天山典型天然草地土壤有机碳空间分布特征

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关键词：天然草地；土壤；有机碳；遥感估算；空间分布

中图分类号：S812.2 文献标识码：A 文章编号：1008-9500（2025）12-0218-05

DOI： 10.3969/j.issn.1008-9500.2025.12.064

Abstract： Inorderto revealthe distributionpatternand influencing factorsof soil organiccarbon in typical natural graslands in the Tianshan Mountains，the research method combining field data measurementand geographic information technologyisadoptedtoestimatethesoilorganiccarboncontentatdiferentdepthsinthestudyareaandanalyzethespatial distributioncharacteristics.Theresultsshowthataccordingtodifferent models，theaverageorganiccarbon densityof the seven soil layers in the study area is 4.21， 4.38，4.19，3.88，3.67，1.83，and 1.92g/m2 ，respectively. When the soil depth is 0～40 cm，the overallSoil Organic Carbon （SOC）content is relatively high，andthe high-value areas are mainlylocated in the southwest of the studyarea，inthe northeast and southeast，asthedepth increases，the SOC densityshowsa decreasing trend.When the depthis between 40～100 cm， the overall SOC content in the study area decreases，which is consistent with the SOC performance at depths of 0～40 cm，there is a high-value distribution in the southwest of the study area. The organiccarbon contentof natural grassandsoilintheresearcharea shows significant spatial diferences，andthe soil organiccarboncontentdecreaseswiththe increaseofsoildepth，according todifferent grasslandtypes，itisdivided nto alpine meadow > subalpine meadow > mountain meadow > temperate grassland > temperate desert grassland. The research esults providea scientificbasis forevaluating thecarbon sequestration potential of typical natural grassand soilsin the Tianshan Mountains.

Keywords： natural grassland; soil; organic carbon; remote sensing estimation; spatial distribution

全球气候变化背景下，控制碳排放与增加碳汇成为可持续发展的关键[1]。（剩余5451字）