weight, albumen proportion, Haugh units score, eggshell weight and eggshell strength decreased with increasing age, but the yolk proportion, eggshell proportion increased with the quails’ age. The egg weight was positively correlated (P≤0.001) with yolk weight, albumen weight and eggshell weight (0.70, 0.90 and 0.58, respectively). The Haugh unit score was positively correlated with the albumen index (0.94; P≤0.001).
Ključne riječi
Japanese quail; age; yolk; albumen; eggggshell
Hrčak ID:
99851
URI
Datum izdavanja:
28.3.2013.
Posjeta: 2.503 *