基于GIS的害蟲發(fā)生影響因素分析及森林生態(tài)環(huán)境質(zhì)量評價.pdf

1、河北農(nóng)業(yè)大學(xué)碩士學(xué)位論文基于GIS的害蟲發(fā)生影響因素分析及森林生態(tài)環(huán)境質(zhì)量評價姓名：趙勇強(qiáng)申請學(xué)位級別：碩士專業(yè)：森林保護(hù)指導(dǎo)教師：高寶嘉20050606AnalysistotheecologicalfactorsaffectedoiltheforestpestandevaluationofforestecologicalenvironmentqualitybasedOHGISSpeciality：ForestryProtectionP

2、ostgraduate：ZHAOYongqiangDirectionofstudy：InsectsecologyAdvisor：ProfGaoBahiaAbstractDendrolimussppwasoneofthemainpestsintheHeBeiprovince，theycouldweakenthegrowthofthepinustabulaeformisCart，affectforestecologicalenvironme

3、ntSotheharmextentofDendrolimustabutaeformisandDspectabitiswereinvestigatedinthehighaltituderegion，hillregionsandplainregionInthispaper，therelationshipbetweentheoccuiTencedegreeofpestsandtheecologicalgeographyfactorswasan

4、alyzed：accordingtotheapplicationofgeographyinformationsystemintheresearchofplantpestsanditspeculiarspatialanalyticalfunction，combiningwiththecharacteristicsoftheplantpestsandrelatedstatisticalmethods，theapplicationoftheg

5、eographyinformationsysteminthemanagementofplantpestswerefurtherquestedGeographicinformationsystemandAnalyticalhierarchyprocesstwhichwereappliedinappraisingforestyecologicalenvironmentqualitytwhichcanofferscientificreliab

6、lefoundationbasisforforestresourcedevelopmentandreasonabusingAccordingtothemultianalysisbetweentheecologicalfactorsandtheharmextentofthepestthemodelwassetup，aodtheanalyticalresultwasveryprominenceAccordingtothelineregres

7、sionanalysisandstepwiseregressionanalysisthemainfactoraffectedthehamextentoftheDendrolimustabulaeformisandDspectabiliswasdifferentindifferentregions，themainfactorsarealtitude、crown—diameterandCrowndensityinluanpingcounty

8、，qianxicountywerecrowndensityrcrowndiameterandslope：qinglongcountywereCrowndiameterandforestdensity；changlicountywereforestage，Crownheight，theanalyticalresultwasveryprominence，inaword，thestandfactorsweremoreinfluentialth

9、angeographyfactorsByoverlayanalysis，indifferentregions，thedifferentecologicalfactorshaddifferentaffectingextentindifferentregions，theresultwasthat：intheareasofslopemorethan25。，crown—densitymorethan08，forestydensitymoreth

10、an2500ineachhectare，crown—diametermorethan2，5mandtressnumbermorethan15，fhepestisnoteasilyoutbreak；otherwisethepestiseasilyoutbreakiftheforestyisnothealth’thecommunitiesofinsectsandvegetationwereinvestigatedinthedifferent

11、regions，providingreferenceofevaluationofforestyecologicalenvironmentqualitytheresultwasthat：mostoftheinsect’speciesandplant’specieswerealmostthesamethemainspeciesoftheinsectswereLepidopteraandCofeoptera，thetwoitemsoccupi

12、edmorethan40percentofalltheinsectcommunityThespeciesoftheinsectwerethehighestinluanpingcounty，thenumberis34theshan—wienerindexoftheinsectcommunityinqianxicounty，whichis18724，theratioofpestandnaturalenemywasthesmallest(2，