Faculty of Veterinary Medicine University of Zagreb
Abstract
In this research study, hatchability results and some internal egg quality characteristics of 0, 2, 3, 5, 7 and 9 d stored eggs in RIR were examined. It was determined that the effect of storage time on hatchability, hatchability of fertile eggs, embryonic mortality, chick weight, albumen weight, yolk weight, albumen index, yolk index and Haugh unit was significant (P<0.05). There was no positive or negative effect of storage time on the fertility rates, but there was a negative effect of storage time on egg weight, hatchability, embryonic development and chick weight on d 3 (P<0.05). It was determined that prolonged storage time caused a decrease in the albumen weight, yolk weight, albumen index, yolk index and Haugh unit value of Rhode Island Red eggs. Rhode Island Red eggs should not be stored more than 3 d.U radu su istraženi valivost i karakteristike jaja pasmine Rhode Island Red u uvjetima različite duljine skladištenja od 0, 2, 3, 5, 7 i 9 dana. Duljina skladištenja statistički je značajno (P<0,05) utjecala na valivost, valivost oplođenih jaja, smrtnost embrija, masu pilića, masu bjelanjka, masu žumanjka, indeks bjelanjka, indeks žumanjka te na vrijednost Haughove jedinice. Nije utvrđen ni pozitivan ni negativan učinak duljine skladištenja na stopu plodnosti, ali je duljina skladištenja od 3 dana značajno utjecala (P<0,05) na masu jaja, valivost, razvoj embrija i masu pilića. Ustanovljeno je da u jaja Rhode Island Red kokoši produženo vrijeme skladištenja dovodi do smanjenja mase bjelanjka, mase žumanjka, indeksa bjelanjka, indeksa žumanjka i vrijednost Haughove jedinice. Zaključeno je da jaja kokoši Rhode Island Red ne bi trebalo skladištiti dulje od 3 dana
