城市园林绿化企业资质核准信息系统ppt课件.ppt

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1、PlantPropagationBy:JohnnyM.JessupAgricultureTeacher/FFAAdvisorIntroductionWhatisplantpropagation?Thereproductionorincreasinginnumberofplants.Canbedoneinoneoftwoways….Sexual.Asexual.SexualorSeedPropagationSexualPropagationThepropagationorreproducingofplantsfromseeds.SexualPropagationPollenistr

2、ansferredfromtheanthertothestigma.Fertilizationoccursandseedsareproduced.PartsoftheSeedPartsoftheSeedSeedsaremadeupof3mainparts….SeedCoat.Endosperm.EmbryonicPlant.PlantingSeedsPlantingdepthdependsonthesizeoftheseeds.Thelargertheseed,thedeeperitisplanted.Example:Petuniaseedsareplantedshallower

3、thanbeans,tomatoes,ormarigoldsbecausetheyarethesmallest.Smallseedsshouldbewateredbybottomsoaking.PlantingSeedsSeedsaredirectlyseededwhentheyareplantedinthesoilwheretheywillgrowtoasaleablesize.Germinationflatsareusediftheyaretobetransplantedatalatertime.Whenreusinggerminationflats,besuretoster

4、ilizetheflatsandsoil.GerminationGerminationrateisthe%thatsprout.Example:75outof100=75%Ratesaffectedby….Seedviability.Temperature.Moisture.Typeofplant.Qualityofseed.GerminationTransplantingSeedlingsSeedlingsarethesmallplants.TransplantwhenfirsttrueleavesappearHeldbythetrueleavesratherthanthest

5、emstopreventstembruisingwhichwillkilltheplant.HardeningOffThereducingofhumidityandwatertomaketheenvironmentmoreliketheoutside.AdvantagesofSexualPropagationFastwaytogetmanyplants.Easytodo.Economical.DisadvantagesofSexualPropagationSomeplants,especiallyhybrids,donotreproducetruetoparents.Somepl

6、antsaredifficulttopropagatefromseeds.AsexualPropagationAsexualPropagationTheuseofgrowingpartsotherthanseedstoreproduceplants.Thetypesare….CuttingsLayeringDivision/SeparationBuddingGraftingTissueCultureRootingfromCuttingsRootingmediashouldbeabout4inchesdeep.Besttimeofdaytotakecuttingsisearlymo

7、rningbecauseplantshavemoremoisture.RootingfromCuttingsThethreemaintypesofcuttingsare….StemLeafRootStemCuttingsThetakingofapieceofstemtoreproduceplants.Usearootinghormonewithfungicideto….Speeduprootdevelopment.Preventrootrot.LeafCuttingsTheuse