Banca de DEFESA: GABRIELA COELHO DOS SANTOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : GABRIELA COELHO DOS SANTOS
DATE: 31/03/2023
TIME: 08:30
LOCAL: INSTITUTO DE ZOOTECNIA
TITLE:

Orange Essential Oil (Citrus sinensis) in the Diets for Broilers: Perfomance, Organs Biometrics, Bone Characteristics and Digestibility of Nutrients

KEY WORDS:

Phytogenic, Limonene, Poultry nutrition, Metabolism

 

PAGES: 58
BIG AREA: Ciências Agrárias
AREA: Zootecnia
SUMMARY:

ABSTRACT

The objective was to evaluate the zootechnical performance, the biometry of organs and bones and the digestibility of nutrients in diets containing essential oil of Pêra orange (Citrus sinensis L.) for broiler. The experiment was carried out in a completely randomized design - DIC, with six treatments (0; 50; 100; 150, 200 and 250 mg of orange essential oil/kg of feed), eight repetitions with six birds each (n = 288). Feed intake, weight gain, feed conversion and bird viability were evaluated, in the period from one to 21 days of age. Nutrient digestibility was determined by total collection of bird excreta. Excreta and diets were analyzed to determine the metabolizability coefficients for dry matter (DM), crude protein (CP), energy (EB), ether extract (EE) and mineral matter (MM). At 21 days of age, two birds from each replicate were euthanized by cervical dislocation (n = 96), in compliance with the ethical principles of experimental animals. The organs of the digestive system (liver, gizzard, pancreas and intestine) and heart were submitted to biometry and the bones to metric variables (in natura weights, length and diameters), bone density (Seedor Index) and total mineral composition (ashes). The addition of pera orange essential oil (Citrus sinensis L.) did not influence performance parameters and organ biometry. The bone characteristics were influenced by the phytogenic additive, with an increase in the vertical and horizontal diameter of the tibias and horizontal diameter of the femurs, and the inclusion of higher values of orange essential oil resulted in a reduction in the breaking strength of the tibia and in the % of ash on the femurs. The digestibility of nutrients in the diets were positively influenced by the inclusion of 250 mg of pera orange essential oil/kg of ration.

 

 

 

COMMITTEE MEMBERS:
Presidente - 387738 - CRISTINA AMORIM RIBEIRO DE LIMA
Externo à Instituição - FELIPE DILELIS DE RESENDE SOUSA - OUTRO
Externa à Instituição - VERONICA DA SILVA CARDOSO - UFRJ