喷施微肥对夏玉米结实能力的影响的研究

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1、StudiesonSummerMaizeKernelSettingCapacityatDifferentMieroelementFei'ti[izerT心atmentsPostgraduate：Jia．gYaliM面ECropCultivationandFarmingSystemSupervisoE．2五angFeng-lu(professor)Abs仃act11圮morphologyandphysiologicalcharacteristicsofkerneldevelopment,kernelsettingcapacityatdifferentanthesis-silkingi

2、nterval(ASl)andtheeffectofmicroelementfertilizers(zinc,manganese,boron,)ORSUalllllermaizegrowthanddevelopmentkernelsettingrateWCl'econductedusingnongdal08asexperimentalmaterial．11”resultswouldhelptoprovidekeyfactoraffecting$1mnllermaizegrowthanddevelopment,andeffectsonkernelsettingcapa嘶bydiffe

3、rentmicroelementfertilizers．n伦resultswereshowed弱follows：1．ThemostrapidmatteraccumulationWaSappearedal12to28dayafteranthesis(DAA)duringthekerneldevelopment．AndthisperiodWaSalsoakeypenoafordrymatteraccumulationandyieldformation．Duringthekernelsettingpenedtheyallshowedafastincreasingtrendonkernel

4、ovarysize9freshweight,dryweightandvolume．AndthereWaSasignificantpositivecorrelationbetwc∞kernelweightandvolume．Changesofkerneldevelopment缸differentearpositionswerealsocheckedanditshowedthatmiddlekernelsworebetterthanupperkernelsonlengthofovary,fleshanddryweight,andvolume．Thatalsomoal岱thekernel

5、sinkstressandsinkactivityofmiddlekernelsw讹betterthantheupperones．Thatmaybeareasonofupperkernelshadahighabortedrate．2．Tbecontentsofsolublesugar,proteinandstarchofthekernelandcobwerecompared．Theresultindicatedthattherewereasimilartrendbetweenkernelandcobwithin12dayafteranthesis(DAA)．After12DAAth

6、estarchcontentincreasedrapidlyinthekernel．however,itWasrelativelydecreasedinthecob．111econtentofsolublesugarkepthi曲inthekernel，butdecreasedrapidlyinthecob．Duringthewholekerneldevelopment,theproteincontentofthekernelwashigherthanthatofthecob．Itwasestimatedthatthesolublesugarofcobwastransportedt

7、okernelandconvertedtostarchorproteinafterthe12DAA．3．1hccontentofsolublesugar,proteinandstarchofthekernelandcobindifferentpartsofthe啊haddifferentchangingh'ends．but12DAAisakeydayofthephysiologycharacteristics,allofthethreeindexeshadchange