a one dimensional model of water flow in soil plant systems based on plant architecture.pdf

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1、PlantSoil(2011)341:233–256DOI10.1007/s11104-010-0639-0REGULARARTICLEAone-dimensionalmodelofwaterflowinsoil-plantsystemsbasedonplantarchitectureMichaelJanott·SebastianGayler·ArthurGessler·MathieuJavaux·ChristineKlier·EckartPriesackReceived:25February2010/Accepted:29Oc

2、tober2010/Publishedonline:27November2010©TheAuthor(s)2010.ThisarticleispublishedwithopenaccessatSpringerlink.comAbstractTheestimationofrootwateruptakeanddimensional(3D)architecturalrepresentationofwaterflowinplantsiscrucialtoquantifytran-thetreecrownacorresponding3Dc

3、haracterisa-spirationandhencethewaterexchangebetweentionoftherootsystem.This1Dxylemwaterflowlandsurfaceandatmosphere.Inparticularthesoilmodelwasthencoupledtoasoilwaterflowmodelwaterextractionbyplantrootswhichprovidesthederivedalsofromthe1Dporousmediaequation.watersup

4、plyofplantsisahighlydynamicandWeapplythenewmodeltoconductsensitivitynon-linearprocessinteractingwithsoiltransportanalysisofrootwateruptakeandtranspirationprocessesthataremainlydeterminedbythenat-dynamicsandcomparetheresultstosimulationuralsoilvariabilityatdifferentsc

5、ales.Tobetterresultsobtainedbyusinga3Dmodelofsoilwa-considerthisroot-soilinteractionweextendedterflowandrootwateruptake.Basedondataandfurtherdevelopedafiniteelementtreehydro-fromlysimeterexperimentswithyoungEuropeandynamicsmodelbasedontheone-dimensionalbeechtrees(Fag

6、ussilvaticaL.)isshown,that(1D)porousmediaequation.Thisisachievedthemodelisabletocorrectlydescribetranspira-byincludinginadditiontotheexplicitthree-tionandsoilwaterflow.Inconclusion,comparedtoafully3Dmodelthe1Dporousmediaap-proachprovidesacomputationallyefficientalter

7、-native,abletoreproducethemainmechanismsofResponsibleEditor:AlexiaStokes.planthydro-dynamicsincludingrootwateruptakeM.Janott·S.Gayler·C.Klier·E.Priesack(B)fromsoil.HelmholtzZentrumMünchen,IngolstädterLandstr.1,85764,Neuherberg,GermanyKeywordsTranspiration·Planthydro-

8、dynamicse-mail:priesack@helmholtz-muenchen.demodel·Rootwateruptake·Europeanbeech·M.JavauxPorousmediaequationUniversitéCatholiquedeL