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Previous issue date: 2013 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Foram analisados o consumo, a digestibilidade, os horm?nios tireoidianos e as enzimas hep?ticas, com o objetivo de avaliar os poss?veis efeitos da substitui??o do farelo de soja (FS) pelo farelo de crambe (FC) (Crambe Abyssinica), em dietas para bovinos leiteiros. Foram utilizados quatro bovinos Holand?s x Zebu castrados, com peso m?dio de 664 kg. A dieta foi formulada segundo o NRC (2001), atendendo a rela??o volumoso: concentrado 60:40 na mat?ria seca (MS), tendo a silagem de milho e o feno de tifton com o volumoso em todas as dietas, em propor??es m?dias fixas de 33% e 67% na MS, respectivamente. Os animais receberam quatro dietas contendo 0%, 2,8%, 6,4% e 11,0% de FC na MS da dieta, o qual representava substitui??o do FS em 0%, 33%, 66% e 99% por FC na MS da dieta. N?o foram observados efeitos (p>0,05) dos n?veis de substitui??o para os consumos de mat?ria seca,mat?ria org?nica, fibra em detergente neutro corrigido para cinzas e prote?na, fibra em detergente ?cido, carboidratos n?o fibrosos, prote?na bruta, extrato et?reo e nutrientes digest?veis totais quando expressos em %PV, observando-se m?dias de 2,50%, 2,22%, 1,14%, 0,52%, 0,66%, 0,34%, 0,07% e 1,21%, respectivamente.As digestibilidades aparentes totais da fibra em detergente neutro, fibra em detergente ?cido, carboidratos n?o fibrosos, prote?na bruta e extrato et?reo tamb?m n?o foram influenciadas pelos n?veis crescentes do FC, apresentando valores m?dios de 41,59%, 32,55%, 73,85%, 63,65%, respectivamente. Entretanto, a digestibilidade da mat?ria seca e mat?ria org?nica, reduziram-se, significativamente (p<0,05), com o aumento da inclus?o do FC nas dietas. N?o houve diferen?a (P>0,05) na avalia??o das atividades s?ricas enzim?ticas em nenhum dos tratamentos analisados, sendo os valores m?dios de GGT de 39,03UI/L., AST de 68,34UI/L., e ALT de 24.781UI/L.A inclus?o do FC tamb?m n?o ocasionou diferen?as significativas (P>0,05) para os n?veis de T4 livre 1,27 uUI/mL. Para os teores de TSH, houve maior frequ?ncia de resultados para valores inferiores a 0,008 uUI/mL. O FC n?o afeta o consumo e os par?metros sangu?neos dos bovinos, todavia exerce efeito negativo na digestibilidade da mat?ria seca e da mat?ria org?nica. / The digestibility, the thyroidal hormones and the hepatic enzymes were analyzed with the purpose of measure the possible effects of the substitution of the soy bran for the crambe bran, on the dairy cattle?s diet. It was used four Holstein x Zebu bovines, castrated, with average weight of 664 kg. The diet was formulated according to NRC (2001) serving the relation voluminous: concentrate 60:40 on dry matter (MS), with corn silage and hay as roughage in all diets, with average fixed proportions of 33% and 67% in MS, respectively. The animals received four diets containing 0%, 2.8%, 6.4%and 11.0% of bran in the diet DM crambe, which represented replacement of soybean meal at 0%, 33%, 66% and 99% by bran crambe of the diet DM. No effects were observed (p>0,05) in the levels of by-product for the consumption of dry matter, organic matter, neutral detergent fiber corrected for ash and protein, acid detergent fiber, non-fiber carbohydrates, crude protein, ether extract, total digestible nutrients, when expressed in %PV, observing averages of 2,50%, 2,22%, 1,14%, 0,52%, 0,66%, 0,34%, 0,07% and 1,21%, respectively. The total apparent digestibilities of neutral detergent fiber corrected for ash and protein, acid detergent fiber, non-fiber carbohydrates, crude protein and ether extract, also were not affected by increasing levels of FC presenting medium values of 59,34%, 41,59%, 32,55%, 73,85%, 63,65%, respectively. However, the digestibilities of dry matter and organic matter decreased significantly (p<0,05) with increased inclusion of FC on the diets. There was no difference (p>0,05) in the assessment of seric enzymatic activities in none of the analyzed treatments, with GGT medium values of 39,03UI/L., AST de 68,34UI/L., and ALT de 24.781UI/L. Also levels of by-product did not cause significant differences (p>0,05) in the levels of free T4 1,27 uUI/mL. For the levels of TSH, there was more tendency of resulted a range of results below 0,008 uUI/mL. The FC does not affect the consumption and the blood parameters of the bovines, although it exerts negative effect on the digestibility of dry matter and organic matter. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2013
| Identifer | oai:union.ndltd.org:IBICT/oai:acervo.ufvjm.edu.br/jspui:1/319 |
| Date | January 2013 |
| Creators | Herculano, Bruna Nogueira |
| Contributors | Mourth?, M?rio Henrique Fran?a, Rodriguez, Norberto Mario, Santos, Roseli Aparecida dos, Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM), Castro, Gustavo Henrique de Frias |
| Publisher | UFVJM |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFVJM, instname:Universidade Federal dos Vales do Jequitinhonha e Mucuri, instacron:UFVJM |
| Rights | A concess?o da licen?a deste item refere-se ao ? termo de autoriza??o impresso assinado pelo autor, assim como na licen?a Creative Commons, com as seguintes condi??es: Na qualidade de titular dos direitos de autor da publica??o, autorizo a Universidade Federal dos Vales do Jequitinhonha e Mucuri e o IBICT a disponibilizar por meio de seus reposit?rios, sem ressarcimento dos direitos autorais, de acordo com a Lei n? 9610/98, o texto integral da obra disponibilizada, conforme permiss?es assinaladas, para fins de leitura, impress?o e/ou download, a t?tulo de divulga??o da produ??o cient?fica brasileira, e preserva??o, a partir desta data., info:eu-repo/semantics/openAccess |
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