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1、摘要本文對大青山陰坡中部油松人工林地土壤水分、物理特性及林冠截留等進行了研究,主要研究結(jié)果如下:(1)林地土層厚度為35cm~104cm。林地土壤石礫含量表層為59.21%~71.88%;土壤A層為53.24%~79.83%,B層為47.35%~67.13%。(2)林地土壤田間持水量、土壤容重和土壤總孔隙度,當林分密度為2933~3307株/hm。時,其分別為23.60%~26.90%,1.2l~1.3l和53.16%~53.68%;當林分密度為2202株/hm2和4463株/hm2時,其分別為22.88%~23.04%,1.39~1.42,48.68%~49.37%。2
2、0cm深土壤飽和導水率隨著林分密度的增加呈降低趨勢,而40cm深土壤飽和導水率隨著林分密度的增加呈上升趨勢。(3)表層到40cm層土壤含水量變化范圍為,當林分密度為2933~3307株/搿時,旱季為5.87%~7.24%,雨季為12.60%~13.00%;當林分密度為2202株/h寸和4463株/hm2時,旱季為4.69%~5.98%,雨季為14.40%~14.83%。(4)各林地的林冠截留量、林內(nèi)降雨量以及地表徑流量隨著林分密度變化不明顯。降雨量大于16.3m時,隨著林分密度的增大樹干徑流呈增大趨勢。關(guān)鍵詞:大青山;油松人工林;土壤水分;林冠截留;地表徑流Studyon
3、theSoilWaterOmmzteristicsofPmustabulaefonnisPlantationofDaqingMountainAbsttactThesoilwatercharacteristics,thesoilphysicalcharacteristicsandthecanopyinterceptionofPinustabulaeformisplantationwerestudiedinthemiddleshadyslopeofDaqingMountain.Theresultsshowedthat:(1)Thethicknessofthesoillayer
4、was35—104cm.ThesoilgravelcontentWaS59.21%~71.88%insurfacelayer,whichwas53.24%~79.83%inAlayerand47.35%~67.13%inBlayer.(2)Thefieldcapacity,thevolumeweightandthesoiltotalporositywas23.60%~26.90%.1.21~1.31and53.16%~53.68%respectivitily,whenthedensityofplantWaSbetween2933stubs/hm2and3307stubs/
5、hm2,whichwas22.88%~2304%,1.39~1.42and48.68%~49.37%respectivitilywhenthedensityofplantwas2202stubs/hmzor4463stubs/bin2.Thesoilsaturatedhydraulicconductivitydecreasedasthestanddenskyincreasedin20cmsoildepth.Thetrendin40cmsoildepthwasopposffe.(3)Whenthedensityofplantwas2933~3307stubs/hm。,the
6、soilwatercontentbetweensurfaceand40cmlayerwas5.87%~7.24%indryseasonand12.60%~13.00%inrainseason.Whenthedensityofplantwas2202stubs/hm2or4463stubs/hm2,thesoilwatercontentbetweensurfaceand40cmlayerwas4.69%~5.98%indryseasonand14.40%~14.83%inrainseason.“)Thechangeofthecanopyinterception,thepre
7、cipitationinforestandthesurfacemnoffwam’tobviouswhenthestanddensitychangedWhenprecipitationwasmorethan16.3innl.thestemflowincreasedwiththestanddensityincrease.Keywords=DaqingMountain;Pinustabulaeformisplanation;Soilmoisture,"Canopyinterception;SurfacerunoffDirettedb