The effects of restricting enzyme supplementation in wheat-based diets to broilers

Detalhes bibliográficos
Autor(a) principal: Figueiredo, A.A.
Data de Publicação: 2012
Outros Autores: Correia, B.A., Ribeiro, T., Ponte, P.I.P., Falcão-Cunha, L., Freire, J.P.B., Prates, J.A.M., Ferreira, L.M.A., Fontes, C.M.G.A., Lordelo, M.M.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.5/11489
Resumo: The performance of broilers fed on xylanase supplemented diets for part or all of the production cycle was evaluated in two experiments. In a preliminary experiment, 1-day-old chicks were fed a wheat-based diet supplemented with a commercial xylanase for the entire duration of the experiment of 28 days, or during the last 21, 14, or 7 days of the trial. In experiment 2, the growth period was extended to 36 days, and birds were fed xylanase supplemented diets for the entire duration of the experiment, or during the last 27, 18, or 9 days of the trial. In both experiments, an additional group was fed a non-supplemented control diet. Xylanase-supplemented broilers outperformed non-supplemented birds. Significant differences in body weight emerged at 21–28 days of age, suggesting that the response to xylanase supplementation occurs primarily during the latter stages of broiler growth. Broilers fed xylanase-supplemented diets for the entire experiment presented similar growth performance, intestinal viscosity, gastrointestinal enzyme activity and organ sizes when compared with birds supplemented with the exogenous xylanase for the last 14 (experiment 1) or the last 18 days (experiment 2) of the trials. Birds exposed to exogenous xylanase for the entire duration of the experiment showed, however, a non-significant trend (P<0.1) towards an improved final body weight and feed conversion ratio. Nevertheless, it appears that an early exposure to the exogenous xylanase is of marginal importance in obtaining a significant response to xylanase supplementation by broilers fed wheat-based diets
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spelling The effects of restricting enzyme supplementation in wheat-based diets to broilersbroilerenzymewheatxylanaseThe performance of broilers fed on xylanase supplemented diets for part or all of the production cycle was evaluated in two experiments. In a preliminary experiment, 1-day-old chicks were fed a wheat-based diet supplemented with a commercial xylanase for the entire duration of the experiment of 28 days, or during the last 21, 14, or 7 days of the trial. In experiment 2, the growth period was extended to 36 days, and birds were fed xylanase supplemented diets for the entire duration of the experiment, or during the last 27, 18, or 9 days of the trial. In both experiments, an additional group was fed a non-supplemented control diet. Xylanase-supplemented broilers outperformed non-supplemented birds. Significant differences in body weight emerged at 21–28 days of age, suggesting that the response to xylanase supplementation occurs primarily during the latter stages of broiler growth. Broilers fed xylanase-supplemented diets for the entire experiment presented similar growth performance, intestinal viscosity, gastrointestinal enzyme activity and organ sizes when compared with birds supplemented with the exogenous xylanase for the last 14 (experiment 1) or the last 18 days (experiment 2) of the trials. Birds exposed to exogenous xylanase for the entire duration of the experiment showed, however, a non-significant trend (P<0.1) towards an improved final body weight and feed conversion ratio. Nevertheless, it appears that an early exposure to the exogenous xylanase is of marginal importance in obtaining a significant response to xylanase supplementation by broilers fed wheat-based dietsElsevierRepositório da Universidade de LisboaFigueiredo, A.A.Correia, B.A.Ribeiro, T.Ponte, P.I.P.Falcão-Cunha, L.Freire, J.P.B.Prates, J.A.M.Ferreira, L.M.A.Fontes, C.M.G.A.Lordelo, M.M.2016-05-03T15:12:51Z20122012-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.5/11489eng"Animal Feed Science and Technology". ISSN 0377-8401. 172 (2012) p. 194-200info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-11-20T19:05:43Zoai:repositorio.ul.pt:10400.5/11489Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-11-20T19:05:43Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv The effects of restricting enzyme supplementation in wheat-based diets to broilers
title The effects of restricting enzyme supplementation in wheat-based diets to broilers
spellingShingle The effects of restricting enzyme supplementation in wheat-based diets to broilers
Figueiredo, A.A.
broiler
enzyme
wheat
xylanase
title_short The effects of restricting enzyme supplementation in wheat-based diets to broilers
title_full The effects of restricting enzyme supplementation in wheat-based diets to broilers
title_fullStr The effects of restricting enzyme supplementation in wheat-based diets to broilers
title_full_unstemmed The effects of restricting enzyme supplementation in wheat-based diets to broilers
title_sort The effects of restricting enzyme supplementation in wheat-based diets to broilers
author Figueiredo, A.A.
author_facet Figueiredo, A.A.
Correia, B.A.
Ribeiro, T.
Ponte, P.I.P.
Falcão-Cunha, L.
Freire, J.P.B.
Prates, J.A.M.
Ferreira, L.M.A.
Fontes, C.M.G.A.
Lordelo, M.M.
author_role author
author2 Correia, B.A.
Ribeiro, T.
Ponte, P.I.P.
Falcão-Cunha, L.
Freire, J.P.B.
Prates, J.A.M.
Ferreira, L.M.A.
Fontes, C.M.G.A.
Lordelo, M.M.
author2_role author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Figueiredo, A.A.
Correia, B.A.
Ribeiro, T.
Ponte, P.I.P.
Falcão-Cunha, L.
Freire, J.P.B.
Prates, J.A.M.
Ferreira, L.M.A.
Fontes, C.M.G.A.
Lordelo, M.M.
dc.subject.por.fl_str_mv broiler
enzyme
wheat
xylanase
topic broiler
enzyme
wheat
xylanase
description The performance of broilers fed on xylanase supplemented diets for part or all of the production cycle was evaluated in two experiments. In a preliminary experiment, 1-day-old chicks were fed a wheat-based diet supplemented with a commercial xylanase for the entire duration of the experiment of 28 days, or during the last 21, 14, or 7 days of the trial. In experiment 2, the growth period was extended to 36 days, and birds were fed xylanase supplemented diets for the entire duration of the experiment, or during the last 27, 18, or 9 days of the trial. In both experiments, an additional group was fed a non-supplemented control diet. Xylanase-supplemented broilers outperformed non-supplemented birds. Significant differences in body weight emerged at 21–28 days of age, suggesting that the response to xylanase supplementation occurs primarily during the latter stages of broiler growth. Broilers fed xylanase-supplemented diets for the entire experiment presented similar growth performance, intestinal viscosity, gastrointestinal enzyme activity and organ sizes when compared with birds supplemented with the exogenous xylanase for the last 14 (experiment 1) or the last 18 days (experiment 2) of the trials. Birds exposed to exogenous xylanase for the entire duration of the experiment showed, however, a non-significant trend (P<0.1) towards an improved final body weight and feed conversion ratio. Nevertheless, it appears that an early exposure to the exogenous xylanase is of marginal importance in obtaining a significant response to xylanase supplementation by broilers fed wheat-based diets
publishDate 2012
dc.date.none.fl_str_mv 2012
2012-01-01T00:00:00Z
2016-05-03T15:12:51Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.5/11489
url http://hdl.handle.net/10400.5/11489
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv "Animal Feed Science and Technology". ISSN 0377-8401. 172 (2012) p. 194-200
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv mluisa.alvim@gmail.com
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