29774.不同載畜率下荒漠草原植物群落優(yōu)勢種群分布格局研究

1、內蒙古農(nóng)業(yè)大學碩士學位論文不同載畜率下荒漠草原植物群落優(yōu)勢種群分布格局研究姓名：慕宗杰申請學位級別：碩士專業(yè)：生態(tài)學指導教師：蒙榮20090501StudyonDominantPopulationsDistributionofPlantCommunityinDesertSteppeunderDifferentStockingRatesAbStractPopulationsdistributionpatternisakeypointfor

2、grazingecologyresearch，theresearchwasconductedwith15plantspopulationsunder4stockingsatesbasedonthelongtermsurveyofStipabrevifloraindesertsteppeinSiziwangBanner，InnerMongolia，usingTtestofdiffusioncoefficient，meancrouwding

3、intensity，clumpingindex，patchinessindex，GREENindex，CASSindextostudythepatterndistributiontypes，patternscaleandclumpintensityofStipabrevifloraunderdifferentstockingratesandtheeffectofthepatterndistributiontypes，patternsca

4、leondifferentstockingratesThemainresults：1)Populationspatialpattern：15desertplantpopulationspresentedthedistributionofseparating，exceptAstragalusscaberrimusinNorthsouthdirectioninthecontrolpresentingauniformdistribution；

5、inligbtstockingarea，CaraganastenophyllapresentedauniforrndistributioninWestEastandNorthSouthdirections；inheavystockingarea，AstragalusscaberrimuspresentedauniformdistributioninWest—East；2)Populationpatternintensity：15plan

6、tpopulations，populationpatternintensitypresentedrangingdifferencesunderdifferentstockingratesanddirections，byincreasingstockingrates，theCleistogenesmutica，Convolvulusammannff，ArtemisiafrigidaandSalsolacollinabecamethemai

7、ndominantpopulations；3)Populationpatternscale：ItpresentedseparationdistrbutioninWestEastdirectionforStipabreviflorainthecontrolandheavystockingarea，Convolvulusammanniiintheheavystockingarea，Cleistogenesmuticainthelightst

8、ockingareaandSalsolacollinaintheheavystockingarea；Stipabreviflorainthelightstocking，ArtemisiafrigidaandSalsolacollinaintheheavystockingintheNorthSouthdirection；4)Correlationanalysis：ThereWasapositivecorrelationbetweenmea