简介:Anumberofstudiesindicatethatglobalclimatewarminghasbeenincreasing,especiallyinrecentdecades.Climatewarminggreatlyaffectsglobalagro-productionandfoodsecurity-becomingahotspotofglobalenvironmentalchange.Thispaperproposesastructuralandorientationalframeworkforscientificallyaddressingclimaticchangeimpactonagro-production.Throughliteraturereviewsandcomparativestudies,thepapersystematicallysummarizesinfluencingmechanismsandimpactofclimatewarmingonsuchagro-productionfactorsaslight,temperature,soilqualityandwaterenvironment.Theimpactofclimatewarmingoncultivationregions,croppingsystems,croppests,agroproductioncapacity,agro-economyandfarmmanagementisanalyzed.Then,suitableclimate-adaptingagro-developmentstrategiesareputforwardfordifferentregionsinChina.Thestrategiesarecarefullyselectedfromarepositoryofinternationaltestedclimaticchangecountermeasuresinagricultureatnationalordistrictlevel.
简介:Theessentialfeatureofagricultureistheinterweave-mentofnaturalreproductionandeconomicreproduction.Inrecentyears,thenaturaldisastershavebecomemorefrequentandbadlyaffecttheproductionmanagementandinvestmentbenefits.Thisproblemhasbeenanimportantriskinmanagingagriculturallistedcompaniesandcannotbeignored.Itisofgreatimportancetoevaluateandpreventtherisksofthenaturaldisasterstoenhancethecompetitiveabilityandincreasetheprofitsofthoselistedcompanies,therebykeepingthesustainabledevelopmentofagri-culturalcompanies.
简介:Itisofpracticalsignificanceforthedecision-makingoncountryfoodsecurityandfarmlandprotectiontoanalyzetheconversionmarginsforthemajorusesofagriculturallandandtheirvariations.Basedonthepaneldataofwheat,corn,vegetable,fruit,andforestsproductionsfrom520investigatedfarmerhouseholdsof13investigatedvillagesinShandongProvincefrom2003to2009,andusingCobb-Douglasproductionfunction,therevenueconversionmarginscanbeobtainedseparately,betweendifferentgrain-crops(wheat,corn)anddifferentnon-graincrops(vegetable,fruit,forests),andtheconversionrelationshipbetweengrowinggrain(wheat,corn)andgoingoutfornon-farmwork.Theresultsshowthatfrom2003to2009,growingwheatandcornaremoreeconomicallyandreasonablyforfarmers,comparedwithgrowingvegetable,butgrowingwheatandcornarebecominglesseconomicallyandlessreasonablydaybyday,comparedwithplantingforests.Moreover,theconversionmarginbetweenwheatandfruitshowsobviousscissorsdifference.Justfrom2007,farmers'growingfruitbecameeconomicallyandreasonably,butuntil2009,comparedwithgoingouttoworkafterabandoningfarm8land,growingwheathadnoeconomicrationality.From2003to2009,farmers'growingcornismoreprofitablethangrowingfruitandgoingoutfornon-farmworkafterabandoningfarmland.Thesubsidiesforwheatandcornhaveincreasedfarmers'comparativeincomefromfoodproductionremarkably,butthesubsidiescannotchangethegeneraltendencythatfarmerstransformfood(wheat,corn)productionintonon-food(especiallyforests)production.Therevenuedifferencebetweengrowingwheat,cornandvegetableandgrowingfruitandforestsisbeingpulledceaselesslybigger,andthetendencythatfarmerstransformwheat,cornandvegetablegrowinglandsintofruitandforestsgrowinglandshasbecomeincreasinglyapparent.
简介:Companiesbearprimaryresponsibilityforlow-carboneconomy,thusrelevantlow-carbonpoliciesshouldbesetproperlytoguidethemandtoensuretheirlow-carbonproductioneffectively.Tosolvetheproblemsgeneratedduringlow-carbondevelopment,thisarticleverifiestheexistenceofthetransmissionpathandstrength.Thisverificationincludesmediatingvariablesofcompanies’willingnessandcapacitytoconductlow-carbonproduction,atransmissionmechanismthroughincentivepathandresourcesprotection,andquestionnairedataofagriculturalcompanies.Conclusionsshowthatthelowcarbonpolicieshaveobviouspositiveeffectsonwillingnessofcorporation;thebasicservice-orientedpolicyhasasignificantlypromotingeffectonlow-carbonproductioncapacity;andlow-carbonproductionperformanceispositivelyinfluencedbywillingnessaswellascapability.Aimingatabettertransmissionpath,somecorrespondingrecommendationshavebeenputforwardintheend.
简介:TheruralsettlementsaccountedforagreatproportionofoverallbuildinglandinChina,butitstillexpandedinrecentyearsalongwithurbanizationandgraduallydecreasingruralpopulation.Toexplorethereasonforthisphenomenon,ananaly-sishasbeenmadebasedontheinvestigationinatraditionalagri-culturalregion.Thisstudyfoundthatsocioeconomicfactors,in-cludingthescaleoffamiliesanditsquantity,theimprovementofruralpublicinfrastructure,thechangeofpopulationandthepres-sureofarableland,haveeffectsontheexpansion.Theviewonlandtenurewhichhasshapedinfarmersmindsinthelonghaulmakesthemdisposetheirhousescautiously,andthiswasthemaincauseofthefactthatonehouseholdownmorethanoneplot.Inaddition,thelimitationsofrurallandinstitutionareunconducivetoinspiritingthetransferoffarmers'buildinglandandredevel-opmentoftheidlehousingland.
简介:RapidurbanizationinBeijingstimulatestheurbanlandexpansionanddiminishesavailableagriculturalland.Monofunctionalagriculturallandusecannotmeetthedemandofthedevel-opmentofthemultifunctionalagricultureandurbanizationanymore,somultifunctionalagriculturallanduseisgoingtobepromotedinthecity.Thisarticleproposestheevolvementofthelandusechangefrom1992to2004anddiscussessomeevolvementviews.
简介:Basedonshift-sharemethod,thisarticleemploysregionalshare,structuralshiftandcompetitiveshifttoanalyzethestructuralbenefitandcompetitivepositionofagriculturalstructureinwesternChinabycomparingwithagriculture,foresting,stockbreedingandfishingbeforeandafterConversionofFarmlandtoForestandGrassland(CFFG).Thenauthorsdrawfollowingconclusion:whileCFFGprogramhasbeenputinpractice,theagriculturalstructureinwesternChinahassometypicalcharacteristics,suchasgrowthfaster,structuralpredominanceobviousandmorecompetitive.Butthecontributivenessfromthecompetitionisnottoomuchyet,andthestructuralbenefitofforestestateandstockbreedingarerestrained.
简介:Researchingthedynamicdistributioncharacteristicsandtrendevolutionofagriculturalcarbonemissionsisofconsiderablesignificanceinformulatinganeffectiveagriculturalcarbonreductionpolicy.Basedonmeasurementofagriculturalcarbonemissionsof31provincesovertheperiod2002-2011,thestudyobservedregionaldifferencesandthedynamicevolutionofdistributionofagriculturalcarbonemissionsusingagriculturalcarbonintensityastheindicator,accompaniedbyGinicoefficientsandthekerneldensityestimationmethod.TheresultsdemonstratefirstthatagriculturalcarbonemissionsforChinashowanobviousnonequilibriumnatureinregardtospatialdistribution.Accordingtothedifferencesinagriculturalcarbonemissionsdynamictrends,wedividedthe31regionsintofourtypes-continuousdecline,fluctuatingdecline,continuousincrease,andfluctuatingincrease.Further,agriculturalcarbonemissionsintensityshowedadownwardtrendwithsignificantdifferencesintheresearchareas.Second,thegapinspatialdistributionofnationalagriculturalcarbonemissionsisgraduallyexpandingbasedontheresultscalculatedbyGinicoefficient.Fromtheperceptionofregionaldifferencesinagriculturalcarbonemissions,theeasternregionshowedanaveragelevel,thegapwasmoreobviousinthecentralregion,whilewesternregionshowedatrendoffluctuatingdownward.Third,accordingtoestimationbykerneldensity,theregionaldisparityinagriculturalcarbonemissionshadadownward,butlimited,trend.Inregardtoagriculturalcarbonemissionsoverthethreeareas,theregionalgapnotonlytendedtodecreasebutalsoshoweda"fourway"differentiationphenomenonintheeasternregion.Thedifferenceinthecentralregiondifferencewasnarrower.Onthewhole,thegapforthewesternregionreducedsteadilyoverasmallrange.
简介:Inthispaper,weintroducethecombiningstatedpreferenceandrevealedpreferencemethodswhichisthestate-ofthe-artmethodforthevaluationofnon-marketgoods.Revealedpreferencemethodsandstatedpreference(SP)methodshavebothbeenappliedbyeconomistsinvaluingnon-marketgoods;howeverbothmethodshaveinherentweaknesses.Inordertoexploitthestrengthsofthevariousapproacheswhileminimizingtheirweaknesses,combiningthetwomethodshasbecomeanimportantmethodologicaloption.Uptonow,agrowingnumberofliteraturesofstudyingcombingthetwotypesofdatahaveevolved,andresearchersdevelopedthreetypesofmodelstoestimatecombiningrevealedpreferenceandstatedpreferencedatainacademicfields:discretechoicemodel,continuouschoicemodelandmixedchoicemodel.Combiningstatedandrevealedpreferencemethodshavebeendevelopedfastespeciallyinthetransportstudyfieldinwhichideascouldalsobeleantforenvironmentaleconomicstudies.
简介:TheTaoerRiverbasinistheepitomeinthewestofNortheastChinaanditisoneofthemostfragileandsensitiveecoregions.Thus,protectionofwaterqualityoftheTaoerRiverisimportant.Notonlypointsourcepollutionbutnon-pointsource(NPS)pollutionresultsindeterioratingwaterquality.Inthisstudy,long-termhydrologicimpactassessmentmodelwasusedtoevaluatetheimpactsoflandusechangeimpactsonNPSpollution,andthereplacementcostmethodwasusedtocalculatetheeconomiclosscausedbyNPSpollution.ThroughanalyzingtheNPSpollutantloadsofdifferentlandcategoriesandtheeconomicloss,thearticleputsforwardthatthereexistsacloserelationshipbetweenland-usetypesandNPSpollution,andagriculturalpollutionisthemaincomponentoftheNPSpollutioninthisarea.Theresultsofthisstudycanprovidedecision-makingbasisforagriculturaldevelopmentandland-usechange.