简介：Bymeasuringtheconcentrationofairanions,thermal-temperature,tree-coverageandbio-diversityinmajorcitygreenbeltinShanghai,thispaperanalyzedthecorrelativitybetweenaircleaningindexanditsinfluentialfactorsofthesecitygreenbelt,andfoundthatlessthan60%ofparks'concentrationofairinionsanionsarrivedatthegenerallevel.ThereisnegativecorrelationbetweenCI(aircleanindex)andthermal-temperature,andthereisnegativecorrelationbetweenCIandbio-diversitytoo.ThereisPositivecorrelationbetweenCIandtree-coverage.

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简介：Inordertofurtherresearchbamboocultivationandexpanditsapplicationfield,air-drieddensityandmechanicalpropertiesofMosobamboofromthe2plantationsunderthesamesiteconditionweremeasuredandanalyzedbyusingthenationalstandardTheTestingMethodsforPhysicalandMechanicalPropertiesofBamboo(GB/T15780-1995).Andthesinglelinearregressionanalysiswascarriedout.Theresultsshowedthatair-drieddensityandmechanicalpropertiesofthe2kindsofMosobambooincreasewith...

简介：TheimpactsofelevatedtemperatureandCO2onyoungsilverbirch(BetulapendulaRoth)saplingsafter0,25,50or75%artificialdefoliationwereassessedbymeasuringplantheightanddrymassofabovegroundcompartmentsandrootsandvariousmorphologicalandphysiologicalvariables.Defoliationeitherincreasedordecreasedplantgrowthdependingontheseverityofdamageandtheclimatictreatment.At21Cand400mgL-1CO2,defoliatedplantswerenotabletocompensateforthelostfoliage,butgrowthcompensationandadaptationtothechangedconditionsweregreater;growthofyoungdefoliatedsilverbirchsaplingsincreased,whichledtoincreasedheightandatendencytoenhancefinalabovegroundandrootbiomassandleafnitrogenandcarboncontentcomparedtothenondefoliatedcontrols.Nevertheless,theshort-termeffectofthedifferentclimaticconditionsdidnotresultinasignificantovergrowthofdefoliatedplants.AslightincreaseintemperatureandCO2werethemostacceptableconditionsfordefoliatedplants;however,a4CincreasewithcorrespondinglyhigherCO2wasmorestressfulasshownbylessgrowthinheightandbiomassallocationtoleaves,stemsandroots.Thefindingsfromthepilotexperimentaremoreapplicabletoyoungbirchtrees,butstressonyoungtreesmaybereflectedinfuturetreegrowth.