,petewithwaterandnutrients,therefore,(N)andphosphorus(P)isthemostimportantrestrictiveelementsinforestecosystem,andinteractionbetweeneachother,,moreandmoreresearchaboutnitrogenandphosphorusfertilizeronabsorbingnutrientandforesttreesproductivity,-agehillsandmountainsfirplantationasthestudysiteobject,in2011,withtwokindoflevelsofNadded(5and10gm-2a-1),alevelofPadded(5gm-2a-1),pletelyrandomizedblockinsitufieldstudy;in2012and2013growingseasonandnon-growingseasonsurveyunderstoryplantdiversityandbiomassinthedetermination;in2013growingseasonandnon-growingseasonrandomlycollectedeightmajorunderstoryplantleavesorundergroundpartsofplantsin30plots,NandPcontentsweremeasured;understoryplantdiversity,biomass,nutrientconditionschangeafterevaluationandmainunderstoryplantnutrientresponsepatternandtheInnerAssociation,:Thefirstyearafterfertilization,phosphorusfertilizationincreasedtheunderstoryplantspeciesrichness,evennessindex,Shanon-Wienerindex,nitrogenfertilizerhadnosignificanteffect;thesecondyear,-,thediscoveryofthesecondgrowingseasonunderstoryplantbiomasswassignificantlypositivelycorrelatedwithspeciesrichness,,
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