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1、红皮云杉的栽培及造林技术（CultivationandafforestationtechniquesofPiceakoraiensis）Redspruce,resistanttoYin,drought,coldandrapidgrowth,isthemaintreespeciesintheforestsofChangbaiMountainandXinganinNortheastChina.Itisalsoacommonnurseryforlandscapearchitecture.Thecultivationandafforestationtechniques
2、ofPiceakoraiensisaredescribedbelow.ThoroughbredbreedingFirst,selecttherightcrops.Piceakoraiensis,Pinussylvestris,larchstubbleisappropriate,thetwospeciesofstubblestubblefor,suchassmalloperationarea,adjusttheopenstubble,largeamountofmanureandfertilizer,andcarefuldisinfection.Two,seedg
3、ermination.Thefrozentreatmentwasthebest,theemergenceoffast,unearthedQi,strongresistancetovariousdisasters.Three.Sowseedsingoodtime.TimegenerallyinMayofthatyearon5-15daystocompletethesowingoperation,andaccordingtosoil5cmdeepsoiltemperaturestabilityat8-10degrees.Needtomeetthreeconditi
4、ons:oneisthefertilesoilstructureisgood;twoaftersowingsoilmaterialisbestpeatorcompostofhorsemanure;threetimelyirrigation,orshouldbeconsideredshade.Four,choosetheannualseedlingsbed,bigmountain.Theannualchangeisgoodtoseedlingbedbedtoensurethequalityofwork,improvethesurvivalrateofseedli
5、ngs,thenutritionspaceuniform,suitabledensity.Withtheannualseedlingbedforseedlings,whennotthinning,secondyearsallinbed,withthesamenumberofseeds,morethandoubletheseedling,obviouseconomicbenefit.FrostproofandcoldproofThetreebudsswellingandnewgrowthsectionstretchlate,usuallywithoutfrost
6、.ButinlateMayorearlyJune,latefrostdamagedduringthisperiod,ifthetemperaturereaches-2DEGCwhentheseedlingmortalityratewas24%,themortalityratewas34%at-4DEGC,reaches-5DEGCistakentopreventhypothermia,seedlingmortalityrateofmorethan70%.Forfrost,comprehensivecontrolmeasuresshouldbetaken.Suc
7、hassmoke,covergrass,plasticfilm,irrigationandsoon.SiteselectionAccordingtothebiologicalcharacteristicsofPiceakoraiensis,bestsiteconditions:sunnyslope,semisunnyslope,at8-12,deepsoil,blacksoilwithgooddrainagein20cmabovethedarkbrownsoilplots,especiallyinCutovers,20yearoldtreeplantation
8、siteconditionssucha
