生物炭与丛枝菌根真菌联用对土壤有机碳含量及稳定性的影响

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关键词：生物炭；丛枝菌根真菌；矿物结合态有机碳；铁结合态有机碳；稻田土壤中图分类号：S153.6 文献标志码：A 文章编号：1672-2043（2026）01-0127-12 doi：10.11654/jaes.2025-0094

Effects of combined application of biochar and arbuscular mycorrhizal fungion soil organic carboncontent and stability

HAN Shuang，LIANG Yuan*，ZHANG Deshan，WANG Yan

（1.SchoolofEnvronmentalienceandEngineering，uzhouUiversityofienceandechnologyuzou5o，in）

Abstract：Inordertoexplorethesequestrationefectandstabilitymechanismofbiocharandarbuscularmycorhalfungi（AM）onsoil organiccarboinadyfeld，tispperexplortheectsofblanktreatet（CK）ioharditionaloeGc），rbusulal fungi inoculation alone （ GAMF ），and their combination（ GBA ）on soil organic carbon（SOC） composition，stability，and iron-carbon binding mechanismofSOCunderalteratingdry-wetconditions throughidoor incubatioexperiments.TheresultsindicatethatGBAtreatment significantlyincreasedSOC，mineral-asociatedorganiccarbon（MAOC）andFe-boundorganiccarbon（Fe-OC）.ComparedtoCK，GBA increased SOC by 504.23% and MAOC by 1 306.80%.Compared to CK， GBA significantly reduced particulate organic carbon（POC ）/SOC by 87.10% ，but MAOC/SOC increased by 134.56% ，reaching 92.17 % ，suggesting that the combination of biochar and AMF promoted the conversionofPOCtostableMAOC.FTIRanalysisrevealedthatthearomaticcarboninGBAincreasedby30.57%comparedtoCK.The content of Fe-OC in GBA increased by 1 397.51% compared to CK，and the OC/Fe molar ratio（2.72）indicated that the production of FeOCinCBA wasprimarilypromoted throughadsorptionandco-precipitationmechanisms.XPSresults furtherrevealedthatG BA had the highest proportion of Fe3+（29.61%） ，and its high charge density enhanced the complexation of minerals and organic carbon， thereby improvingsoilcarbonstability.CorrelationanalysisshowedthatMAOCandFe-OCweresignifcantlypositivelycorelatedwithAMF colonization rate（ P <0.05），and biocharadditionincreasedtheAMFcolonizationrate，synergisticallpromotingcarbon-ironbinding.The results showedthat thecombinationofbiocharandAMFsignificantly enhances thecontentandstabilityofSOCin paddysoils. Keywords：biochar;arbuscular mycorhizalfungi; mineral-associatedorganiccarbon;Fe-boundorganiccarbon;paddyfieldsoil

土壤有机碳（Soil organic carbon，SOC）是土壤碳库的重要组成部分，其持久性一般受其化学顽固性、土壤团聚和矿物保护的控制。（剩余30630字）