امید علی اسماعیلی پور

This studywasconductedtostudytheeffectof Withania coagulans (WC)fruitpowderand vitaminC(VC)ongrowthperformanceandsomebloodcomponentsinheatstressed broilers. Theexperimentwasconductedasa2
3 factorialarrangementoftreatments with2concentrationsofVC(0and250mg/kgofdiet)and3concentrationsofWC(0,2.5, and 5g/kgofdiet).Eachof6dietarytreatmentswasfedto4replicatepens(9broiler chickens/pen)from25to42dofage.Thehousetemperaturewassetat34 1C72 (from 0900to1700h)throughouttheexperiment.Feedintake(FI),bodyweightgain(BWG), and feedtogainratio(F:G)werecalculatedattheendoftheexperiment.Atd42ofage, the bloodsampleswerecollectedfrom1broilerchickenperpen,andglucoseand cholesterolconcentrations,whitebloodcell(WBC)count,andactivityofglutathione peroxidase(GPX)weredetermined.TheFIandBWGincreasedby5.5%and12.7%, respectively,andF:Gdecreasedby6.5%withVCsupplementation(Pr0.01).Asdietary inclusionofWCincreasedfrom0to5g/kg,bothFIandBWGincreasedby5.6%(linear, Pr0.023).TheactivityofGPXincreased(Pr0.05) by20.57%withadditionofVCtothe diet, whereasnoeffectofWCwasobserved.NeitherVCnorWChadeffectonblood cholesterolandglucoseconcentrations,WBCcounts,relativeweightofbursaofFabricius, spleen,andliver,andrelativelengthoftheduodenum,jejunum,andileum.Itisconcluded that dietarysupplementationof250mgVC/kgor5gWCfruitpowder/kgimprovedthe growth performanceofheatstressedbroilerchickens.