Banca de DEFESA: MARIA VICTORIA VIEGAS DE MORAIS TEIXEIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : MARIA VICTORIA VIEGAS DE MORAIS TEIXEIRA
DATE: 27/03/2026
TIME: 08:00
LOCAL: Departamento de Zootecnia
TITLE:

Wheat bran, fresh forage cactus, and forage cactus bran as alternatives to corn meal in concentrate for lactating goats.

KEY WORDS:

dairy goat production; performance; nutrient intake; milk composition.

PAGES: 34
BIG AREA: Ciências Agrárias
AREA: Zootecnia
SUBÁREA: Nutrição e Alimentação Animal
SPECIALTY: Avaliação de Alimentos para Animais
SUMMARY:

The objective of this study was to evaluate the effect of four energy sources in the concentrate for lactating goats on nutrient intake and digestibility, ingestive behavior, milk production and composition, and the fatty acid profile of milk fat. The experiment was conducted at the Small Ruminant Sector of the Department of Animal Science at the Federal Rural University of Pernambuco (UFRPE), located in Recife, Brazil. Eight lactating Saanen goats with an average body weight of 55 kg and an average milk production of 1.5 kg/day were used. The animals were distributed in two simultaneous 4 × 4 Latin squares according to the energy source: corn meal (CM), wheat bran (WB), fresh forage cactus (FC), and forage cactus meal (CMF). Each experimental period lasted 21 days, including 14 days for adaptation and seven days for data and sample collection. Data were subjected to analysis of variance using the MIXED procedure of the Statistical Analysis System (SAS, 2009), and means were compared using Dunnett's test (P < 0.05). In general, the treatment with forage cactus meal resulted in the lowest nutrient intake, particularly crude protein (0.18 kg/day) and total digestible nutrients (0.82 kg/day). Nutrient digestibility was not affected by the evaluated energy sources. Rumination time was reduced, resulting in increased idle time for animals fed forage cactus meal (356.5 and 812.5 minutes/day). Milk yield, both uncorrected and corrected, was lower for the forage cactus meal treatment compared with the corn meal and wheat bran treatments (1.17 and 1.22 kg/day). Only lactose content differed among treatments, with lower values observed in the forage cactus meal treatment. Regarding the milk fatty acid profile, the use of fresh forage cactus and forage cactus meal generally resulted in more favorable outcomes, particularly with respect to obtaining a lipid profile potentially more beneficial for human health. It was concluded that forage cactus meal is not recommended as an energy source in the concentrate for lactating Saanen goats, as its inclusion resulted in lower productive performance compared with the other evaluated energy sources. However, both fresh forage cactus and forage cactus meal promoted changes in the fatty acid profile of milk fat, resulting in a lipid profile potentially more favorable for human consumption.

COMMITTEE MEMBERS:
Presidente - MARCELO DE ANDRADE FERREIRA
Interno - JOAO PAULO ISMERIO DOS SANTOS MONNERAT
Externa ao Programa - 2234529 - LUCIANA FELIZARDO PEREIRA SOARES - UFRPEExterno à Instituição - ADRIANO HENRIQUE DO NASCIMENTO RANGEL - UFRN
Externa à Instituição - STELA ANTAS URBANO - UFRN