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:2004-02-16;:2004-05-25:(30200025);;(021627,003031);:(1970-),,,,,80,,,,(,510650):,,,,500,,2/3,,,,:;;:F327165:A:1001-5221(2004)03-0231-06,195025,199960,,5,8,,,10%,10%,20%,20%,20%,20%1/4,,,,[1],,,,,,,,[2,3],,,,,1,,[4,5],124:,,243Vol124,No1320049TROPICALGEOGRAPHYSep1,2004©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,;,,,50%,;;2.1,[6],;;;;;;;[7],,,,,,,,,,:,,,,[2]2.22.2.11977,:,()Mainguet(1982)[4]2.2.2(),,,,,,,,,,[9-12]2.2.3,,(),,,,,,,,,,,,(1)2.2.46:,,,,,,,,,,,[4,8-12]2.2.5,1,,,,[4]3,,,(2,2),,,23224©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.1:Tab.1Physicalandbiologicprocessleadingdesertification:thequestionandresolve,,,,,,,,,,,,,,,,,,,(),,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,2[1]Tab12Thesimilaritiesanddifferencesbetweentechnologicfarmandecologicalfarm()()44.1,,,3323:©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,,,[13-17](Agroforestry),1960,,(theInternationalCouncilforResearchinAgroforestry):,(),/,,,,,[4,18-21]4.2,(3),,(),[1]3Tab.3Themainenvironmentriskofincreasingplantandanimalproductivityandthepotentialadvantageofagroforestrysystem(),,4.3,500,,(1),4(2),-----,(3),:--()--()-()------(43224©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.4Tab.4Theprimarymodelsortypesofagricultural-forestsysteminGuangdongprovince--()-()-()-()-()---------(),-()---()---()---()---()----()-()--,------()-()-)----,--,----,---,--(),(4),,,,(5),,,,(6),:--()--,,,---()-(),,(7),,,,,,5,,,,,,;,,,,,[7],,,,,,,,,()320,40,,,,[15]2/3[22],,,,,,,,,,5323:©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.[1]BoehnertJ.Agroforestryinagriculturaleducation[M].Germany:VerlagJosefMargrafScientificBooks,1999.182.[2],,.[A].,.21[C].:,1999.57-63.[3].[M].:,2000.175-211.[4]BaumerM,Agroforestryanddesertification[M].TheNether2lands:TechnicalCenterforAgriculturalandRuralCooperation,1990.5-41.[5]DavyAJ,PerrowM.H/Bofrestorationecology(I)[M].Lon2don:BlackwellScience,2000.528.[6].[M].:.1993.12-78.[7],.[M].:,2001.57-69.[8]UrbanskaKM,EdwardsP.Restorationecologyandsustainablede2velopment[M].Cambridge:CambridgeUniversityPress,1997.413.[9]MajumdarSK,MillerEW,SageLE.EcologyandresotrationoftheDelawareriverbasin[M].Pennsylvania:PennsylvaniaAcade2myofScience,1988.431.[10]WadeM,JoyceC.Europeanwetgrasslands:biodiversity,man2agementandrestoration[M].London:JohnWileyandSons,1998.358.[11]BradshawAD.Methodsinecologicalrestoration[M].London:BlackwellScience,1999.250[12]VanAndel.Restorationecology.London:BlackwellScience,1999.256.[13],,.[M].:,1987.1-5.[14],.[M].:,1995.65-120.[15],.[M].:,1996.12-27.[16].[M].:,1987.32-48.[17].[M].:,1990.1-148.[18].[J].,1995,10(3):225-231.[19]ChanGL.Integratedframingsystem[M].Amsterdam:Elseviersciencepublishers,1985.27.[20].[M].:,1992.1-40.[21],.[J].,2000,20(2):102-106.[22].[M].:,1994.1-128.TOAVOIDDESERTIFICATIONOFAGRICULTURALLANDBYDEVELOPINGAGROFORESTRYRENHai,LIGao2fei,SHENWei2jun,LIZhi2an,WANGZhen2feng(SouthChinaInstituteofBotany,theChineseAcademyofSciences,Guangzhou510650,China)Abstract:Duetopopulationincreaseandeconomicdevelopment,agriculturalactivitiesresultinbiodiversityloss,habitatchange,soilerosion,andthenleadstodesertification.Desertificationisonekindofecosystemdegrada2tionwhenecosystemsuffersfromirreversiblestress,uncertainclimateandexorbitantexploitation.Agriculturecangainhigherproductivitybyimprovingplantsandanimalsthroughbioengineeringwithoutconsiderationofenvironmentalrisk.Ecologicalagricultureandorganicagriculturearewisechoice.Asonekindoforganicagri2culture,agro2forestrycanachievebothincreaseofproductivityanddecreaseofenvironmentalrisk.InvestigationshowsthatinGuangdongProvincetherearemorethan500modelsofagro2forestry,whichcanbedividedintoa2gro2silviculturalsystems,silvi2pastoralsystems,agro2silvi2pastoralsystems,silvi2fisherysystems,silvi2agro2pas2toral2fisherysystems,silvi2agro2insectsystems,andsight2seeingagro2silviculturalsystems.Twothirdofthear2easofGuangdongProvincearehillyland.Thedevelopmentofthoseagro2forestrymodelswouldbehelpfultoad2justmentofagriculturalstructure,makingfulluseoflocalnaturalresources,increaseofproductivity,improve2mentofregionalenvironment,andthentosustainabledevelopment.Keywords:Agro2forestry;Desertification;Agriculture63224©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.