Fontes de óleo vegetal na dieta de cordeiros em confinamento
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Data
2005-04-01
Autores
Yamamoto, Sandra Mari [UNESP]
Macedo, Francisco de Assis Fonseca de
Zundt, Marilice
Mexia, Alexandre Agostinho
Sakaguti, Eduardo Shiguero
Rocha, Guilherme Bareia Liberato
Regaçoni, Kelly Cristina Telles
Macedo, Rosa Maria Gomes de
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Zootecnia
Resumo
Objetivou-se avaliar a ingestão de matéria seca, o ganho de peso diário, a conversão alimentar, o peso vivo ao abate e o período de confinamento em cordeiros Santa Inês puros e ½Dorset ½Santa Inês, alimentados com dietas isoenergéticas (76,59% de NDT) e isoprotéicas (17,48% de PB) contendo diferentes fontes de óleo vegetal (óleos de soja, canola e linhaça) e uma dieta controle (sem inclusão de óleo vegetal). A relação volumoso:concentrado foi de 30:70 e utilizou-se feno de aveia como volumoso. Realizou-se também um ensaio de digestibilidade, utilizando quatro cordeiros não-castrados, distribuídos em delineamento quadrado latino, avaliando-se ingestão, excreção fecal e digestibilidade total dos nutrientes das rações. A ingestão de matéria seca, expressa em porcentagem do peso vivo, foi menor nos cordeiros que receberam dieta contendo óleo de canola que naqueles que receberam dieta controle. Porém, todas as rações proporcionaram ganhos de peso e conversão alimentar satisfatórios. Os valores de digestibilidade total da matéria seca (76,02%) e matéria orgânica (76,82%) da dieta controle foram superiores aos da dieta contendo óleo de linhaça (72,11% e 72,97%, respectivamente), embora não tenham diferido das dietas contendo óleos de soja (72,94 e 73,71%) e canola (73,45 e 74,25%). A digestibilidade do extrato etéreo foi menor na dieta controle (84,02%), enquanto as demais dietas apresentaram valor médio de 91,98%. Os óleos vegetais reduziram a digestibilidade da matéria seca e da matéria orgânica, não afetando a ingestão e digestão dos demais nutrientes.
This experiment was carried out to evaluate the dry matter ingestion, average daily gain, feed:gain ratio, live weight at slaughter and days in trial in pure Santa Inês and ½Dorset ½Santa Inês lambs, submitted to isoenergetic (76.59% TDN) and isoprotein (17.48% crude protein) diets with different sources of vegetable oil (soybean oil, canola and linseed) and a control diet (without vegetable oil inclusion). The forage:concentrate ratio was 30:70, and oat hay was used as forage. Digestibility analysis was performed, using four no castrated lambs distributed in latin square design, for evaluating ingestion, fecal excretion and total digestibility of the nutrients. The dry matter intake, expresses in percentage of the live weight, was smaller in the lambs that received diet with canola oil in relation to those that received control diet. However, all the diets provided satisfactory average weight gain and feed:gain ratio. The dry matter (76.02%) and organic matter (76.82%) total digestibility values of the control diet were higher than diet with linseed oil (72.11% and 72.97%, respectively), although they have not difference of the diets with soybean (72.94 and 73.71%) and canola oils (73.45 and 74.25%) and these did not differ of the diet with linseed oil. Digestibility of ether extract was smaller in the control diet (84.02%), while the other diets showed average value of 91.98%. The vegetable oils reduced the digestibility of dry and organic matter, not affecting the digestion of the other nutrients.
This experiment was carried out to evaluate the dry matter ingestion, average daily gain, feed:gain ratio, live weight at slaughter and days in trial in pure Santa Inês and ½Dorset ½Santa Inês lambs, submitted to isoenergetic (76.59% TDN) and isoprotein (17.48% crude protein) diets with different sources of vegetable oil (soybean oil, canola and linseed) and a control diet (without vegetable oil inclusion). The forage:concentrate ratio was 30:70, and oat hay was used as forage. Digestibility analysis was performed, using four no castrated lambs distributed in latin square design, for evaluating ingestion, fecal excretion and total digestibility of the nutrients. The dry matter intake, expresses in percentage of the live weight, was smaller in the lambs that received diet with canola oil in relation to those that received control diet. However, all the diets provided satisfactory average weight gain and feed:gain ratio. The dry matter (76.02%) and organic matter (76.82%) total digestibility values of the control diet were higher than diet with linseed oil (72.11% and 72.97%, respectively), although they have not difference of the diets with soybean (72.94 and 73.71%) and canola oils (73.45 and 74.25%) and these did not differ of the diet with linseed oil. Digestibility of ether extract was smaller in the control diet (84.02%), while the other diets showed average value of 91.98%. The vegetable oils reduced the digestibility of dry and organic matter, not affecting the digestion of the other nutrients.
Descrição
Palavras-chave
consumo, digestibilidade, ganho de peso, digestibility, intake, weight gain
Como citar
Revista Brasileira de Zootecnia. Sociedade Brasileira de Zootecnia, v. 34, n. 2, p. 703-710, 2005.