Back to Search Start Over

Effects of Ascorbic Acid Injection in Incubated Eggs Submitted to Heat Stress on Incubation Parameters and Chick Quality

Authors :
S Sgavioli
JB Matos Júnior
LL Borges
MFFM Praes
VS Morita
GL Zanirato
RG Garcia
IC Boleli
Source :
Brazilian Journal of Poultry Science, Vol 17, Iss 2, Pp 181-189 (2015)
Publication Year :
2015
Publisher :
Fundação APINCO de Ciência e Tecnologia Avícolas, 2015.

Abstract

Dose-dependent positive effects on hatchability and hatchling weight have been attributed to ascorbic acid (AA) when eggs were submitted or not to intermittent heat stress during incubation. Fertile breeder (Cobb(r)) eggs were used to determine if the pre-incubation injection of AA in ovo affects the incubation and hatchling quality of egg incubated under thermoneutral or intermittent heat stress conditions. Eggs were not injected or injected with 0, 2,4, or 6% AA/100µL water and incubated at continuous thermoneutral (37.5ºC) or hot (39.0ºC) temperature. Eggshell temperature (EST) increased in the second half of the incubation period in all experimental groups. The EST of non-injected eggs and of those injected with water was higher when incubated at 39°C than at 37.5°C, but EST was not different among eggs injected with AA. Egg mass loss and eggshell conductance were higher in the eggs incubated at 39°C than at 37.5°C.Hatchability was lower in the eggs injected with AA. Liver and yolk sac weights were higher, whereas heart and liver weights were lower in hatchlings from eggs incubated at 39°C; however, hatchling weight was not affected by incubation temperature. The results showed that AA doses affected egg conductive heat loss and hatchability, and that they did not minimize the effects of high incubation temperature on liver and heart development.

Details

Language :
English
ISSN :
18069061 and 1516635x
Volume :
17
Issue :
2
Database :
Directory of Open Access Journals
Journal :
Brazilian Journal of Poultry Science
Publication Type :
Academic Journal
Accession number :
edsdoj.32ec146bb39c4c84ab461f38319d0392
Document Type :
article
Full Text :
https://doi.org/10.1590/1516-635x1702181-190