兩個(gè)不同穗型冬小麥品種根系活力變化與產(chǎn)量形成的差異研究.pdf

1、中國農(nóng)業(yè)大學(xué)碩士學(xué)位論文兩個(gè)不同穗型冬小麥品種根系活力變化與產(chǎn)量形成的差異研究姓名：王志芬申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：植物營養(yǎng)學(xué)指導(dǎo)教師：張福鎖2002.6.1AbstractThebigspikecultivarsofwinterwheathadbeenutilizedextensivelyinproductionDuetothecultivationofbigspikecultivarsonlydependingontheresearc

2、hresultsofmulti。spikecultivarstheunstableproductionsoccurredveryoftenInthestudyrootsactivitydynamicsandyieldformationbetweentwospike—typecultivarsofwinterwheatwerecomparedinordertoprovidesomescientificbaseforitssoreeingc

3、hoicesandmanagementThreeexperiences，usingthemethodsofplotandpotandtechniquesofradiotracerandphotosynthesismeasurement，werecarriedoutwithbig—spikecultivar(Lumai783)andmultispikecultivar(Lumail4)inInstituteforApplicationof

4、AtomicEnergy，ShandongAcademyofAgriculturalSciencesfrom1999to2001Themainresultswereshownasfollows：1PopulationbuildingandyieldformationThemarkeddifferencesofpopulationbuildingandyieldfactorsbetweentwocultivarsexistedThespi

5、kenumbersperplantofmultispikecultivarformedintheend，whichwasmorethanthatofbigspikecultivarresultedinhigherspikenumbersperunitareathanthatofbig—spikecultivars，SignificantlyAlthoughthegrainnumberperspikeofthebigspikecultiv

6、arwasmore，thegrainnumberperunitareaofbigspikecultivarwasmarkedlylessthanthatofmulti—spikecultivarThebigspikecultivarhadhighgrainweightpotential，buttheweightper1000grainsbetweentwocultiavrshadlittledifferenceunderplotcult

7、ureAsresult，theyieldofbigspikecultivarislowerthanthatofmulti—spikecultivar2PhotosynthesisThecanopyphotosynthesisrateofbig—spikecultivarwassignificantlyhigherfromemergenceofseedlingtoelongationstage，andthenloweruntilthema

8、turitythanthatofmulti—spikecaltivarThebigspikecultivarmarkedlysurpassedthemultispikecultivarinthesinglestemphotosynthesisrateafterelongationstage，whichsuggeststhatbigspikecaltivarneedhighersinglestemphotosynthesisratefor

9、thegrowthanddevelopmentofspikeandgrainbuilding3AbsorbingactivityofrootsThetrendsofpopulationrootabsorbing’2PactivitybetweentwocultivarsappearedsynchronousbeforeanthesisorasynchronousafteranthesisTheclimaxofpopulationroot

10、absorbing’2Pactivityofthebigspikecultivarwasearlierabout10daysthanthatofmultispikecultivarduringfillingstageThepopulationrootabsorbing”Pactivityofthebig—spikecultivarwasmarkedlyhigherbeforeelongationstageandsignificantly

11、lowerfromelongatingtomaturitythanthatofmultispikecultivarTherootabsorbing32PactivityperavailablestemofbigspikecultivarwasmarkedlyhigherthanthatofmultispikecultivarexceptthestartoffillingHowever，therootabsorbing32Pactivit