北京林业大学试办研究生院转正自评故汇报-fao

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1、ProductivityandBenefitsofFast-growingandHigh-yieldPlantationsofPoplarunderSubsurfaceDripIrrigationJIALi-mingWEIYan-kuiXINGChang-shanLiGuangdeTheKeyLaboratoryforSilvicultureandConservationofMinistryofEducationofBeijingForestryUniversityGongqingForestCentreof

2、BeijingContents1.Background2.MaterialsandMethods3.Results4.Conclusionsanddiscussion1.Background¾Water-shortageisseriousinnorthofChina.¾Traditionalmethodsofover/hole/furrowirrigationwereoftenusedinplantationsmanagement,buttheywerewasting,inefficientandun-sus

3、tainableforwaterresources.¾Watersavingirrigationshouldbeusedinplantationsmanagement,especiallyinfastgrowingandhigh-yieldplantations.¾Productivityandbenefitsoffast-growingandhigh-yieldplantationsofPoplarundersubsurfacedripirrigationinsandysoilofBeijingwerest

4、udiedinthispaper.2.MaterialsandMethods2.1Sitedescription¾GongqingForestCentreofBeijing.¾Location:neartheChaobaiChaoBaiRiver.40°16′N,116°46′ERiver¾Elevation:30m.PlotofExp.¾Soil:Alluvialsand¾Bulkdensity:1.5g/cm3.Above:thepositionofChaobaiRiverandplotofexperim

5、entinBeijingUnder:thesandysoilneartheChaobaiRiver2.MaterialsandMethods2.1Sitedescription¾Climate:warmtemperatecontinentalzone¾Annualmeantemperature:11.4℃¾Annualaccumulatedtemperature:5400℃¾Annualaverageprecipitation:630mm¾Annualaverageevaporation:2000mm¾Fro

6、stlessSeason:180-200days2.2Standcharacteristics¾Treespecies：I-214poplar（Populus×euramericanacv.‘I-214’）¾Density:5m×6m¾Plantingtime:Springin1997¾Stock:2a.2.3ExperimentTreatments-1wellcontroller2filter¾Area:7hmStresspotN1N1¾Plots(showedright):ThreeSDIsystems(

7、SDI1,maintubeSDI2,SDI3,SDI4)NormalIrrigation(CK/N1minibranchconventionalholeirrigation)tubetubedriptubetrees2.3ExperimentTreatment-2¾Irrigationmethods:SDIPlots:4～5timesinspring,1～2timesinsummer,1timesinautumn,12hourseverytime(24hourseverytimeinautumn),about

8、240liter/times·tree(480liter/times·treeinautumn).CKPlot:1～2timesinspring,1timesinsummer,1timesinautumn,about640liter/times·tree¾Fertilization:ureain1997,NHNOin1998and1999.43SDIPlots:Fertilizationbydrip