Protein levels for heat-exposed broilers: Performance, nutrients digestibility, and energy and protein metabolism

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorFaria Filho, Daniel Emygdio de
dc.creatorCampos, Daniel Mendes Borges
dc.creatorAlfonso-Torres, Karoll Andrea
dc.creatorVieira, Bruno Serpa
dc.creatorRosa, Paulo Sérgio
dc.creatorVaz, Aiani Maria
dc.creatorMacari, Marcos
dc.creatorFurlan, Renato Luis
dc.date2014-05-27T11:22:30Z
dc.date2016-10-25T18:23:58Z
dc.date2014-05-27T11:22:30Z
dc.date2016-10-25T18:23:58Z
dc.date2007-06-11
dc.date.accessioned2017-04-06T01:25:16Z
dc.date.available2017-04-06T01:25:16Z
dc.identifierInternational Journal of Poultry Science, v. 6, n. 3, p. 187-194, 2007.
dc.identifier1682-8356
dc.identifierhttp://hdl.handle.net/11449/69715
dc.identifierhttp://acervodigital.unesp.br/handle/11449/69715
dc.identifier10.3923/ijps.2007.187.194
dc.identifier2-s2.0-34249883037
dc.identifierhttp://dx.doi.org/10.3923/ijps.2007.187.194
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/890921
dc.descriptionHeat stress causes significant economic losses on broilers production due to poorer performance and carcass quality. Considering that protein has the highest heat increment among nutrients, it has been suggested that protein levels should be reduced in diets for heat-exposed broilers. Nevertheless, there are no conclusive results on the benefits of such practice, and further studies should be performed to elucidate some reported discrepancies. Thus, a trial was carried out to evaluate the effects of dietary protein levels (17, 20 and 23%) and environmental temperature (22 and 32°C) on the performance, nutrients digestibility, and energy and protein metabolism of broiler chickens from 21 to 42 days of age. Nutrients digestibility was determined by total excreta collection, and energy and protein metabolism was evaluated by comparative slaughter method. It was concluded that (1) heat exposure impairs broilers performance and increases nitrogen excretion, but do not change nutrients digestibility; (2) high-protein diets are technically feasible and promotes lower heat production for broilers reared under thermoneutral or hot environments, however, high-protein diets increases nitrogen excretion. © Asian Network for Scientific Information, 2007.
dc.languageeng
dc.relationInternational Journal of Poultry Science
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectComparative slaughter
dc.subjectHeat stress
dc.subjectIdeal protein
dc.subjectNitrogen excretion
dc.subjectTotal excreta collection
dc.subjectGallus gallus
dc.titleProtein levels for heat-exposed broilers: Performance, nutrients digestibility, and energy and protein metabolism
dc.typeOtro


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