Soil Aggregate Stability(3)

土壤团聚体的经典文章

84JOURNALOFSUSTAINABLEAGRICULTURE

INTRODUCTION

ofSoilsourceshumankind.isanaturalMaintainingresourcethatsustainablemustbesoilsustainablyresourcesmanagedorpreservingforthesoilfutureinforlong-termisofprimarynecessity.Thisideaistakenintoaccountre-receivingtheconceptthespecialof‘‘Sustainableattentionagriculture,’’whichcurrentlyisaglobalissue,teeagriculturalcommunity.inAccordingscientificcomunity,toTheTechnicalpolicymakers,andevenintainabletothetoagricultureConsultativeshouldGrouponInternationalAgriculturalAdvisoryResearch,Commit-‘‘sus-ofsatisfychanginghumanneedsinvolvewhilethesuccessfulmaintainingmanagementorofresourcesIntheenvironmentandconservingnaturalresources’’(LalenhancingandPierce,thequality1991).agementthiscontext,soilstructureisakeywordinthefieldofsoilresourceman-ablepointstandardforsustainingofenvironmentalagriculturalquality.productivitySoilwhilemaintaininganaccept-1988).Soilintothecomplexproblemofsustainablestructureagriculture.

isoneimportantentryandSoilstructurecanbedefinedintermsofformandstability(Kayetal.,structurevoidstressesisspacestructuralitsabilitythatexistsformreferstotheheterogeneousarrangementofsolidtoatagiventime,whereasthestabilityofasoil’ssoil(AngersandCarter,retain1996).thisarrangementGoodsoilwhenexposedtodifferentenvironmentalcharacteristicforsustainingagriculturalproductivitystructureisandamostforpreservingdesirablestabilityandcrops.storageofthequality.ofaggregatesItdependsonthepresenceofstableaggregates.Thewater,aeration,andtheerosion,poresbetweenthemaffectsthemovementgeochemicalThus,aggregatestabilityinfluencesbiologicalawiderangeactivityandthegrowthoftainingity,highprocessesinthenaturalandagriculturalenvironments.ofphysicalandMain-bio-pollutionminimizingsoilaggregatederivedsoilaggregatefromerosionstabilitysoildegradationanddegradationisessentialforpreservingsoilproductiv-aswell.andThus,minimizingmaintainingenvironmentalhighsoilsustainablestabilityisarequisiteforthesustainableuseofsoilandfortheasquality.oneoftheagriculture.soilphysicalArshadandCoen(1992)proposedaggregatestabilitydardizationHortensiusaggregateofsoilqualityandWellingpropertiesmeasurements.(1996)thatincludecanserveasanindicatorofsoilInaddition,itinthemeasurementsinternationalofstan-sivestabilitycouldalsoestimateothersoilproperties,suchastheero-soiltime,andworkcrustingandeconomicpotentialofthesoils,whichbythemselvesrequiremuchtrowManymethodsanddifferentproducemayMiller,methodssupport.

existformeasuringsoilaggregatestability(Jas-beexplained1991).The(1)reasonfortheexistenceofsomanydifferentdetermined,destabilization,and(3)bymethodological(2)bybythethedifferentexistencereasons.scalesofdifferentmechanismsthatBasically,atwhichthestabilitymaindestabi-

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