沙棘對(duì)中國(guó)亞濕潤(rùn)干旱區(qū)楊樹(shù)人工林生物量、光合生產(chǎn)力和水分利用率的影響研究.pdf

1、中國(guó)林業(yè)科學(xué)研究院森林生態(tài)環(huán)境與保護(hù)研究所博士學(xué)位論文沙棘對(duì)中國(guó)亞濕潤(rùn)干旱區(qū)楊樹(shù)人工林生物量、光合生產(chǎn)力和水分利用率的影響研究姓名：趙廣東申請(qǐng)學(xué)位級(jí)別：博士專業(yè)：生態(tài)學(xué)指導(dǎo)教師：劉世榮20020810AbstractInJianpingcountyLiaoningProvince，thedrysubhumidareaofNortheastChina，bythewayofstandssurvey，plantphysiologicaleco

2、logyandbiochemistryeffectsofseabuckthom(HippophaerhamnoidesL)onstandswaterstatus，biomassandstandproductivitybiologicalcyclingofnutrients，photosyntheticphysiologicalecologyandleafbiochemicalindexwereexaminedthroughintrodu

3、cingseabuckthomintotwopoplarstandsofdifferentvarieties(Poputuseuramericanecv‘N3016’andPoputus‘Xiaohei’)，andintwodifferentmixingdesigns(striporindividualmixingpatterns)Theobjectivesofthestudywere；todeterminethelongtermeff

4、ectsofseabuckthornonpoplargrowthandbiomass；andtoilluminatethechangingmechanismofnutrientavailabilityandbiologicalcycling，standswaters扭掘s，photosynthesisandwateruseefficiencyofmixingstands。Thestudywasexpectedtoprovidescien

5、tificinformationformaintenanceofsustainablesiteproductivityofpoplarplantationsundersuccessiverotationwithcontinuouscroppingTilemainconclusionswereasfollowing：1)Seabuckthornolinimprovethemicroclimateconditionsofpoplarplan

6、tationieincreasethestandairrelativehumidityandsoilmoistureofif20cmdepth，decreasethestandairtemperaturesoiltemperatureandwindspeed。InJuneandSeptemberthesoilwatercontentsof20120emofthemixingstandswere1678／o43，1％lowerthanof

7、pu摶stands。2)inJune2000，thenaturalwatercontentsandfreewatercontentsofPopul槲euramericanecv‘N3016’mixingstandsleavesdecreased202％and292％thanthatofiIspurestands；forthemixingPopulus‘Xiaohei’stands，thecorrespondingvaluewas202％

8、and292％；However，Theboundwatercontenlslfreewatercontentsnaturalsaturationdeficitcriticalsaturationdeficitandtheexten。ofwaterdemandsofthetwomixingstandswere232％，46，3％，120％，306％and357％，538％12，7％，364％higherthanitsowncorrespo