PlantPropagationLesson4MethodsofplantpropagationasrelatedtohorticulturalplantproductionPropagation•Themultiplicationofakindorspecies.•Reproductionofaspecies.•Twokinds：•SexualPropagation•AsexualPropagationSexualPropagation•Propagationfromseeds.•Pollenistransferredfromtheanthertothestigma.•Fertilizationoccursandseedsareproduced.Color,WeightandSizeVariationsinSeedsAssortedbeanswheatgrainfenugreekblackmustardhempgreenlentilsdriedpeasgreensplitpeassoyabeanswheatgermoatsGoldenflaxPintobeanscorianderVarietyofpulsesShapeVariationsinSeedsPartsoftheSeedPartsoftheSeed•Seedsaremadeupof3mainparts….–SeedCoat.–Endosperm.–EmbryonicPlant.PlantingSeeds•Plantingdepthdependsonthesizeoftheseeds.•Thelargertheseed,thedeeperitisplanted.–Example:Petuniaseedsareplantedshallowerthanbeans,tomatoes,ormarigoldsbecausetheyarethesmallest.•Smallseedsshouldbewateredbybottomsoaking.PlantingSeeds•Seedsaredirectlyseededwhentheyareplantedinthesoilwheretheywillgrowtoasaleablesize.•Germinationflatsareusediftheyaretobetransplantedatalatertime.–Whenreusinggerminationflats,besuretosterilizetheflatsandsoil.Germination•Germinationrateisthe%thatsprout.–Example:75outof100=75%•Ratesaffectedby….–Seedviability.–Temperature.–Moisture.–Typeofplant.–Qualityofseed.SeedstoSeedlingsTransplantingSeedlings•Seedlingsarethesmallplants.•Transplantwhenfirsttrueleavesappear•Heldbythetrueleavesratherthanthestemstopreventstembruisingwhichwillkilltheplant.Seedlings(smallplants)•Transplantwhenfirsttrueleavesappear•Reducehumidityandwaterandmakeenvironmentmorelikeoutsideto“hardenoff”plantsAdvantagesofSexualReproduction•Fastwaytogetmanyplants•Easytodo•EconomicalDisadvantagesofSexualReproduction•Someplants,especiallyhybrids,donotreproducetruetoparents•SomeplantsaredifficulttopropagatefromseedsAsexualReproduction•Usesgrowingplantpartsotherthanseeds•Typesofasexualreproduction:–cuttings插枝–layering压条–divisionorseparation–Budding–grafting–tissuecultureRootingfromCuttings•Rootingmedia...
