秸秆配施蓝藻和针铁矿对黑土区稻田土壤温室气体排放的影响

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中图分类号：X71；X16；S154 文献标志码：A 文章编号：1672-2043（2025）12-3282-11 doi：10.11654/jaes.2024-1027

Impactsof straw incorporation with nitrogen-fixing cyanobacteriaand goethiteon greenhouse gas emissions frompaddysoilsintheblacksoil region

FAN Congcong'，WUFan'，ZHAO Lixia，LIANG Yuting，XIAO Xian'，CAI Hao'，ZHAO Yuan，WANG Xiaoyue （1.SchoolofEnvioentalienendEngieing，angzouUniversityhangzou3164，ina;2.anjingIsiutefSil Science，Chinese Academy of Sciences，Nanjing，China）

Abstract：Toinvestigatetheefectsofusinggoethiteasamitigationmaterialongreehousegasemissionsfrompaddysoilundertecoapplicatiooftrogen-fixingcyanobacteriaandicestraw，aswellasitsmicrobialmechanisms，aOO-dayaterloggedicubation experiment was conducted at a constant temperature of 20qC using albic paddy soil from the black soil region in northeast China. Four treatments were established：straw（S），straw + goethite（SFe），straw + nitrogen-fixing cyanobacteria（SB），and straw +goethite +nitrogenfixingcyobc） carbonandnitrogen transformationwereanalyzed.ComparedtotheStreatment，theSBtreatmentreducedcumulativeCO emissions by 11.58% ，whileincreasing CH -4 and N2O emissions by 54.47% and 84.05% ，respectively，ultimatelyleadingina57.69%risein global warming potential（ GWP， ）.Compared to the SB treatment，the SFeB treatment reduced cumulative emissions of CH -4 and N2O by 10.31% and 38.79% ，respectively，while decreasing the GWP by 13.69% .Moreover，compared to the S treatment，the SFe，SB，and SFeB treatments significantlyalteedsoilcemicalpropertisadthbundancoficrobialcommunitisassociatedwithgeousegasmissiosBsed on correlationanalysis and random forest modeling，soil DOC，NO3-N，NH4-N，and the abundance of mcrA ，and nirS genes were identified as keydriversofgreehousegasemissions.Thisstudyrevealedthatcomparedtostrawaddionalone，thecoapplicationofstrawand nitrogen-fixingcyanobacteriasignificantlyenhancedgreenousegasemisionsinpaddysoilsintheblacksoilregionsHowever，the addition of goethite effectively suppressed CH4 and N2O emissions induced by straw-cyanobacteria co-application in paddy soils，thereby mitigatingthe GWP ：

KeyWords： nitrogen-fixing cyanobacteria; goethite; straw return; greenhouse gases; functional gene

农业生态系统排放的温室气体占陆地生态系统总排放的 23%～30% ，其中稻田由于长期处于淹水厌氧状态而成为 CH4 和 N20 等温室气体的重要排放源。（剩余20818字）