亚热带人工湿地中冬春草本功能群化学计量学研究_英文_牛晓音

ResearchonStoichiometryofEarly-springHerbsFunctionalGroupintheSubtropicalArtificialWetlandNIUXiao-yin1,2＊,CHANGJie2,GEYing2,ZHENGJia-wen11.CollegeofResourceandEnvironmentalEngineering,ShandongUniversityofTechnology,Zibo255049;2.CollegeofLifeScience,ZhejiangUniversity,Hangzhou310012Abstract[Objective]Theaimwastocarryoutstoichiometryontheearly-springherbsfunctionalgroupinsubtropicalartificialwetland.[Meth-od]UV-Visspectrophotometerwasusedforthedeterminationofnitrate-nitrogen,ammoniumnitrogenandphosphorusconcentrations.Potassi-umpersulfateabsorptiometrywasusedforthemeasurementoftotalNcontent,whiletheflamephotometerwasusedtodetectthepotassiumandsodiumconcentrationinplants.Allthenutrientdeterminationofplantsampleswererepeatedforfourtimes.[Result]Thefournutrientconcentra-tionsinalmostallsampleswereinthenormalrangeofnaturalplantnutritionconcentrations;inearly-springherbsfunctionalgroups,differentspeciesshoweddiversityonthenutrientconcentrations;plantheighthadnosignificanteffectonthenutrientconcentrationsinplants;thenutrientconcentrationsofnon-grassgroupplantswerehigherthanthatofgrassgroupplants;thenutrientconcentrationsoftheannualherbwerehigherthanthatofperennialherbs.[Conclusion]Thestudyhadprovidedbasisfortheunderstandingoftheeffectsofchangesinnutritionalconditionsonspeciesdiversity,communitystructureandsuccessionofthesystem.KeywordsEarly-springherbs;Functionalgroup;Biodiversity;Element;StoichiometryReceived:June17,2011Accepted:July25,2011SupportedbyNationalNaturalScienceFoundationofChina(30370146).＊Correspondingauthor.E-mail:zbnxy@sdut.edu.cnComparisonwiththeactivationofinternationalresearchesontheecologicalstoichiometry,ecologicalstoichiometryisstillnotreceivedextensiveattentioninChina[1].Agriculturalwa-ter-consumingandurbandevelopmentsbringabundantnutri-entstotheentireregion.Withtimeprolonging,thechangesinsoilnutrientcompositionandcontent,aswellastheeffectscausedtospeciescompositioninecosystemwillbecomein-creasinglyobvious.Therefore,itisnecessarytounderstandmoreaboutth