Growth_stage_of_rice_plant(⽔稻⽣长阶段_全英⽂版)
TableOfContents
TABLEOFCONTENTS(1)
OVERVIEWANDOBJECTIVES(2)
THREEGROWTHPHASES(2)
GROWTHSTAGES0-9(3)VEGETATIVEPHASE(8)
Stage0-Germinationtoemergence(8)
Stage1-Seedling(9)
Stage2-Tillering(11)
Stage3-Stemelongation(14)REPRODUCTIVEPHASE(17)
Stage4-Panicleinitiationtobooting(17)
Stage5-Heading(20)Flowering(21)
RIPENINGPHASE(24)
Stage7-Milkgrainstage(24)
Stage8-Doughgrainstage(26)
Stage9-Maturegrainstage(27)PRINTVERSION(29)
PERIOD/GROWTHPHASES(29)OverviewandObjectives
ormationprentedisbadonthedataand
characteristicsofIR64,amodern,hi中华经典故事 gh-yielding,midwarfvariety,ferenceguidewillenableyouto:
recognizethe3basicgrowthphasofthericeplantandthestagesofdevelopmentineachpha.
imberinthescalecorrespondstoaspecificgrowthstage.
rowthphas
Thegrowthofthericeplantisdividedintothreephas:
tive(germinationtopanicleinitiation);
uctive(panicleinitiationtoflowering);ng(floweringtomaturegrain)
Inthetropics,thferencesingrowthdurationaredeterminedbychangesinthelengthofthevegetativepha.
Forexample,IR64whichmaturesin110dayshasa45-dayvegetativepha,whereasIR8whichmaturesin130dayshasa65-dayvegetativepha.
Growthstages0-9
tagesarenumberedanddescribedasfollows:Stage0isfromgerminationtoemergence:
Stage1iscallededling:
Stage2,tillering:
andStage3isstemelongation:
Thefirst4stagesmakeupthevegetativepha,4ispanicle临界资源 initiationtobooting:
Stage5isheadingorpanicleexrtion:
andStage6isflowering:
Stages4,5,and6constitutethereproductivepha,7isthemilkgrainstage:
Stage8,thedoughgrainstage:
andStage9,thematuregrainstage:
Stages7thro励志文字 ugh9correspondtotheripeningpha,tivePha
Stage0-Germinationtoemergence
Seedsareusuallregerminationtheradicleandplumuleprotrudethroughthehull.
Bythecondorthirddayafteredingintheedbed,ofstage0showstheemergedprimaryleafstillcurledandanelongatedradicle.
Stage1-Seedling
Theedlingstagestartsthisstage,minalrootsanduptofiveleavesdevelop.
Astheedlingcontinuestogrow,continuetodevelopattherateof1every3-4daysduringtheearlystage.
Secondaryadventitiousrootsthatformthepermanentfibrousrootsystemrapidlyreplacethetemporaryradicleandminalroots.
dlin十年歌词 ghas5leavesandarapidlydevelopingrootsystem.
Stage2-Tillering
Thisstageextendsfromt回心转意什么意思 heappearanceofthefirsttilleruntilthemaximumtillernumberisreached.
Tillermergefromtheaxiliarybudsofthenodesanddisplacetheleafastheygrowanddevelop.
Thidlingshowsthepositiono童年趣事 fthetwoprimarytillerswithrespecttothemainculmanditsleaves.
Afteremerging,cursabout30daysaftertransplanting.
etillersizeandcanopydevelopmentduetoincreadleafingandtillerdevelopment.
Besidesnumerousprimaryandcondarytillers,newtertiarytillersarifromthecondarytillersastheplantgrowslongerandlarger.
Bythisstage,thetillescontinuouslydevelopastheplantentersthenextstagewhichisstemelongation.
Stage3-Stemelongation
Thisstagemaybeginbeforepani,theremaybeanoverlapofstages2and3.
Thetillerscontinuetoincreainnumberandheight,coverandcanopyformationb白色代表什么 ythegrowingplantshaveadvanced.
thisrespect,ricevarietiescanbecategorizedintotwogroups:theshort-durationva小草千字文 rietieswhichmaturein105-120daysandthelong-durationvarietieswhichmaturein150days.
Inearly-maturingmidwarfslikeIR64,thefourthinternodeofthestem,belowthepointwherethepanicleemerges,elongates
ideshowsstemswhichhavebeendisctedtoshowthelengthofthefourthinternodeatthepanicleinitiationstage.
Maximumtillering,stemelongation,andpanicleinitiationoccuralmostsimultaneouslyinshort-durationvarieties(105-120days).
Inlong-durationvarieties(150days),thereifollowedbystemorinternodeelongation,andfinallybypanicleinitiation.
ReproductivePha
Stage4-Panicleinitiationtobooting
Theinitiationofthepanicleprimordicle
stage,3leaveswillstillemergebeforethepaniclefinallyemerges.
Inshort-durationvarieties,renbydisctingthestem.
Asthepaniclecontinuestodevelop,thespikeletsbecomedistinguishable.
Theyoungpanicleincreasinsizeanditslgingoftheflagleafsheathiscalledbooting.
Bootingismostlikelytooccurfirstinthemainculm.
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