2000一2020年西南高山峡谷耕地边际化及生态效应

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关键词：耕地边际化；投入；产出；遥感生态指数；西南高山峡谷；GEE 中图分类号：F323.211 文献标志码：A 文章编号：2095-6819（2025）04-0855-11 doi：10.13254/j.jare.2024.0254

Marginalization and ecological effects ofcultivated land inalpinecanyons of southwest China from 2000 to 2020

LI Xu1，2 ，WUXiuqin 1，2* ，LIUYanan1，²，DONG Guihua³

CollgeofSlndWateroseatioenFrestryUvesityijng，ina;.aJasuserto NationalPositioingesearchStationeijingForestryUniversityashui65439，Chna;3.StateEnvromentalProttiKey LaboratorofQualityontrolinEnvironmentalonitorig，ChinaationalEnvronmentaloitoringCentre，eijingOoina Abstract：Toexaminethespatiotemporaldistributionandimpactofmarginalizationofcultivatedlandonecologicalqualityinthe southwestern moutainouscanyonregion，thisstudyutilizedmultisourceremotesensingandsocioeconomicdatabyemployingheGEE platformtoassessremotesensigecologicalindexResultsshoedthat：froOto2，themargalizationatioofablelandinthe southwestern mountainous and canyon regions fluctuated， with implicit margins decreasing from 6666.74km2 to 5 045.42 km² and explicit marginrisig99tOallololalitinesdblpdcou （24 90% exceptduring2O05—201Owhenanotabledeclineocuredduetoextremeweatherandotherfactors.Theecologicaleffectsof diferenttypesofcultivatedlandmarginalizationwrediferent.Mildandmoderatemarginazationhadapositiveimpactonological qualitywhiletepbleoflogicalualityadaiinsevrelyargialideassoreousEologicalagialatiad naturalmarginalizationareashdacerainimprovementfctonologicalqualityndthengativeipactofconomicrginalation onecologicalqualityasmorebvious.Thestudyindicates tatarablelandmarginalizatiointheareaitiallyasesthnintensifis，with mixedecologicalimpacts.Tailoredmanagementandconservationstrategiesareneededforvariousmarginalizedzones toenhancelanduse and ecosystem recovery.

Keywords：marginalization of cultivated land; input; output; RSEI; southwest mountain canyon; GEE

耕地资源是农业生产过程中的重要物质资源，与生态环境相互依存，耕地变化对生态环境产生的影响已引起广泛关注。（剩余14954字）