Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-11-17T11:31:11Z No. of bitstreams: 2 edilson_almeida.pdf: 627105 bytes, checksum: a0b76b2072690c3740d1f97384c5ba3b (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-11-17T11:31:45Z (GMT) No. of bitstreams: 2 edilson_almeida.pdf: 627105 bytes, checksum: a0b76b2072690c3740d1f97384c5ba3b (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Made available in DSpace on 2015-11-17T11:31:45Z (GMT). No. of bitstreams: 2 edilson_almeida.pdf: 627105 bytes, checksum: a0b76b2072690c3740d1f97384c5ba3b (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Previous issue date: 2012 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Objetivou-se com este estudo avaliar o uso de aditivos digestivos (enzimas) e equilibradores da microbiota intestinal (?cidos org?nicos, extratos vegetais, probi?ticos e simbi?ticos) sob os par?metros de desempenho (ganho em peso, consumo de ra??o, convers?o alimentar, viabilidade e ?ndice de efici?ncia europeu), rendimento de carca?a e cortes, qualidade da carne e empenamento de frangos de corte criados com o uso de cama de avi?rio reutilizada. Foram utilizadas 552 aves sexadas, da linhagem Hubbard, com um dia de idade, distribu?das segundo um delineamento inteiramente casualisado com seis tratamentos (controle negativo: dieta controle (DC) sem aditivos; DC + extrato vegetal (alho + or?gano); DC + complexo enzim?tico (protease, amilase e celulase); DC + probi?tico; DC + simbi?tico e DC + ?cidos org?nicos (ac?tico, f?rmico e propi?nico), com quatro repeti??es (duas de macho e duas de f?meas) de 23 aves cada. Os par?metros de desempenho das aves foram avaliados de 1 a 7, 1 a 21, 1 a 35 e 1 a 42 dias de idade. Aos 42 dias, foram abatidas 3 aves de cada parcela experimental para avalia??o do rendimento de carca?a e cortes e dos par?metros de qualidade da carne do peito (capacidade de reten??o de ?gua, valor de pH, perda de peso por cozimento, maciez objetiva e colora??o). O empenamento das aves foi avaliado aos 28 e 35 dias de idade. Houve diferen?as das dietas sobre o ganho em peso das aves de 1 a 21 e de 1 a 35 dias, e as aves suplementadas com a dieta de extrato vegetal apresentaram maior ganho em peso que as aves suplementadas com as dietas de probi?tico e simbi?tico. Durante o per?odo total de cria??o, n?o houve efeito das dietas sobre o rendimento de carca?a e cortes, na qualidade da carne e no empenamento das aves. O sexo afetou o desempenho, rendimento de peito e carne do peito e o empenamento das aves, e os machos apresentaram melhores resultados de desempenho. A viabilidade foi melhor para as f?meas, que tamb?m apresentaram maiores rendimentos de peito e carne do peito e melhor empenamento. Os dados verificados permitem concluir que o uso dos aditivos digestivos e equilibradores da microbiota intestinal n?o afetam o desempenho, o rendimento de carca?a e cortes, a qualidade da carne e o empenamento. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2012. / ABSTRACT The objective of this study to evaluate the use of digestive additives (enzymes) and balancing the intestinal microbiota (organic acids, plant extracts, probiotics and symbiotics) on performance parameters (weight gain, feed intake, feed conversion, viabibility and european efficiency index), carcass yield and cuts, meat quality and feathering of broilers, created with the use of reused litter. Five hundred fifty-two sexed birds were used, strain Hubbard, with one day of age, distributed according to a completely randomized design with six treatments (negative control: control diet (CD) without additives; CD + plant extract (garlic + oregano); CD + complex enzyme (protease, amylase and cellulase); CD + probiotic; CD + symbiotic and CD + organic acids (acetic, formic and propionic acids) with four replications (two male and two females) of 23 birds each. Performance parameters were evaluated 1-7, 1-21, 1-35 and 1-42 day-old birds. At 42 days, three birds were slaughtered each plot for evaluation of carcass yield and cuts and parameters of meat quality of breast (water retention capacity, Ph value, cooking weight loss, objective tenderness and coloring). The feathering of the birds was evaluated at 28 and 35 days old. There were differences of diets on weight gain of broilers 1-21 and 1 to 35 days, and broilers supplemented diet with extract plant showed higher weight gain than broilers supplemented diets with probiotic and symbiotic. During the whole period of creation, there was no effect of diets on carcass yield and cuts, meat quality and feather covering. The sex affected performance, breast meat yield and breast meat and feather covering, and the males showed better performance results. The viability, which was better for females, which also showed higher values of breast and breast meat and better bending. Data verified the conclusion that the use of additives and digestive balancing the intestinal microbiota does not affect performance, yield carcass and cuts, meat quality and warping.

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-11-18T12:22:40Z No. of bitstreams: 2 graciele_araujo_oliveira.PDF: 736032 bytes, checksum: 8f4728012526a950d2e16deec5ce1e59 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-11-18T12:23:00Z (GMT) No. of bitstreams: 2 graciele_araujo_oliveira.PDF: 736032 bytes, checksum: 8f4728012526a950d2e16deec5ce1e59 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Made available in DSpace on 2015-11-18T12:23:00Z (GMT). No. of bitstreams: 2 graciele_araujo_oliveira.PDF: 736032 bytes, checksum: 8f4728012526a950d2e16deec5ce1e59 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Previous issue date: 2010 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Este trabalho objetivou avaliar o efeito de diferentes aditivos alternativos (alho, saponina, probi?ticos, prebi?ticos, ?cidos org?nicos e complexos enzim?ticos), em substitui??o aos antibi?ticos, sobre os par?metros de desempenho, rendimento de carca?a e cortes, custo de produ??o, empenamento e qualidade da carne de frangos de corte. Foram utilizados 744 pintainhos, sexados, com um dia de idade, da linhagem Cobb 500. As aves foram distribu?das segundo um delineamento inteiramente casualizado com seis tratamentos (T1: ra??o basal (RB) + vacina de coccidiose (VC); T2: RB + antibi?tico + anticoccidiano; T3: RB + ?cidos org?nicos + VC; T4: RB + simbi?tico + VC; T5: RB + complexo enzim?tico + VC eT6: RB + extratos vegetais + VC) com quatro repeti??es de 31 aves. Os tratamentos influenciaram os par?metros de desempenho aos 7, 21 e 35 dias de idade das aves, mas n?o afetaram o desempenho quando considerado o per?odo total de cria??o. O uso de aditivos alternativos aumentou o custo de produ??o, sendo que as dietas contendo simbi?ticos, complexo enzim?tico e extratos vegetais apresentaram maior custo. O empenamento n?o foi afetado pelos tratamentos. O rendimento de carca?a e cortes e as caracter?sticas de qualidade da carne n?o foram afetados pelos tratamentos avaliados. Com base nos resultados verificados, pode-se concluir que a substitui??o dos antibi?ticos por aditivos alternativos na alimenta??o de frangos de corte, n?o afeta o desempenho final das aves abatidas com 42 dias e n?o alteram o rendimento de carca?a e cortes e a qualidade da carne das aves, mas onera os custos em at? 15%, quando se utiliza aditivos nas dietas. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2010. / ABSTRACT The antibiotics used in animal food to promote growth have been gradually banished due to the possible risk of cross-resistance to drugs used to human therapy. As a result, the search for food without these products is increasing. This study aimed to evaluate the effect of different alternative additives (garlic, saponine, probiotics, prebiotics, and enzymatic complex and organic acids) to substitute antibiotics on parameters of performance, carcass and cuts yield, production cost, feathering and quality of broilers? meat. A total of 744 one day old sexed broilers chicks Cobb 500 line were distributed in 6 treatments (T1: basal diet (BD) + coccidiosis vaccine (CV); T2: BD + antibiotic + anticoccidian; T3: BD + organic acid + CV; T4: BD + symbiotic + CV; T5: BD + enzymatic complex + CV; T6: BD + vegetal extract + CV) under a completely randomized design, with 4 replicates and 31 chicks per experimental unit.Treatments influenced performance at 7, 21 and 35 days old, but they did not affect it when considered the total breeding period. Additives use increased production cost, and diets with symbiotics, enzymatic complex and vegetal extract showed higher cost. Feathering, carcass and cuts yield and meat quality characteristics were not affected by the treatments. Results conclude that substituting antibiotics to additives on broilers food cause performance reduction on feeding initial phase, but it did not affect the final performance, nor carcass and cuts yield or meat quality of chicken slaughtered at 42 days old, but it burdens costs up to 15% when additives are used in diets.