大青山油松人工林地土壤水分特征研究

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1、摘要本文對(duì)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(jìn)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(dāng)林分密度為2933～3307株／hm。時(shí)，其分別為23．60％～26．90％，1．2l～1．3l和53．16％～53．68％；當(dāng)林分密度為2202株／hm2和4463株／hm2時(shí)，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(dǎo)水率隨著林分密度的增加呈降低趨勢(shì)，而40cm深土壤飽和導(dǎo)水率隨著林分密度的增加呈上升趨勢(shì)。(3)表層到40cm層土壤含水量變化范圍為，當(dāng)林分密度為2933～3307株／搿時(shí)，旱季為5．87％～7．24％，雨季為12．60％～13．00％；當(dāng)林分密度為2202株／h寸和4463株／hm2時(shí)，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(shí)，隨著林分密度的增大樹(shù)干徑流呈增大趨勢(shì)。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