Effect of In Ovo Ascorbic Acid Injection and Thermal Manipulation During Incubation on Intestine Morphology of Broilers Reared under Cold and Heat Stress

Autor(es)

S Sgavioli ^[1] ; TI Vicentini ^[2] ; CHF Domingues ^[3] ; ET Santos ^[4] ; TCO de Quadros ^[5] ; RG Garcia ^[6] ; IA Naas ^[7] ; IC Boleli ^[8]

Afiliação do(s) autor(es)

^[1] Brazil University - Brasil

^[2] São Paulo State University. Department of Morphology and Animal Physiology - Brasil

^[3] Federal University of Grande Dourados. College of Agricultural Sciences - Brasil

^[4] São Paulo State University. Department of Morphology and Animal Physiology - Brasil

^[5] São Paulo State University. Department of Morphology and Animal Physiology - Brasil

^[6] Federal University of Grande Dourados. College of Administration, Accounting and Economics Science - Brasil

^[7] Federal University of Grande Dourados. College of Administration, Accounting and Economics Science - Brasil

^[8] São Paulo State University. Department of Morphology and Animal Physiology - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Journal of Poultry Science; v. 24, n. 4 2022-08-29.

Resumo

ABSTRACT It was investigated if pre-incubation ascorbic acid (AA) injection in fertile eggs incubated at high temperature impacts the performance, the yield of carcass and parts, and the intestine morphology of broilers reared under heat stress. Three thousand Cobb® fertile broiler eggs were randomly distributed according to weight into three incubations treatments (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 thermoneutral, cold, and hot house temperatures. Broilers reared under hot temperature presented lower feed intake and weight gain than the broilers of the different rearing temperatures. Egg incubation at 39.0 ºC and 39.0 ºC + AA reduced broiler viability. Carcass and cut yields were not influenced by incubation and rearing procedures. Duodenal goblet cell count was lower in broilers from eggs of the treatment 39ºC + AA than in broilers from the other incubation treatments and in broiler rearing in hot temperature. In the jejunum, the goblet cell counts were higher in broilers that were reared under hot than thermoneutral temperatures. The incubation treatment of 39 ºC+AA increased the goblet cell counts in the ileum of broilers reared under cold temperatures. Rearing temperature influenced the duodenal villi counts, which were lower under cold rearing conditions than in the two other rearing temperatures. The results showed that egg incubation at 39°C, independently of ascorbic acid injection, did not produce an effective epigenetic heat adaptation in broilers. (AU)

• Processo FAPESP: 10/15280-0 - Efeito da injeção de ácido acórbico e do estresse calórico na incubação sobre o desempenho e características fisiológicas e comportamentais de frangos de corte criados sob diferentes temperaturas
• Beneficiário: Isabel Cristina Boleli
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 10/01923-7 - Efeito da injeção de ácido ascórbico e estresse calórico na incubação sobre o desempenho e características fisiológicas e comportamentais de frangos de corte criados sob diferentes temperaturas
• Beneficiário: Sarah Sgavioli
• Modalidade de apoio: Bolsas no Brasil - Doutorado