蘭州本土地被植物調(diào)查與白草生態(tài)生物學特性研究.pdf

1、蘭州大學碩士學位論文蘭州本土地被植物調(diào)查與白草生態(tài)生物學特性研究姓名：高飛翔申請學位級別：碩士專業(yè)：草業(yè)科學指導教師：張自和20080601蘭州大學碩士學位論文蘭州本土地被植物調(diào)查與白草生態(tài)生物學特性研究AbstractWiththeincreaseingreenarea，waterconsumptionisalsogrowing，theshortageofwaterresourcesismoreandmoreserious，espec

2、iallyforthecitieslocateontheNorthinChina，ithasbecomeanimportantlimitingfactorinsustainabledevelopmentofsocio—economicandecologicalenvironmentTherefore，ascientificconceptshouldbeestablishedIthasbecameahottopictousethenati

3、vegroundcoverwhichhashi【ghadaptabilityanddrought—tolerantcapacityThestudyhasbeenconductedaninvestigationandevaluationonthemaingroundcoverplantiIlLanzhouCity，andapartofecologicalandbiologicalcharacteristicsofPennisetumcen

4、trasiaticumtwelwereconducted，theresultswasfollows(1)Groundcoverplantshaveverylargevalueforapplicationandpromotion，accorddingtoinvestagation，werecommendthattheexcellentandpotential25kindsofgroundcoverplantsshouldbedevelop

5、edandusediIllanzhou(2)Inthedifferentconditions，thegerminationrateofthePennisetumcentrasiaticumTzvelwasnotsignificantlydifferent，butthegerminationindex，theactivityindex，theradiclelengthandthefreshweightofPennisetumcentras

6、iaticumTzvelisdifferentunderdifferenttemperatures，thePennisetumcentrasiaticumTzvelhasthebestgerminationat25“C(3)IntheentirereproductivegrowthperiodofPennisetumcentrasiaticumTzvel，theallocationrateofthebiomassinPennisetum

7、centrasiaticumforitsrhizomeandvegetativegrowthwasmuchhigher，andthatforsexualgrowthWaslessTheratioofthebiomassofleaf，vaginaandshootwaslargeduringreproductivegrowth(4)ThecoefficientofvariationofsexualreproductiontraitsofPe

8、nnisetumcentrasiaticumwasasfollows：sseedweightofsinglespikenumberofseedsettingseedsettingpercentageweightofspikenumberoffloretlengthofspikethousandseedweightLengthofspike，numberoffloret，numberofseedsettingandweightofspik