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1、2882008M83ACTAECOLOGICASINICAVol.28, No.8Aug., 2008htp:/:SE1Sv9(90502006);jS/v“7v”;8S/1(2005K01-G14-03)l:2007-04-28;:2007-11-07Te:(1968 ),3,0,pV3,1VY$rs3.E-mail:Foundationitem:TheprojectwasfinanciallysupportedbyNationalNaturalScienceFoundationofChina(No.90502006);“InnovationTeam” ProgramofNorthwestS
2、ci-TechUniversityofAgricultureandForestry;SupportingProgramfromShaanxiProvince(No.2005K01-G14-03)Receiveddate:2007-04-28;Accepteddate:2007-11-07Biography:WANGYan-Ping, Ph.D.candidate, Associateprofessor, mainlyengagedinecologysuchasrelationshipbetweenvegetationandsoilmoisture.E-mail:ru$rs3王延平1, 2, 邵
3、明安2, 张兴昌2(1.jS/v,1712100;2.SSrrrSKljO)j。M=WB$rscM1?3200cmr=,Msr9F7h。B31,$0 120cmrcMsv,$Wsl;120cm/r,Msl,$Wsv。M3$(i,r2locustalfalfaChinesearbor-vitaepoplarChinesepinewildlandapricotChinesedatefarmland.Annualvariationsofsoilmoisturewithsamevegetationwereweakenedhtp:/withsoildepthincreasing, andhappened
4、mainlyin0-200 cmsoillayers.Insamegrowthseason, alCV(CoeficientofVariation)ofsoilmoistureunderdiferentvegetationswerebiggerandconcentratedcomparativelyin0 -120 cmsoillayers,butdiferenceofCVindiferentvegetationswassmal;below120cmsoillayers, CVweresmaler, butdiferenceofCVindiferentvegetationswasbigger.
5、Permanentsoildrylayersalwayshappenedunderconditionofperennialvegetationsinsteepslope, butthediferenceofsoilaridizationintensitywasobviousamongdiferentvegetationsandgrowthyears.Soilwatercompensationandrecoverydepthsinrainyseasonwere1.0 -1.4 m, butthesoilwaterstorageincrementandcompensationdegreeindif
6、erentvegetationsweredramaticalydiferent.Soilwatercompensationdepthinsamevegetationinrainyyearswasincreasedover60 cmthanindryyears, whilethesoilwaterstorageincrementin5 msoillayerswasincreasedover3times.Undernaturalprecipitation, thesoilwaterdeficitinartificialvegetationsinsteepslopecannotbereduced,
7、soilaridizationalsocantberelieved.KeyWords:loessregioninNorthShaanxi;steepslope;perennialartificialvegetations;soilmoistureecologicalenvironmentrsKru33i1oy0,c3?、s+Y。7$YrsKKy,M3$,r%Vh71,rsC,r2。r$rs3?1 、s32 6$r5 715 。rururKu,MrSK1.6t/(km2a),956%, 259r51.55%,u$yr4。rsdn,$y!r、5li。zg$3i3rs3+,$4、?rsr4VLG,M
8、3D、9、$rsd。BM$rsMT?p,u$3y!1il。m1sUimFig.1Thedistributionofthesamplelands1uru,p,r7.26km/km2 。Fsrs。rr,r,SK)j。H、O、Aj,76()、)5j,$3MK、3+8y%(V2)。H$rsy、/1,1.0 1.4m,j、,1.4m,、O、)Q,1.2m,7H1.0m。1rsys1rsc、3=、5n#dZY9vs。 5mr=,r9Kv,183.9mm,Kl,79.5mm,Q)HjO,rs5jK,22.33%,K,10.03%,Qj)HO。 0 2mr=,jrsK46.4%,OK,27.9%,Qj)HO,72 5mr=,$rs(,.C,v,Vshrs,?K1
