西南巖溶地區(qū)典型植物的蒸騰光合特征及其對(duì)元素遷移的影響.pdf

1、華中科技大學(xué)碩士學(xué)位論文西南巖溶地區(qū)典型植物的蒸騰光合特征及其對(duì)元素遷移的影響姓名：劉彥申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：生態(tài)學(xué)指導(dǎo)教師：余龍江李為20070529IIAbstractThetranspirationacteristicsoftypicalplantVitexnegundoatdifferentgeomphologicalpositions(DepressionSlopeSaddle)thetranspirationphotosy

2、nthesiswateruseefficiency(WUE)acteristicsunderdifferentgeologicalbackground（limestonedolomitesstone），werestudiedcompared.ThedominantfactsthatinfluencedthetranspirationrateWUEwereanalyzed.Ontheotherhthemigrationacteristic

3、sofprimaryelementsatdifferentgeomphologicalpositionsthatunderdifferentgeologicalbackgroundwereinvestigated.ThecrelationbetweenmigrationoftheseelementsplanttranspirationwerestudiedexemplifiedbytypicalplantVitexnegundogrow

4、ninthestudyingarea.Someresultswereobtainedasfollows.(1)ThereweredifferencesindiurnalvariationoftranspirationrateofVitexnegundoamongdifferentgeomphologicalpositionsdifferentgeologicalbackground.Theaveragediurnaltranspirat

5、ionratesindifferentgeomphologicalpositionswereinsequenceasSaddleDepressionSlope.TheVitexnegundoinsstoneareahadhighertranspirationratebutlowerphotosynthesisrateWUEthanthatinlimestonearea.(2)Thedominantfactsinfluencingtran

6、spirationrateofVitexnegundowerestomatalconductanceairrelativelyhuityleaftemperature.Theinfluenceofstomatalconductancewasthegreatesttheinfluencingextentvariedwiththegeomphologicalpositions.ThefactsinfluencingtheWUEofVitex

7、negundoincludedtemperaturehuitystomatalconductanceCO2concentrationbuttheinfluencingextentvariedobviouslywiththegeologicalbackground.(3)Theinfluencedegreeofplanttranspirationonthemigrationaccumulationofthemajelementssucha

8、sCa，Mg，Cu，F(xiàn)e，MnZnvariedwithdifferentgeologicalbackgrounddifferentelements.TheplanttranspirationhadacertainpromotingeffectonmigrationoftheelementssuchasMnCuwhichweremedifficulttotransfer.Meovertheinfluencedegreeofmigratio

9、naccumulationofthemicroelementssuchasCu，F(xiàn)e，MnZnonplantabsptioncoefficientvariedsignificantlywithdifferentgeologicalbackground.Inkarstmountainareastheacteristicsofdifferent★SupptedbytheYouthFoundationProgramoftheNationalN