简介：Soilcrustingmayhavesignificantimpactsoninfiltration,runoffgenerationanderosioninagriculturallandsorsemi-aridandaridsoils.Thepreviousinvestigationsonsoilcrustingwereoftenconductedundersimulatedrainfallconditions.Thisstudyaimstoevaluatetheeffectsofsoilcrustingonsoilmoistureduringinter-stormperiodsandsoilandwaterlossesduringstormperiodsundernaturalrainfalls.ThestudysitewaslocatedintheLoessPlateauofChina.Fourplotswithauniformslopeandsizewereselected.Soilcrustswerekeptintactonthetwoplotsthroughoutthemonitoringperiodsof1999and2000,butwerebrokenaftereachrainstormeventontheothertwoplots.Soilmoisturewasmeasuredonallplotswithanintervalofoneweekatthreedepthsandtotaleventrunoffandsedimentdischargesweremeasuredineachstorm.Itwasfoundthatnomarkeddifferenceinsoilmoistureandrunoffexistsbetweenthecrustedanduncrustedplots.Thisisbecausetherapiddevelopmentofnewcrustsontheuncrustedplotsduringthestormevents.However,theerosionrateontheuncrustedplotswassignificantlyhigherthanthatonthecrustedplots,whichwasmainlycausedbythedisturbanceofthesurfacesoilsontheuncrustedplots.ThisstudyquestionstheeffectivenessofacommonagriculturalpracticeintheLoessPlateau,hoeinglandsafterrainfall,inreducingrunoffanderosion.
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