Banca de DEFESA: JOSÉ HENRIQUE RESENDE BORGES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : JOSÉ HENRIQUE RESENDE BORGES
DATE: 07/12/2021
TIME: 09:00
LOCAL: Web Conferência - Google Meet - meet.google.com/swh-ifoo-hvf.
TITLE:

Fertile eggs disinfection on contamination and embryonic mortality rates and its association with probiotics on broilers` performance.

KEY WORDS:

Embryo diagnosis; Incubation; Embryo mortality; Broiler chicks.

PAGES: 45
BIG AREA: Ciências Agrárias
AREA: Medicina Veterinária
SUMMARY:

Eggs with high levels of contamination can result in considerable losses on the hatchability rate, and consequently generate an increase in production costs. The objective was to evaluate the disinfection system of fertile eggs with the use of calcium oxychloride at 200 ppm, on the contamination and embryo diagnosis of eggs with the association of the use of probiotics in the post-hatching on the zootechnical performance of chickens from heavy breeders . After hatching, 4,132 chicks were divided into two groups, where the first received a probiotic spray along with the Chicken Infectious Bronchitis vaccine and the second received only the vaccine spray. The design used was the 2x2 factorial, forming four groups: T1, T2 T3 and T4. The second stage was carried out in the aviary where the zootechnical parameters (mortality, average weight (PM), and feed conversion (CA) at 7, 21, 28 and 42 days of age of the chickens were evaluated. The total bacteria count was not influenced by the disinfection system.Bird mortality was not influenced, regardless of the disinfection system or use of probiotic in the evaluated phases (P>0.05) The initial weight of birds was higher in the system with the use of paraformaldehyde and conversion better feed at 7 days with the combined use of disinfection with calcium oxychloride at 200 ppm of eggs and probiotic via spray for the chicks (P<0.05) The average weight of broilers at 7, 21 and 42 days of age was dependent on both the disinfection system and the administration of the probiotic, as well as feed conversion at 28 and 42 days of age. Therefore, the replacement of paraformaldehyde by calcium oxychloride 200 ppm as a disinfection system for fertile eggs may be promising through and the administration of post-hatch probiotic to broiler chickens.

BANKING MEMBERS:
Presidente - 2277465 - FABIANA MOREIRA
Externo à Instituição - FERNANDO PILOTTO - UPF
Externo à Instituição - CÉLSO PILATI - EDESC