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Authors
Abstract(s)
Neste trabalho testámos o efeito da suplementação do alimento para vitelos
em acabamento com óleo de soja e vitamina E sobre parâmetros produtivos
e qualidade da carne. Utilizamos 54 vitelos de raça Holstein-Frísia, machos
castrados com 6 meses de idade, distribuídos aleatoriamente por três
tratamentos (um parque por tratamento com três réplicas), alimentados
com alimento composto e palha ad libitum, durante 60 dias antes do abate.
O alimento composto incluiu 4,7 % de óleo de palma saponificado, 4% de
óleo de soja e 4% óleo de soja + 50mg/kg de Vit. E. Os alimentos foram
formulados para serem isoenergéticos e isoproteicos.
Os tratamentos óleo de Soja e óleo de Soja + Vit E apresentaram um ganho
médio diário mais elevado (1,49 e 1,53 kg/dia frente a 1,35 para óleo de
palma saponificado).
A carne dos animais do tratamento óleo de Soja + Vit E apresentou maior
percentagem de ácidos gordos 18:1trans (4,62 vs. 3,58 e 3,25 mg/100g
carne, para óleo de palma saponificado e óleo soja), de 18:3 (0,24 frente a
0,19 e 0,22 para óleo de palma saponificado e óleo de soja). Nenhum dos
tratamentos influenciou a força de corte. O painel de provadores não
detetou off-flavours.
O óleo de soja + Vit E é uma alternativa viável na alimentação vitelos em
período de acabamento contribuindo para um maior GMD frente ao
alimento OPS. A associação de óleo de soja e vitamina E influencia
positivamente a cor da carne, contribuindo para uma carne mais clara e
brilhante. A maturação é o fator determinante para diminuir a força de corte
da carne.
Num segundo ensaio também com 54 vitelos testou-se o efeito de
concentrações crescentes de Vit E. Suplementação com 4% de óleo de
soja + 50mg/kg de Vit. E, 4% de óleo de soja + 100mg/kg de Vit. E e 4% de
óleo de soja + 200mg/kg de Vit. E. Os resultados não mostraram qualquer
efeito nos parâmetros produtivos ou na qualidade de carne.
ABSTRACT - In this work we tested the effect of feed supplementation with soybean oil and vitamin E for finishing calves on production parameters and meat quality. We used 54 Holstein-Friesian calves, castrated males with 6 months of age, randomly distributed into three treatments (one pen per treatment with three replicates), fed with compound feed and straw ad libitum, for 60 days before slaughter. The compound feed included 4,7 % saponified palm oil, 4% soy oil and soy oil + 50mg / kg of Vit. E. Feeds had been formulated to be isoenergetic and isoproteic. The soy oil and soy oil + Vit. E treatments showed a higher average daily gain (1.49 and 1.53 kg/day compared to 1.35 for saponified palm oil). The meat of the animals in the soy oil + Vit. E treatment showed a higher percentage of 18:1 trans fatty acids (4.62 vs 3.58 and 3.25 mg/100g meat for saponified palm oil and soy oil), of 18:3 (0.24 compared to 0.19 and 0, 22 for saponified palm oil and soy oil). None of the treatments influenced the Shear force. The taster’s panel did not detect off-flavours. Soy oil + vit E is a viable alternative for feeding calves in the finishing period, contributing to a greater GMD vs control feed. The association of soy oil and vitamin E positively influences the colour of the meat, contributing to a lighter and brighter meat. Ageing is the determining factor to decrease the meat's shear force. In a second trial also with 54 calves, the effect of increasing concentrations of Vit E was tested. Supplementation with 4% soy oil + 50 mg/kg of Vit. E, 4% soy oil + 100 mg/kg of Vit. E and 4% soy oil + 200 mg/kg of Vit. E. The results showed no effect on production parameters or meat quality.
ABSTRACT - In this work we tested the effect of feed supplementation with soybean oil and vitamin E for finishing calves on production parameters and meat quality. We used 54 Holstein-Friesian calves, castrated males with 6 months of age, randomly distributed into three treatments (one pen per treatment with three replicates), fed with compound feed and straw ad libitum, for 60 days before slaughter. The compound feed included 4,7 % saponified palm oil, 4% soy oil and soy oil + 50mg / kg of Vit. E. Feeds had been formulated to be isoenergetic and isoproteic. The soy oil and soy oil + Vit. E treatments showed a higher average daily gain (1.49 and 1.53 kg/day compared to 1.35 for saponified palm oil). The meat of the animals in the soy oil + Vit. E treatment showed a higher percentage of 18:1 trans fatty acids (4.62 vs 3.58 and 3.25 mg/100g meat for saponified palm oil and soy oil), of 18:3 (0.24 compared to 0.19 and 0, 22 for saponified palm oil and soy oil). None of the treatments influenced the Shear force. The taster’s panel did not detect off-flavours. Soy oil + vit E is a viable alternative for feeding calves in the finishing period, contributing to a greater GMD vs control feed. The association of soy oil and vitamin E positively influences the colour of the meat, contributing to a lighter and brighter meat. Ageing is the determining factor to decrease the meat's shear force. In a second trial also with 54 calves, the effect of increasing concentrations of Vit E was tested. Supplementation with 4% soy oil + 50 mg/kg of Vit. E, 4% soy oil + 100 mg/kg of Vit. E and 4% soy oil + 200 mg/kg of Vit. E. The results showed no effect on production parameters or meat quality.
Description
Tese de Doutoramento em Ciências Veterinárias na especialidade de Produção Animal
Keywords
Vitelos Holstein-Frísio óleo de palma saponificado óleo de soja vitamina E Holstein-Friesian calves saponified palm oil soy oil vitamin E
Pedagogical Context
Citation
Silva RPF. 2021. Óleo de soja e vitamina E : efeitos nos parâmetros produtivos e na qualidade da carne de vitelos de raça Holstein-Frísia [Tese de Doutoramento]. Lisboa: FMV-Universidade de Lisboa.
Publisher
Universidade de Lisboa, Faculdade de Medicina Veterinária
