寧夏干旱沙漠區(qū)沙坡頭鐵路防護(hù)林樹種引種調(diào)查研究.pdf

1、中國(guó)農(nóng)業(yè)大學(xué)碩士學(xué)位論文寧夏干旱沙漠區(qū)沙坡頭鐵路防護(hù)林樹種引種調(diào)查研究姓名：曹建軍申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：農(nóng)業(yè)推廣種植業(yè)指導(dǎo)教師：孟昭清蔣全熊20060601ShelterbeltsinShapuotaohaveperformancedwellsince1980Howeverstresstoleranceandsteadinessdiminishgraduaflyduetotheagingofshelterforestsandtheha

2、rmofAnoplophoraglabripennisMotschaswellasthesingletreespicesThusitisnecessarytointroducemanynewtreespeciestenewtheoldspeciesThisisconsjstentwiththenaturalsuccessionofShelterbeltsWhentherailwayshelterbeltsarerenewed，there

3、arcmanyadvantagesForinstance，itcouldnotonlyendchthespeciesdiversityandimprovetheabilitytoreducewindspeedanddogoodtosandfixation，butalsoenhancethetolerancetopest，cold，droughtFurthermore，itstrengthenstheecologicalconstruct

4、ionofShapuotou，whichprovideasafetytailwayfromBaotoutoLanzhouandimprovetheecologicallandscapearoundtherailway12treespecieshavebeenintroducedtoirrigatingshelterbeltsnearmilwayinShapuotouAfterplanting13years，treephenologygr

5、owthparameters，coldanddroughttolerance，insectanddiseaseresistance，trunkhavebeenstudiedResultsshowedthat：(1)Introductionofshelterbeltsimprovestheabilitytoresistbadlyenvironmentandgreatlyenrichestreespeciesdivemityprovides

6、shelterstograss，shrubs，wildanimalsandmicroorganismIntheend，theintroductionacceleratesthedevelopmentofbiologicaldiversityinSbapotouareaThecomplexeffectsofmanytreespeciesenhancesthecapabilityofshelterbeltstesistbadlyenviro

7、nmentTherefore，forestbecomemoresteadiness(2)21specieswereintroducedtoshelterbeltsinShapuotounearrailwayswhichcanbeirrigatedAfterphenologyobservation，itisfoundthattheperiodbetweenburgeonanddormancyofbudswasfromMarch1sttoN

8、ovember22stWithintheperiod，manytreespeciescouldshowdifferentphenologywithchangingofseasonMosttreesadaptedtotheclimateinShapuotouOnlyPopulusdelc￡Nankangldidnotadaptedtotheclimatethere(3)Basedontheobservationofgrowthparame

9、ters，coldanddroughttolerance，insectanddiseaseresistance，aswellastrunks，differenceswerefoundbetweenthesetreespecies(4)Assessedbyplantheight，diameteratbreastheightandbulkoftimberexcellentspeciesincludedPopuluseuphrafica，Al

10、biziaJulibrissinDurazz，F(xiàn)irmianasimplexetc(5)Assessedbydroughtandcoldtolerance，pestanddiseaseresistance，excellentspeciescontained$ophorzjaponica，～japonicaLvatendzJzLoud，Prannspersfca—atropurpurezFormqualitysuchasStraightd

11、egreeoftrunk，Orbiculardegree，VegetalpotentialofexcellentspecisisSophorajaponica，XjaponicaLvarPenduJaLoud，PopulusboJleanaetc(6)Threeclassificationwereselectedfromthe21defoliatetreesaccordingtogrowth，tolerance，andformquali

12、tyWehaveusedTheFuzzyGroupAnalysistoevaluatethecomplexperformanceofIntroductionspeciesAsaresult，18specieswereselectedforthisareaItprovideascientificfoandationtoshelterbeltsconstructionindroughtareainShapuotouKeywords：drou