Banca de QUALIFICAÇÃO: LUCAS DE SOUZA BARROS

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : LUCAS DE SOUZA BARROS
DATE: 26/06/2026
TIME: 14:00
LOCAL: Universidade Federal de Campina Grande
TITLE:

Effect of supplementation with linseed oil (Linum usitatissimum L.), in free and microencapsulated forms, on the performance and consumption of sheep

KEY WORDS:

Biohydrogenation, linseed oil, protected fat.

PAGES: 42
BIG AREA: Ciências Agrárias
AREA: Zootecnia
SUBÁREA: Nutrição e Alimentação Animal
SPECIALTY: Avaliação de Alimentos para Animais
SUMMARY:

This study evaluated the effects of including linseed oil (Linum usitatissimum L.), both in free

form and microencapsulated in carnauba wax (Copernicia prunifera), on the intake and

performance of sheep. Forty-five intact male Santa Inês sheep, with an average initial weight of

approximately 19.5 kg and about 120 days of age, were used in a completely randomized design

with five treatment types: control diet; 4% and 8% free linseed oil; and 4% and 8% encapsulated

linseed oil. The diets were formulated aiming for an average daily gain of 200 g, with a

forage:concentrate ratio of 40:60. Nutrient intake, weight gain, average daily gain, and feed

efficiency were evaluated. The results showed that the inclusion of 8% free oil reduced dry

matter intake (836 g/day) compared to the treatments with 4% and 8% protected oil, which

showed intake of 1720 and 1899 g/day (P<0.05). Animals in the 8% free oil treatment had lower

weight (27.34 kg) and lower daily gain (0.139 kg/day) compared to the other treatments

(P<0.05). Treatments with microencapsulated oil had higher intake and performance. Thus, the

inclusion of free oil in the diet compromises the rumen environment, reducing nutrient intake

and animal performance. Therefore, the inclusion of microencapsulated linseed oil proved to be

an efficient nutritional strategy, promoting better nutrient utilization and improved productive

performance of confined sheep.

COMMITTEE MEMBERS:
Interno - 1506999 - JOSE FABIO PAULINO DE MOURA
Interno - 1217069 - JOSE MORAIS PEREIRA FILHO
Externo ao Programa - ***.633.704-** - GILDENIA ARAÚJO PEREIRA - UFCG