玉米各个生育时期地道英文表达方式

关于玉米各个生育时期地道英文表达方式第1页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentuckyHowaCornPlantDevelops,SpecialReportNo.48IowaStateUniversityPress$2.00ExtensionDistributionCenter

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Fax:(515)294-2945/pubs/Order.htmlThematerialinthispresentationcomesfromIowaStateSpecialReportNo.48.Thisisanexcellentresourceforanyproduceroragronomist.Allgrowthstagespresentedherearebasedon…第2页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentucky/corngrows.html#stages第3页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentuckyVegetativeStagesReproductiveStagesVEemergenceR1silkingV1firstleafR2blisterV2secondleafR3milkV3thirdleafR4doughV(n)nthleafR5dentVTtasselingR6physiologicalmaturity*Whenstagingafieldofcorn,eachspecificVorRstageisdefinedonlywhen50percentormoreoftheplantsinthefieldareinorbeyondthatstage./corngrows.html第4页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentucky第5页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentuckyVEHowaCornPlantDevelops,SpecialReportNo.48,IowaStateUniversity,1998DevelopmentofNodalRoots第6页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentuckyV3第7页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentuckyV3RoothairsbegintoformonNodalRoots.SeminalRootgrowthhasbasicallystopped.Growingpointisbelowthesoilsurface.Frostsonthesurfacewillnotkilltheplants.Freezingsoiltempswillkilltheplant.Floodingcankillplants.第8页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentuckyV6Tasseldevelopmenthasstarted.Earshootformationhasalsostarted.第9页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentuckyTobecertainaboutV-stagesbeyondV6:Splittheentirestalk(fromthetiptotheroots)

inhalfwithaknife.Thefirstfivenodeswillbeclusterednearthebottomofthestalkandthe6thnodewillbeveryclosetothesoilline.Countnodesabovethe6thnodetodeterminehowmanynodesarepresent.ThetotalnumberofnodesequalstheV-stageoftheplant.Forexample7nodes=V7corn.V6:

Typicallywhenlowerleavesbegintotearoffofstalk.第10页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentuckyV6NodalRootSystemistheprimaryrootsystemfornutrientsandwater.Growingpointisabovetheground.Earshoot.第11页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentuckyV6PrematureTassel第12页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentuckyV9第13页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentuckyV9Growthraterapidlyincreases.Greaterdemandfornutrientsandwater.Earshoot.Earshoot.Earshoot.Growingpoint.第14页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentuckyV12Bothkernelsizeandkernelnumberarebeingdetermined.Anylimitsonwaterornutrientsatthisphasewilldrasticallyimpactyields.Earliermaturinghybridswillpassthroughthisphasefasterthanlatermaturinghybrids.第15页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentuckyV15About10-12daysfromsilking.

Enteringthemostcriticalstageforyielddetermination.Theplantismostsensitivetowaterand/ornutrientstressatthisstage.Irrigation-the4weeksaroundsilkingarethemostcritical.第16页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentuckyV15Earshootsnearthetopoftheplantarestartingtoout-growearshootslowerontheplant.LowerpartofplantUpperpartofplant第17页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentuckyV18第18页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentuckyV18LowerpartofplantUpperpartofplant第19页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentuckyV18LowerpartofplantUpperpartofplant第20页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentuckyVT-TassleOccurswhenlastbranchoftasselisvisiblebutbeforesilksemerge.Mostsusceptibletohaildamageatthisstage.CompleteleaflossatVTwillresultinlittletonoyield.第21页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentuckyVT第22页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentuckyPollenshed第23页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentuckyR1-SilkingSilksstartingtoemerge.Nuptakeisrapid.Puptakeisrapid.Kuptakeisnearlycomplete.Watchforcornborerfeeding.Moistureisneededforpollination.第24页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentuckyR1-SilkingCobmaterialPrematurekernelTwotothreedaysarerequiredforallsilksonaneartobepollinated.第25页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentuckyR2-BlisterAnminiaturecornplanthasstartedtodevelopwithintheprematurekernel.Earsizeisnearlycomplete.Fertilizedsilksarestartingtodryout.第26页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentuckyR3-MilkKernelsarebecomingyellowontheoutside.Silksaredry.Kernelsareat80%moisture.Stressbecomeslessofafactoraskernelsstarttodrydown.第27页，课件共32页，创作于2023年2月GrainCropsExtension,UniversityofKentuckyR4-DoughFluidinthekernelisbecomingaconsistencysimilartodough.(70%moisture)Almost½ofthedryweighthasbeenaccumulated.Fiveembryonicleaveshaveformedinthekernel.Thesewillbethefirstfiveleavesofanewplantasitemergesnextyear.第28页，课件共32页，创作于2023年2月GrainC