Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-12-19T12:25:07Z No. of bitstreams: 2 sandro_braga_soares.PDF: 1522684 bytes, checksum: e4b75192ce73d2d347e5f0dc806fc8e3 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-12-19T12:58:53Z (GMT) No. of bitstreams: 2 sandro_braga_soares.PDF: 1522684 bytes, checksum: e4b75192ce73d2d347e5f0dc806fc8e3 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2015-12-19T12:58:53Z (GMT). No. of bitstreams: 2 sandro_braga_soares.PDF: 1522684 bytes, checksum: e4b75192ce73d2d347e5f0dc806fc8e3 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2010 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Foi realizado um estudo avaliando a utiliza??o de duas fontes de lip?dio e uma ra??o controle, associadas a dois n?veis de monensina na alimenta??o de cordeiros. O ensaio de desempenho foi realizado no Setor de ovinocultura da Fazenda Experimental do Moura, Curvelo-MG, da Universidade Federal dos Vales do Jequitinhonha e Mucuri. Foram utilizados 36 cordeiros, 18 machos inteiros e 18 F?meas, Santa In?s x Texel, terminados em sistema intensivo, alimentados com seis dietas: dieta controle (RC), ?leo de soja (OS), gr?o de soja (GS), controle com adi??o de monensina (RC+M), ?leo de soja com adi??o de monensina (OS+M) e gr?o de soja com adi??o de monensina (GS+M). Os animais foram abatidos ap?s 87 dias de confinamento, sendo avaliados o desempenho, as caracter?sticas de carca?a, os pesos e percentagens dos componentes da carca?a e n?o carca?a. O ensaio de digestibilidade foi realizado nas depend?ncias do Laborat?rio de Pesquisa Animal da Universidade Federal de Lavras, sendo utilizadas18 borregas Santa In?s com 6 meses de idade e 29kg, confinadas em gaiolas de metabolismo por 21 dias, sendo 14 dias de adapta??o de 7 dias de coleta de fezes, urina, sobras e amostras de ra??o. Os tratamentos foram constitu?dos das ra??es citadas acima, e no pen?ltimo dia do per?odo experimental realizou-se a coleta de sangue dos animais para avalia??o de constituintes sangu?neos indicadores do metabolismo energ?tico, prot?ico e fun??o hep?tica. Os dados foram avaliados pelo procedimento GLM do SAS, e as m?dias comparadas e analisadas pelo teste de t a 5% de probabilidade. Houve superioridade no desempenho, consumo e digestibilidade dos animais que receberam dieta controle em rela??o aos animais que receberam gr?o de soja, sendo que a dieta com ?leo n?o diferiu da controle na maioria dos par?metros analisados. Os animais que receberam monensina apresentaram menores coeficientes de digestibilidade, menor consumo de todos os nutrientes analisados, menor desempenho e apresentaram ind?cios de problemas hep?ticos. Os machos tiveram desempenho e cortes mais pesados que as f?meas. N?o se recomenda o uso de monensina a 78 ppm em base da mat?ria seca para cordeiros em confinamento. O ?leo de soja n?o melhorou o desempenho, consumo e digestibilidade das dietas e o gr?o de soja, adicionado em 15% na mat?ria seca da ra??o, piorou esse par?metros. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2010. / ABSTRACT There was conducted a study to evaluate the use of two fat sources and a control diet, combined with two monensin levels on lambs feed. The performance test was accomplished at a sheep industry sector of the Federal University of the Jequitinhonha and Mucuri Valleys in the Moura Experimental Farm, Curvelo-MG. The work evaluated 36 lambs, 18 males and 18 females, Santa In?s x Texel finished in feedlot and fed with six diets: control diet (RC), soybean oil (SO), soybean (GS), control with monensin addition (CR + M), soybean oil with monensin addition (OS + M) and soybean with monensin addition (GS + M). The animals were slaughtered after 87 days of confinement, being evaluated for performance, carcass characteristics, weights and percentages of carcass and not carcass components. The digestibility trial was conducted on the premises of the Animal Research Laboratory of the Lavras Federal University evaluating 18 Santa Ines lambs with 6 months of age and 29kg, confined in metabolism cages for 21 days, being 14 days for adaptation counting 7 days of collection of feces, urine, and samples of feed. The treatments consisted of the diets mentioned above, and one day before the end of the experiment there was collected animals blood sampling for blood constituents evaluation, which are indicators of energy metabolism, protein and liver function. The data were analyzed by GLM procedure of SAS and the average were compared and analyzed by t test for 5% of probability. There were higher in performance, intake and digestibility of pigs fed with the control diet compared to animals fed with soybean, and oil diet did not differ from controls in most parameters. The animals fed with monensin had lower digestibility, lower consumption of all nutrients, lower performance and showed signs of liver problems. Males had cuts and performance heavier than females. There are not recommended the monensin use at 78 ppm in dry matter basis for confined lambs. Soybean oil has not improved performance, intake or digestibility of diets and the soybean, added 15% in the dry matter, worsened this parameters.