The effect of replacing rice straw with dry

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1、AnimalFeedScienceandTechnology125(2006)99110Theeffectofreplacingricestrawwithdrywormwood(Artemisiasp.)onintake,digestibility,nitrogenbalanceandruminalfermentationcharacteristicsinsheepY.D.Koa,J.H.Kima,A.T.Adesoganb,H.M.Haa,S.C.Kima,b,∗aFacultyofAnimalScienc

2、e,GyeongsangNationalUniversity,Jinju660-701,SouthKoreabDepartmentofAnimalSciences,UniversityofFlorida,Gainesville,FL32611,USAReceived4November2004;receivedinrevisedform14March2005;accepted10May2005AbstractThisstudyexaminedtheeffectofsubstitutingdrywormwood(

3、Artemisiasp.)forricestrawinsheepdietsonintakeandapparentdigestibilityinvivo,nitrogen(N)balanceandruminalfermen-tationcharacteristics.FourCorriedale×Polwarthsheep(51.7±1.3kg)wereindividuallyhousedinmetabolismcagesandfeddiets(ad.libitum)witha70:30foragetoconc

4、entrateratio(DMbasis),inwhichthebasalricestrawwassubstitutedwith0(Control),30(LW),50(MW)or100(HW)g/kgofdrywormwood.Theexperimentaldesignwasa4×4latinsquaredesigninwhich10daysofdietaryadaptationwasfollowedby6daysoftotalfecesandurinecollectionineachperiod.Rume

5、nfluidwascollectedfromastomachtubeat−0.5,0.5,1,2,4,and8hafterthemorningfeedonday6ofeachcollectionperiodandanalyzedforvolatilefattyacids(VFA).Theintakesofdrymatter(DM),organicmatterintake(OM),crudeprotein(CP),etherextract(EE),neutraldetergentfibre(NDF)andacidd

6、etergentfibre(ADF)werehigher(P<0.05)insheepfeddietscontainingwormwood,thanthosefedtheControldiet.ComparedtotheControldiet,CPdigestibilitywashigher(P<0.05)insheepfedMWandNintake,retainedN,EEdigestibility,urinarypurinederivativesandmicrobialNyieldwereAbbreviat

7、ions:ADF,aciddetergentfibre;CP,crudeprotein;DM,drymatter;EE,etherextract;HW,dietinwhichdrywormwoodwassubstitutedfor100g/kgDMofricestraw;LW,dietinwhichdrywormwoodwassubstitutedfor30g/kgDMofricestraw;MW,dietinwhichdrywormwoodwassubstitutedfor50g/kgDMofricestra

8、w;N,nitrogen;NDF,neutraldetergentfibre;OM,organicmatter;VFA,volatilefattyacids∗Correspondingauthor.Tel.:+13523922185;fax:+13523926572.E-mailaddress:kim@animal.ufl.edu(S.C.Kim).0377-8401/$seefrontmatter©2