简介：TheissueofgrainsecurityinChinaisattractingglobalattention.Inthisresearch,weanalyzetherelationshipbetweengrainproductionandcroplandresources.Theresultsindicatethatdecouplingofthesetwovariablesisrealizedatthenationallevel,andfertilizerandirrigationplayincreasinglyimportantrolesingrainproduction.Ofthe18principalgrainproducingprovinces,sevenshowedabsolutedecoupling,threeshowedrelativedecoupling,fiveshowedquasi-relativedecoupling,andthreeprovincesshowedcoupling.Also,therelativeimportanceoffertilizerandirrigationingrainproductionisdifferentamongthefourdifferentmodesofcoupling/decoupling.

简介：Duringtherapidurbanizationperiod,thecontradictionbetweendemandfortheconstructionlandandthepreservationofcultivatedlandforfoodsecurityisgettingmoreandmoreseriousinChina.Withtheurbanizationtheruralsettlementlandisincreasinginsteadofdecreasing.Thispaperaimsatfindingthedrivingforcesforruralsettlementlandexpansion.Basedonlandusechangesurveydata(1996-2006)bytheMinistryofLandandResourcesP.R.C.,thispaperfindsthatpercapitaareaforruralsettlementlandismorethanpercapitaareaforcity,townshipandindustriallandineachprovinceexceptTibet.Besides,ruralsettlementlandareaandpercapitaruralsettlementlandareaareincreasingwhiletheruralpopulationisdecreasinginmostprovinces.Themainproblemsofruralsettlementlandusearelowefficiency,highvacancyrate,chaoticlayoutandillegaloccupancy.Thenthedrivingforcesforruralsettlementlandexpansion,includingeconomicdevelopment,familyincome,familyscale,psychologicalfactors,urbanization,transportation,lackofplanning,limitedcirculationofdwelling-houselandandimperfectsocialsecurity,areexploredbasedonaboveanalysis.Finally,policyrecommendations,inviewofdifferentinfluencingfactors,areputforwardtocontrolthedisorderexpansionofruralsettlementland.

简介：Thispaperprobesintotherelationshipamongindividualbenefits,benefitsofthecountry,commonbenefitsofallhumansinlanduseandlandresourcesecurity.Thefollowingbalancedlandusemodelisproposed:theharmo-niousandinteractiverelationshipbetweenmanandnature,twomainbodiesoflandecologicalsystem,constitutesthemechanismoflandresourcessecurity.Thefeedbackrelationshipbetweenmanandnatureisthebasisforthelandresourcessecurityandthecoreistherelationshipamongpeopleestablishedforthebenefitequilibriuminlanduse.Theconflictsinlandusestemfromtherarityoflandresourceandthesolutiontothoseconflictsinharmonyhelpslandresourcesecurity.

简介：

简介：Withthecontinuousprogressofnew-typeurbanizationinKarstmountainarea,howtocorrectlydealwiththerelationshipbetweenurbaneconomyandlanduseareattractingmuchattention.Basedontheland-usechangedata,thispaperanalyzesthecharacteristicsoflandusechangeanditsdrivingfactorsinGuiyangwiththemethodofland-usedynamicanalysis,landutilizationandfactorcorrelationanalysis.Wegetthefollowingresults:(1)thechangeoflandusewasobviousduring2004and2012.Theareaofarablelandandotherlandweredecreased,therateofdecreaseare3.89%and8.24%.Inthemeantime,aseriesofconstructionlandandforestareaincreasedalot,therateofincreaseare3.89%and8.24%.(2)Theintegratedlandusedynamicdegreeoftworesearchstages(2004-2009and2009-2012)weredecreasedfrom2.12%to0.34%,thissuggestsdynamicchangesoflandtendtobestable.(3)FourkindsofLanduseclasshaveagreatcontributiontotheindexoflandusedegreerespectively.Thecompositeindexoflandusedegreerosefrom229.58to247.19during2004and2012;thelanduseisstillinthedevelopmentstage.(4)Economy,population,transportationandpolicyguidancearethemaindriversoflandusechange.

简介：

简介：Basedontheanalysisofthebioenergycropproductionfunctionoflanduse,combinedwiththestatusquoofChineselanduse,thecultivationofenergyplantsandthebioenergycropproductionfunctionoflandusehadbeenanalyzesanddiscussesinthispaper.Resultsshowthattherewerealotofunusedlandsandmarginallandswhichcanbeplantedbioenergycropstoperformthebioenergycropproductionfunctionoflandusewithgreatpotentials;andcurrentlytherewerenofoodproductionproblems.Therefore,itwasveryimportantforChinatoemphasizebioenergycropsplantinginordertofullyuselandresourcesinourcountry,moderatetheenergycrisisandincreasepeasants'income.

简介：HubeiProvinceisoneofthecriticalgrainproductionregionsinChinawiththequantitativecultivatedlandandgoodnaturalcondition;itplaysanimportantroleingrainsecurityinChina.However,owingtorapideconomicgrowth,populationpressures,anthropogenicactivities,andnaturaldisasters,thequalityofthecultivatedlandhassignificantlydecreasedinrecentyearsandenvironmentalresourcesareunderincreasingstress.Inordertoresearchonthemechanismofthechangeofthecultivatedland,thispaperanalyzesqualitativelytheinfluencingfactorsofthecultivatedlandchangeinHubeiProvincefrom1978to2004,anddistinguishesthedirectfactorsfromindirectinfluentonesbymeansoftheapproachofthepathanalysis.Theresultshowsthattheareaoftherentlandinthetotalnon-agriculturalland,thetotalpopulationgrowthandthefixedassetinvestmentarethemainfactorsdecidingthechangeofthecultivatedland.Meanwhile,thedensityofthetransportationnetwork,theproportionofpercapitaincomeofruralcitizenstothatofurbancitizens,non-agriculturalgrossdomesticproduction’sshareofthetotalGDPhasalessdirecteffectbutamoreindirectinfluenceonthedecreaseofthecultivatedlandinHubeiProvince.Theresultmeansthatwhilesomefactorshavelessdirectinfluenceonthechangeofthecultivatedland,itsindirectinfluencearesignificant,viceversa.Thusit’snecessarytoadoptacomprehensivemeasurementtoprotectthecultivatedland.

简介：

简介：Accordingtothecharacteristicsoftheprimarymaterialsofthebasiclandpriceinthelittletown,theauthorusestheanalysisfunctionofthefiguresandthespacetosetofftherankunit,calculatethenumberoftheunitandranktheland.Themethodandthesystemoftheevaluationofthebasiclandpriceinthelittletown(especiallythelittletownsintheWesternChina)willbeperfect.

简介：Moderncitiesandtownsplayasthecentralplacesofwealthaccumulationforhuman-being,notonlyinthewaysofsettlementandmaterialconsumptionastheyweretraditionallyinancienttime,butalsointhewaysofsocialproductionandenvironmentalpollutionastheyaremostlytoday.Withsuchatransition,themeaningoflanduseforurbanizationhasbroadened.Accordingtotheruleofhumanecosystem,landuseformodernurbanizationcanbedividedintothreetypes:namely,thedirect,theindirectandtheinduced.However,itsstructurefollowsitsownwayofthedirect

简介：NowadaysthefasteconomicdevelopmenthasbroughtaboutseriousconflictsbetweenthelimitedlandresourcesandtheincreasinglanddemandinChuzhouCity.Thechangesoflandusestructurealsorestricteconomicdevelopmentandsocietyprogressinthisarea.Becausedifferentcitieshavedifferentfunctionallocalization,thecityareaandeachcounty(city)haveformedcharacteristiclandutilizationstructure.Itisofgreatsignificancetomakerationaluseoflandresourcesandensurethesustainableuseoflandresourcesbyanalyzingthevariationoflandusestructureinthecityareaandeachcounty(city)inChuzhouCity.BasedonthedataoflandusemodificationofChuzhouCityfrom1996to2005andadoptingthequantitativeanalysisoflandscapeecology,thispaperstudiesquantitativelythetemporaldivisionofregionallandusestructureanditsdynamicchanges.Theresultsindicatethat:(1)thismethodcanrevealthelawofthevariation;(2)thevariationoflandusestructureinChuzhouCity:increasingdiversification,evennessandheterogeneity;(3)theintensityofchangeinlandusefrom1996to2005inthecityappearedinthesequence:grassland>trafficland>gardenland>virginland>forestland>industrialandresidentialland>cultivatedland>otheragriculturalland>waterfacilityland;(4)therewereremarkabledifferencesbetweenthecityareaandeachcounty(city)intherelativechangeandthelandusestructurechangefrom1996to2005.ThispaperanalyzesthevariationoflandusestructureinChuzhouCity,andfinallyproposesrelatedcountermeasuresandsuggestions.

简介：

简介：Ecologicalconservationarea,asthemainwatersourceandecologicalbarrierofacity,providesecosystemserviceforurbansustainabledevelopment.Landusesimulationandforecastcouldbebeneficialtoimprovefuturelanduseefficiencyandenvironmentalprotection.Inthispaper,wetooktheMiyundistrictasthestudyareaandappliedtheCLUE-Smodelforlandusesimulation,basedonlandusedatain2001and2010.Eightkeydrivingfactorswereselected,includingelevation,slope,distance,populationdensityandothers.Basedontheadjustedmodelparameters,thelandusepatternsof2020inMiyundistrictweresimulatedrespectivelyforrapidgrowthscenario,landuseplanningscenarioandecologicalprotectionscenarioandthenidentifytheareaneededextraordinarysupervisioninlandplanningimplementation.Theresultsshowedthatthesimulationaccuracyfor2010reached85%considerably,implyingthattheCLUE-SmodeliswellfittedformodelingthelandusepatterninMiyundistrict.Constructionlandincreasesandcultivatedlanddecreasesdramaticallyby2020inrapidgrowthandlanduseplanningscenarios.ThepotentiallandusechangetendstooccurnearMiyunreservoir,whilethesensitiveareaforecologicalprotectionandlandplanningimplementationaredistributedaroundurbanarea,FengjiayuandJugezhuangtown.Someopencastmineareas,whichwouldbeconvertedtoforestlandinplanning,willbehardtoexecuteintheactualsituation,sotheseareasshouldbepaidmoreattentioninlandmanagement.TheconclusionsmadeinthisstudywillprovidedatareferenceandbasicinformationforthefutureecologicalprotectionandlanduseplanningimplementationinMiyundistrict,whichcouldalsobeusefulforothersimilarcities.

简介：Landresourceisthematerialfoundationofhumansurvivalandeconomicdevelopment,andthecultivatedlandistheessenceoflandresources.Thispapertakesthecountyscale,byusingthemethodofGISspatialanalysisandstatisticalanalysisunifies,toexplorethequalityofcultivatedlandinBinchuanCountyusinglevel,andexplaintheutilizationlevelofcountycultivatedlandqualityspatialdifferentiationcharacteristics.Theresultsshowedthat:(1)inthequantityofcultivatedlandqualityandutilizationlevel,theaverageutilizationofpaddylandwasgreaterthanthatofdryland,andthecomprehensiveutilizationofcultivatedlandandsoon.Amongthem,thepaddylandrangedfromgrade6to15,theaverageutilizationwasgrade11.6;drylandrangedfromgrade2to11,theaverageutilizationwasgrade5.9;comprehensiverangeofcultivatedlandisgrade2to15,theaverageutilizationwasgrade8.1;(2)thequalityofcultivatedlandutilizationspatialdifferentiation.Paddyfield,drylandandcultivatedlandandlargevaluedistributioninthecentralandsouthern,invertedVshapedistribution;thesmallerthevaluedistributionintheEastandWest,adumbbellshapeddistribution.Amongthem,theydon’tusealargervalueofpaddylanddistributedinthecentral,Southandsouthwest,themaximumvalueis14.3,thesmallerthevaluedistributionintheWestandEast,theminimumvalueisgrade7;thelargerthevaluedistributionbythedrylandintheSouthandWest,themaximumvalueisgrade10.2,thesmallerthevaluedistributionintheWestandEast.Theminimumvalueisgrade2.3;thecomprehensiveutilizationofcultivatedlanddon’tdistributedlargervalueinthecentral,Southandsouth-west,themaximumvalueisgrade12.7,thesmallerthevaluedistributionintheWestandEast,theminimumvalueisgrade3.5.Thispapercanprovidescientificbasisforthedynamicmonitoringofcultivatedlandquality,thetransformationoflowyieldfarmlandandtheearlywarningofcul

简介：

简介：Aimingatalleviatingtheserioussoilerosion,theChinesegovernmentinitiatedtheSlopingLandConversionProgram(SLCP)in1999.Now,after8yearsofprojectimplementation,theecologicalrecoveryeffectsoftheSLCPhavebecomethehotissueofacademiccircle.Thispaper,takingtheloesshillandgullyareaofnorthernShaanxiasanexample,presentsamethodologyforassessingthevegetationrestorationeffectofSLCPwithnormalizeddifferencevegetationindex(NDVI).ThekeycomponentsincludecalculationoftheGrowingSeasonNDVI(GSNDVI),andestimationoftheNVDIchangeinducedbyclimateandSLCP,respectively.Basedonthemethod,theNDVIchangebetween2000and2006wasobtainedusingtheGSNDVIthatexcludedthenoisefromsnowandice.AfterthepartoftotalNDVIchangecausedbyclimatevariationwasestimatedusingempiricformulae,weobtainedthepartinducedbyhumanfactors,i.e.theSLCP.ThehumaninducedpartofNDVIchangewasconsideredasanapproximationindicatingtheeffectoftheSLCPonthevegetation.Finally,weanalyzedtheNDVIchangecharactersofthewholestudyarea,differentslopelandsanddifferentlandusetypesbyspatialstatisticsmethod.ResultsshowthatthevegetationconditionissignificantlyimprovedbytheSLCP,particularlylandtypesthatdirectlyinvolvedintheSLCP,suchassteeplyslopefarmlands,degradedgrasslands,etc.

简介：

简介：Theperi-urbanizationareaasakindofrural-urbaninterfaceischangingrapidly,inphysical,economic,andsocialterms.Thelandusepatterninsuchareaisshiftingawayfromtheassumptionsofmainstreamparadigmstonewconceptuallandscapes,whichleadstoaseriesofproblemsoneconomicdevelopmentandsocialstabilization.Therearemanyresearchesonnon-agriculturalland-useinperi-urbanizationarea.Inthispaperbothinternationalanddomesticresearchliteratureisreviewedbydividingsixparts.Thefirstpartintroducestheconceptionofperi-ur-banizationareaanditsdriverfactors.ThenInthesecondandthethirdpart,thepaperexpatiatesontheprogressinthenon-agriculturalland-useinperi-urbanareaonland-usepattern,evolution,characteristics,problems,etc.Theforthpartfocusesonthereasonsthatcausetheland-useproblemsintheresearcharea,whilethefifthpartreviewstheintegratingwaysofnon-agriculturalland-use.Finally,recommendationsforfurtherstudyaredrawwithspecificreferencetothecurrentandfuturepositionofnon-agriculturalland-usestudyinperi-urbanarea.

简介：LandusechangesoccurringinChinaduringthetimeperiodofrapideconomicdevelopmentarelinkedtothedegradationofwaterqualityinstreamsandlakes.ThispaperexaminestheselinkagesintheDianchiLakewatershedinYunnaninsouthwestChinabasedonatwenty-yeardatasetfrom1988to2008.Pearsoncorrelationanalysisandsimplelinearregressionanalysisareemployedtoexploretherelationshipsbetweenlandusechangeandwaterqualityoftwosub-basins,theCaohaiLakebasinandtheWaihaiLakebasin,withintheDianchiLakewatershed.LandusecategoriesmorestronglycorrelatetowaterqualityintheCaohaiLakebasinthanthatintheWaihaiLakebasin.Thedifferentstructureoflandusecategories,spatialdistributionoflandcover,andscalesofbufferzonescouldbethefactorsresultinginthedissimilaritiesbetweenthesetwolakes.TheresearchcanprovidevaluableinsightsforpolicymakersintolandusemanagementinordertocurbfurtherwaterdegradationinDianchiLake.