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1、-.-JRBIRDFOCUSEDPOULTRYFARMINGAPRACTIBIRDFOCUSEDPOULTRYFARMINGoRuis•JosHeijmans•KoosvanMiddelkoopLOUISBOLK~STITUJTLIVESTOCKRESEARCHWAGENINGENlii;M1PUBli$HER$CreditsPoultrySignalsEditorJanHulsen.VetviceGroepRoodbontPublishersB.V.P.O.Box4103.NL-7200BCZut:phE~.fl"''AuthorsTelephone:+31(0)57
2、5545688MonlqueBestmanFax:+31(0)575546990MarkoRuisE-mail:info@roodbontnllosHeijmansInternet:www.roodbont.comKoosvanMiddelkoopLOUUBOLKFinaleditingINSIIrVU"'ITonvanSchieEnglishTranslationHoofdstraat24Agrolingua3972LAPhotographyPhotographyCover:MarcelBekkenPhotography(unlesscreditedotherwise)L
3、ouisBolklnstituut,LivestockResearchWageningenUR.GDOtherphotographs:Alpharma(107bl.107brl.Aviagen(88bl,88br),MarcelP.O.BoxBekken(cover),CBennet(44r),MarcelBerendsen(achter·8200ABzijdeb.4.8b.9tr.lit,24t,24b,25.26r,27tl,341.(0)32023823845br,45t,481.48tr,49(6,71.54b,55tl,23805058bm,58br,59,601
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5、nter.com'etveld,ErikdeBruin.VarwigDesignSpecialTheauthorsandpublisherhavecompiledthispublicationwiththePetervant.MarleenBoerjan,PieterBouw.~tijndertgreatestcareandtothebestofourknowledge.However,theauthorsvandenBnnk.HilkoEllen,RickvanEmous.Marritandpublisherdonotaccep1anyliabilityduetodama
6、geofanykindvanEngen.TeunFabri.TheaFiks.NielsGeraerts.ArjanresultingfromactionsandfordecisionsbasedonthisinformationGussinklo,JanvanHarn,WimHoeve,JanHulsen.IngrideRoodbontPublishersBVNO'ember2010delong.ReneK1eltenbelt.GerjanKlok.CecileKorevaar.Nopartofthispublicationmaybeduplicated,photoco
7、piedreprint•MarinusvanKnmpen,PieterKruit,lanenMarcelKuijpers,edorreproducedinanywaywithoutpriorwrittenpermissionfromthepublisherFerJYLeenstra,SanderLourens.lacMatijsen.MoniqueMul,Bertvan~ijhuis.KeesvanOoijen.WimPeters.DrISBN978-90-8740-079-8DavidPollock,Bianca
