edling

更新时间:2023-04-13 23:58:01 阅读: 评论:0


2023年4月13日发(作者:考研报名入口)

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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