Protein levels and environmental temperature effects on carcass characteristics, performance, and nitrogen excretion of broiler chickens from 7 to 21 days of age

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dc.contributor.authorFaria Filho, DE [UNESP]
dc.contributor.authorRosa, PS [UNESP]
dc.contributor.authorVieira, BS [UNESP]
dc.contributor.authorMacari, Marcos [UNESP]
dc.contributor.authorFurlan, Renato Luis [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.contributor.institutionUnC
dc.date.accessioned2014-05-20T13:15:44Z
dc.date.available2014-05-20T13:15:44Z
dc.date.issued2005-12-01
dc.description.abstractThis trial was conducted to evaluate the utilization of low-protein diets formulated based on the ideal protein concept for broiler chickens from 7 to 21 days of age reared at different environmental temperatures. Nine hundred male Cobb-500® chickens were used. At day seven chicks were distributed according to a completely randomized design in a 3 x 3 factorial with four replications of 25 birds each. It was used three crude protein levels in the diet (21.5; 20.0 and 18.5%) and three environmental temperatures (low, thermoneutral and high). The performance, carcass characteristics (yield and chemical composition), and nitrogen ingestion and excretion were assessed. There was no significant interaction among the factors for the evaluated variables. Environmental temperatures affected differently chicken performance. High environmental temperature resulted in lower weight gain and higher wing fat percentage, whereas cold temperature resulted in higher feed conversion. on the other hand, low-protein diets decreased weight gain, breast yield, nitrogen excretion and influenced breast and wings chemical composition. Birds reared at high environmental temperature showed lower nitrogen intake and excretion. The results showed that the decrease in protein levels from 7 to 21 days of age contributed to lower nitrogen excretion in broiler chickens, but impaired performance and carcass characteristics independent of rearing temperature.en
dc.description.affiliationUNESP FCAV Departamento de Morfologia e Fisiologia Animal
dc.description.affiliationEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA) CNPSA
dc.description.affiliationUnC
dc.description.affiliationUnespUNESP FCAV Departamento de Morfologia e Fisiologia Animal
dc.format.extent247-253
dc.identifierhttp://dx.doi.org/10.1590/S1516-635X2005000400009
dc.identifier.citationRevista Brasileira de Ciência Avícola. Fundação APINCO de Ciência e Tecnologia Avícolas, v. 7, n. 4, p. 247-253, 2005.
dc.identifier.doi10.1590/S1516-635X2005000400009
dc.identifier.fileS1516-635X2005000400009.pdf
dc.identifier.issn1516-635X
dc.identifier.lattes5713558572926669
dc.identifier.lattes0806409484159642
dc.identifier.orcid0000-0001-9549-0329
dc.identifier.scieloS1516-635X2005000400009
dc.identifier.urihttp://hdl.handle.net/11449/2796
dc.language.isoeng
dc.publisherFundação APINCO de Ciência e Tecnologia Avícolas
dc.relation.ispartofRevista Brasileira de Ciência Avícola
dc.relation.ispartofjcr0.463
dc.rights.accessRightsAcesso aberto
dc.sourceSciELO
dc.subjectBroiler chicksen
dc.subjectenvironmental temperatureen
dc.subjectIdeal proteinen
dc.subjectnitrogen excretionen
dc.subjectPerformanceen
dc.titleProtein levels and environmental temperature effects on carcass characteristics, performance, and nitrogen excretion of broiler chickens from 7 to 21 days of ageen
dc.typeArtigo
unesp.author.lattes5713558572926669
unesp.author.lattes0806409484159642[5]
unesp.author.orcid0000-0002-6850-7145[4]
unesp.author.orcid0000-0001-9549-0329[5]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt
unesp.departmentMorfologia e Fisiologia Animal - FCAVpt

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Jaboticabal - FCAV - Faculdade de Ciências Agrárias e Veterinárias