川西亞高山冷杉林樹干液流變化與蒸騰量估測(cè)研究.pdf

1、Y906‘lS分類號(hào)密級(jí)S71855GK南京林業(yè)大學(xué)學(xué)位代碼307學(xué)校代碼10298學(xué)號(hào)030026論文題目：川西亞高山冷杉林樹干液流變化與蒸騰量估測(cè)研究作者：鄧勇專業(yè)：生態(tài)學(xué)研究方向：森林水文生態(tài)學(xué)指導(dǎo)教師：薛建輝教授二oo六年六月StudyoⅡchangesofsapnowdensityandtheevapotranspirationofthefirstandsintheupperreachesofMinjiangRiVer，Sic

2、huanProVinceAbstractByusingICT2000TE(TranspirationEnvironment)measufementsystemwhichwasdesignedonbasisofThermalDissipationMethod，thesapnowdensity(SFD)ofmainarborspecies(46f已Jf(ⅨD“f口肝口，Bef“Zdp，日卯，紗，，口aⅡd胄矗D如c把聆dpD撐6口Z口HgP

3、仃JP)andenvironmentalfactorswerestudiedduringgrowingseasonsin2004and2005iⅡupperreachesofMinjiangareaMeanwhile，theSFDVarietyinradialsapwoodandwholetreeevapotranspirationintensityof爿fdx。珂f口，7口andthestandwaterusewereinvestig

4、atedMajorconclusionsaredescribedasfollows：ThediurnalvaIietySFDofthearborspecieswerealtemateindaytimeandnighttimeandexhibitedmono—peakpatternsIndiff色rentseasons，theSFDOf爿f矗工onf口H4andBpZ口句Ep矗yZf口hadrelativelynotablefluctua

5、tionBasedonregressionanalysisandgreyrelationshipanalysis，thefhnctionmodelsbetweenenVironmentalvalueandSFDofthethreetreeswereestablishedThesolar豫diatioⅡwasthemostsign訊canteⅡvironmentalfactortoSFD，andthpnwereairtemperature

6、‘a(chǎn)ndairrelativehumidityTheroleofsoilwatercontent，soiltemperatureandrainfaUwererelativelyinsignmcantTherewasacloserelationa而ongtheSFDofdifferentpointsinradialpositionsofsapwoodOntheotherhand，therewasnodissinctregulationof

7、theSFDindifIerentdimensionsofthestemandthediameteratthebreastheightThroughdyeingxylembyFeCl3，thefunctionmodelbetweensapwoodthickness(SwT，cm)anddiameteratthebreastheight(D，cm)wasestablished(51WT=1572lflD一203)AⅡdthenthefun

8、ctionofcalculatingthewholetreeeVapotranspirationquantitywas：F。。t_4686Fd3‘(D—1)，F(xiàn)j。=7054Fd3【4596D25564596D(1572lnD203)o2“2556(1572lnD一203)o782】，F(xiàn)=FoutFinThestandwaterusemodelwasestablishedfromwholetreewateruseandtheDBHdis