dissertação
Óleo de fritura residual na alimentação de tourinhos Rednorte terminados em confinamento.
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UNIVERSIDADE FEDERAL DE LAVRAS
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Este trabalho foi realizado com o objetivo de avaliar o efeito da inclusão do óleo de fritura residual sobre o consumo (CMS), desempenho (GMD) e características de carcaça de Tourinhos Rednorte terminados em confinamento. O experimento foi conduzido no Setor de Bovinocultura de Corte, do Departamento de Zootecnia da Universidade Federal de Lavras. Utilizaram-se 27 novilhos Rednorte com peso vivo inicial médio de 318 ± 31 kg submetidos a três dietas: (SLA) sem lipídeo adicional com 3,5% de extrato etéreo (EE); (OS) óleo de soja comercial e (OF) óleo de fritura residual, 7% de EE na base da matéria seca. A duração do experimento foi de 112 dias, composto por 28 dias de adaptação e 84 dias experimentais, divididos em três períodos de 28 dias. Os animais receberam ração ad libitum, com relação volumoso: concentrado 40:60. As pesagens foram realizadas ao final de cada período, após jejum alimentar e hídrico de 16 horas. Ao final dos 84 dias foram tomadas as medidas de área de olho de lombo (AOL), espessura de gordura subcutânea (EGS) e espessura de gordura na garupa (P8) por meio da ultrassonografia. O CMS foi mensurado por meio de pesagem da dieta oferecida e a pesagem das sobras no dia seguinte, obtendo-se o consumo do lote e o consumo médio por animal do lote. Houve diferença entre os tratamentos (P<0,05) quanto ao CMS que foi de 10,78; 9,88 e 9,18 kg/dia para os tratamentos SLA, OS e OF, respectivamente. Quando o CMS foi comparado em outras unidades, %PV e g/kg PV0,75 também houve diferença (P<0,05). Os valores de ganho médio diário (GMD) não foram diferentes (P>0,05) entre os tratamentos, sendo os valores encontrados 1,69; 1,78 e 1,67 kg/dia para SLA, OS e OF, respectivamente. Para as características de carcaça não foram encontradas diferenças (P>0,05) para AOL. O rendimento de carcaça foi superior (P<0,05) para o tratamento SLA em relação aos tratamentos com adição de óleo. Para EGS e P8 não foram encontradas diferenças entre os tratamentos (P>0,05). A adição do óleo de fritura residual à dieta reduziu o CMS sem alterar o GMD, resultando em melhoria na eficiência alimentar e redução nos custos com alimentação.
The experiment was done to evaluate the effects of the addition of soybean oil on dry matter intake average daily live weight gain, and carcass characteristics of rednorte bulls fattened in a feedlot. The trial was conducted at the beef cattle Sector of the Animal Science Department of Universidade Federal de Lavras, in the State of MG, Brazil. It was utilized 27 uncastrated Rednorte steers weighing 318 ± 31 kg at the beginning. The animals were submitted to three diet treatments, as follow: with no lipid addition, with 3.5% of stereo extract added - commercial soybean oil, and 7% of used soybean oil, oil that was used to fry food. The experimental lasted 112 days, where the first 28 days were of an adaptation period and the remaining time, the experimental period. The 84 day period was divided into three stages of 28 days each. The animals were ad libitum fed and the relationship between the roughage and concentrate was 40:60% on the bases of dry matter. The animals´ weighing was undertaken at the end of each 28 day period, after 16 hours of water and food suppression. At the end of the 84 day period it was measured the following parameters: Longissimus muscle area (LMA), back fat thickness, and fat thickness over Bíceps femoris with the use of ultrasound. Dry matter consumption was measured weighing the diet offered and left over. Through doing this procedure it was possible to estimate the intake for the group of animals, and the average intake for each bull. There were differences among treatments (P>0.05) for dry matter intake. The dry matter intake for the treatment without the inclusion of soybean oil was 10.78; the one with the commercial soybean oil it was 9.88, and for treatment with the addition of used soybean oils it was 9.18 kg of dry matter per day. By calculating dry matter and comparing it in another unit, such as % of live weight and g/kg of metabolic weight it was also observed a difference due to treatment.For daily live weight gain there was no difference due to treatment or diet and the values were 1.69; 1.78; and 1.67 kg/day for the treatments without the addition of oil, with commercial soybean oil, and residual soybean oil, respectively. For carcass characteristics no differences were found (P>0.05) for (LMA). The carcass yield was greater for the treatment with the addition of oil of any kind in relation to the one without oil, treatment control. Like wise there were no differences due to treatments for oil thickness and oil thickness at the P8 (P>0.05). The use of residual or used oil in the steers´ diet decreased dry matter intake but did not modify daily live weight gain, resulting in a bather food efficiency and food cost.
The experiment was done to evaluate the effects of the addition of soybean oil on dry matter intake average daily live weight gain, and carcass characteristics of rednorte bulls fattened in a feedlot. The trial was conducted at the beef cattle Sector of the Animal Science Department of Universidade Federal de Lavras, in the State of MG, Brazil. It was utilized 27 uncastrated Rednorte steers weighing 318 ± 31 kg at the beginning. The animals were submitted to three diet treatments, as follow: with no lipid addition, with 3.5% of stereo extract added - commercial soybean oil, and 7% of used soybean oil, oil that was used to fry food. The experimental lasted 112 days, where the first 28 days were of an adaptation period and the remaining time, the experimental period. The 84 day period was divided into three stages of 28 days each. The animals were ad libitum fed and the relationship between the roughage and concentrate was 40:60% on the bases of dry matter. The animals´ weighing was undertaken at the end of each 28 day period, after 16 hours of water and food suppression. At the end of the 84 day period it was measured the following parameters: Longissimus muscle area (LMA), back fat thickness, and fat thickness over Bíceps femoris with the use of ultrasound. Dry matter consumption was measured weighing the diet offered and left over. Through doing this procedure it was possible to estimate the intake for the group of animals, and the average intake for each bull. There were differences among treatments (P>0.05) for dry matter intake. The dry matter intake for the treatment without the inclusion of soybean oil was 10.78; the one with the commercial soybean oil it was 9.88, and for treatment with the addition of used soybean oils it was 9.18 kg of dry matter per day. By calculating dry matter and comparing it in another unit, such as % of live weight and g/kg of metabolic weight it was also observed a difference due to treatment.For daily live weight gain there was no difference due to treatment or diet and the values were 1.69; 1.78; and 1.67 kg/day for the treatments without the addition of oil, with commercial soybean oil, and residual soybean oil, respectively. For carcass characteristics no differences were found (P>0.05) for (LMA). The carcass yield was greater for the treatment with the addition of oil of any kind in relation to the one without oil, treatment control. Like wise there were no differences due to treatments for oil thickness and oil thickness at the P8 (P>0.05). The use of residual or used oil in the steers´ diet decreased dry matter intake but did not modify daily live weight gain, resulting in a bather food efficiency and food cost.
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CAMPOS, F. R. Óleo de fritura residual na alimentação de Tourinhos Rednorte terminados em confinamento. 2009. 34 p. Dissertação (Mestrado em Zootecnia)-Universidade Federal de Lavras, Lavras, 2009.