Influence of Dietary Lysine Levels and Arginine:Lysine Ratios on Performance of Broilers Exposed to Heat or Cold Stress during the Period of Three to Six Weeks of Age

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dc.contributor.authorMendes, A. A. [UNESP]
dc.contributor.authorWatkins, S. E.
dc.contributor.authorEngland, J. A.
dc.contributor.authorSaleh, E. A.
dc.contributor.authorWaldroup, A. L.
dc.contributor.authorWaldroup, P. W.
dc.contributor.institutionUniversity of Arkansas
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:18:12Z
dc.date.available2014-05-27T11:18:12Z
dc.date.issued1997-03-01
dc.description.abstractFour trials of identical experimental design were conducted to determine the effects of temperature, dietary Lys level, and dietary Arg:Lys ratios on performance and carcass yield of male broilers. Birds of a commercial strain were grown from 21 to 42 d of age in wire-floored finishing batteries placed in environmental chambers. The chambers were programmed to provide either a constant thermoneutral temperature (21.1 C), a constant cold temperature (15.5 C), or a cycling hot diurnal temperature (25.5 to 33.3 C). Within each environment there was a factorial arrangement of three Lys levels (1.0, 1.1, and 1.2%) with four Arg:Lys ratios (1.1:1, 1.2:1, 1.3:1, and 1.4:1). Environmental temperature significantly influenced virtually every characteristic examined. Hot cyclic temperatures reduced weight gain, feed intake, and breast meat yield, and increased feed conversion, dressing percentage, leg quarter yield, and abdominal fat content. The cold environment promoted increased feed intake and mortality. Ascites and cardiomyopathy were the leading causes of death under cold exposure and thermoneutral conditions, whereas complications arising from heat exposure were the main cause of death under hot cyclic conditions. Levels of Lys affected leg quarter yield and abdominal fat content over all environments but increased breast meat yield only under cold conditions. Increasing Arg: Lys ratios improved feed conversion and dressing percentage and reduced abdominal fat content; it could not be determined whether these responses were consistent with Arg per se or were due to a nonspecific N response. As increasing Lys levels or Arg:Lys ratios did not improve weight gain, increase breast meat yield, or attenuate adverse effects due to heat or cold exposure, it is concluded that the levels of Lys and Arg suggested for 21 to 42 d by the NRC are adequate for birds of this age under the environmental conditions encountered.en
dc.description.affiliationDepartment of Poultry Science University of Arkansas, Fayetteville, AR 72701
dc.description.affiliationFmvz/Unesp, 18618-000, Botucatu, SP
dc.description.affiliationUnespFmvz/Unesp, 18618-000, Botucatu, SP
dc.format.extent472-481
dc.identifierhttp://dx.doi.org/10.1093/ps/76.3.472
dc.identifier.citationPoultry Science, v. 76, n. 3, p. 472-481, 1997.
dc.identifier.doi10.1093/ps/76.3.472
dc.identifier.issn0032-5791
dc.identifier.scopus2-s2.0-0031093198
dc.identifier.urihttp://hdl.handle.net/11449/65050
dc.language.isoeng
dc.relation.ispartofPoultry Science
dc.relation.ispartofjcr2.216
dc.relation.ispartofsjr1,112
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectArginine
dc.subjectBroiler
dc.subjectCarcass
dc.subjectLysine
dc.subjectTemperature
dc.subjectarginine
dc.subjectlysine
dc.subjectaging
dc.subjectanimal
dc.subjectanimal disease
dc.subjectbird disease
dc.subjectbody composition
dc.subjectbody temperature
dc.subjectchicken
dc.subjectcold
dc.subjectdiet
dc.subjectdose response
dc.subjecteating
dc.subjectgrowth, development and aging
dc.subjectheat
dc.subjectmale
dc.subjectmeat
dc.subjectpathophysiology
dc.subjectphysiology
dc.subjectregression analysis
dc.subjectstandard
dc.subjectstress
dc.subjecttime
dc.subjectweight gain
dc.subjectAging
dc.subjectAnimals
dc.subjectBody Composition
dc.subjectBody Temperature
dc.subjectChickens
dc.subjectCold
dc.subjectDiet
dc.subjectDose-Response Relationship, Drug
dc.subjectEating
dc.subjectHeat
dc.subjectMale
dc.subjectMeat
dc.subjectPoultry Diseases
dc.subjectRegression Analysis
dc.subjectStress
dc.subjectTime Factors
dc.subjectWeight Gain
dc.titleInfluence of Dietary Lysine Levels and Arginine:Lysine Ratios on Performance of Broilers Exposed to Heat or Cold Stress during the Period of Three to Six Weeks of Ageen
dc.typeArtigo
dcterms.licensehttp://www.oxfordjournals.org/access_purchase/self-archiving_policyb.html

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