Alternative to use of chemical promoters of growth about the performance and broilers carcass characteristics

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: 2010Coordena??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