Effects of thermal stress and ascorbic acid injection in the incubation on growth, and physiological and behavioral responses of broilers reared under cold, thermoneutral and heat temperature

• Grant number: 10/15280-0
• Support type: Regular Research Grants
• Duration: November 01, 2010 - October 31, 2013
• Field of knowledge: Agronomical Sciences - Animal Husbandry - Animal Production
• Principal researcher: Isabel Cristina Boleli
• Grantee: Isabel Cristina Boleli
• Home Institution: Faculdade de Ciências Agrárias e Veterinárias (FCAV). Universidade Estadual Paulista (UNESP). Campus de Jaboticabal. Jaboticabal , SP, Brazil

Abstract

The development of management practice to reduce thermal stress-related decreases in performance of broiler chicken is very important of the animal production and economical view point. This study will be conduced to determine if thermal stress and ascorbic acid injection during egg incubation (1) increase resistance to low and high environmental temperature and (2) alter thermal-stress changes in the performance, physiological and behavioral responses, and carcass characteristics of broilers. Il will have two parts. In the first Part, eggs will be injected or not with different levels of ascorbic acid and incubated under thermoneutral temperature (37,5ºC). From hatching to 42 days of age, broilers will be reared under thermal stress. In the second Part, eggs will be injected or not with different levels of ascorbic acid and incubated under thermal stress (cold, thermo neutral and heat temperature). From hatching to 42 days of age, broilers will be reared under thermal stress. In the both Parts, an experimental design containing five treatments (eggs not injected, eggs injected with water, eggs injected with 3, 6, and 9mg of ascorbic acid per egg) will be utilized in the incubation phases. In the rearing phases, a 3 (birds from eggs of 3 incubation treatments: eggs not injected, eggs injected with water, and eggs injected with ascorbic acid level that to improve hatchability and newly-hatched chick quality) x 4 (four cold, thermo neutral, heat and cyclical heat temperatures) factorial design will be used, with six replicates of 30 eggs each. All the data will be analyzed using procedure provided in SAS software. All the incubation data will be subjected to polynomial regression, while the data of environmental temperature will be analyzed by Tukey`s test at 0.05%. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

SGAVIOLI, S.; DE ALMEIDA, V. R.; MATOS JUNIOR, J. B.; ZANIRATO, G. L.; BORGES, L. L.; BOLELI, I. C. In ovo injection of ascorbic acid and higher incubation temperature modulate blood parameters in response to heat exposure in broilers. BRITISH POULTRY SCIENCE, v. 60, n. 3, p. 279-287, MAY 4 2019. Web of Science Citations: 1.

FERREIRA, I. B.; MATOS JUNIOR, J. B.; SGAVIOLI, S.; VICENTINI, T. I.; MORITA, V. S.; BOLELI, I. C. Vitamin C prevents the effects of high rearing temperatures on the quality of broiler thigh meat. POULTRY SCIENCE, v. 94, n. 5, p. 841-851, MAY 2015. Web of Science Citations: 7.

SGAVIOLI, S.; MATOS JUNIOR, J. B.; BORGES, L. L.; PRAES, M. F. F. M.; MORITA, V. S.; ZANIRATO, G. L.; GARCIA, R. G.; BOLELI, I. C. Effects of Ascorbic Acid Injection in Incubated Eggs Submitted to Heat Stress on Incubation Parameters and Chick Quality. Brazilian Journal of Poultry Science, v. 17, n. 2, p. 181-189, APR-JUN 2015. Web of Science Citations: 9.