Effect of In-Ovo Ascorbic Acid Injection on the Bone Development of Broiler Chickens Submitted to Heat Stress During Incubation and Rearing

Abstract This experiment was conducted to evaluate the effect of in-ovo ascorbic acid (AA) injection on the bone development of broilers submitted to heat stress during incubation and rearing. One thousand (1,000) Cobb(r)fertile broiler eggs were randomly distributed according to the weight into fiv...

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Bibliographic Details
Published in:	Brazilian Journal of Poultry Science Vol. 18; no. 1; pp. 153 - 162
Main Authors:	Sgavioli, S, Domingues, CHF, Santos, ET, Quadros, TCO de, Borges, LL, Garcia, RG, Louzada, MJQL, Boleli, IC
Format:	Journal Article
Language:	English
Published:	Fundação APINCO de Ciência e Tecnologia Avícolas 01-03-2016
Subjects:	Ash femoral bone strength mineral density tibia vitamin C
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Summary:	Abstract This experiment was conducted to evaluate the effect of in-ovo ascorbic acid (AA) injection on the bone development of broilers submitted to heat stress during incubation and rearing. One thousand (1,000) Cobb(r)fertile broiler eggs were randomly distributed according to the weight into five incubators, with 200 eggs per incubator. The incubation treatments were: eggs not injected with AA and incubated at 37.5°C; eggs not injected with AA and incubated at 39°C; and eggs injected with 6 µg AA/100 µL water prior to incubation and incubated at 39ºC. The hatched birds were reared at three different house temperatures: cold, thermoneutral, or and hot. The high incubation temperature negatively influenced broilers' bone characteristics. The femur of the birds hatched from eggs incubated at 39°C and injected with AA presented lower shaft mineral density, lower maximum force and lower elongation at maximum force. Their tibia presented reduced mineral density at the proximal and distal epiphysis. In-ovo AA injection of eggs incubated at high temperature did not minimize the negative effects of high rearing temperature on the performance andbone development of broiler chickens reared until 42 days of age.
ISSN:	1516-635X 1806-9061 1516-635X
DOI:	10.1590/18069061-2015-0075