模拟根系分泌物中典型小分子有机化合物化学多样性对水稻土净氮矿化的影响

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关键词：根系分泌物；小分子有机化合物；化学多样性；水稻土；净氮矿化中图分类号：S154.2 文献标识码：A文章编号：0439-8114（2026）01-0042-06DOI：10.14088/j.cnki.issn0439-8114.2026.01.008开放科学（资源服务）标识码（OSID）：□

Effect of chemical diversity of typical small molecule organic compounds in simulated root exudates on net nitrogen mineralization in paddy soil

YANGYe，YUYan-li1，HUANGSi-yun² （1.DepartmentofFoodNutriondfetyandaUnversityanghai，hina;2ClgeofRsousandEnront，Huaog AgriculturalUniversity，Wuhan43OO7O，China）

Abstract：Inodertoexploreteefectsoftediversityandcompositionofsallmoleculeorganiccompoundsonsoilnetnitogenmieralization，52siulatedootexudatecombinationswereconstructedusing9mainsallmoleculeorganiccompoundsiniceoteudatesandaddedtopaddysoil.Througha15-dayincubationexperiment，itwasfoundthatthediversityandcompositionoforganic compoundssignificantlyafectedthesoilnetnitrogenmineralizationrate.Intheoptialsimplestinearmodel，theimportanceofgly cine，aceticacidandcompounddiversityonnetnitrogenmineralizationankedthetopthree.Theefectsofsinglecarbonsourcecomponentsonnetnitrogenmineralizatioinsimulatedsecretiosshoedthataceticacid，malicacid，adpyruvatesignificantlyiied netnitrogenmineralization，whileglycine，asparticacid，serineandalaninesignificantlypromotednetnitrogenmineralizationThis suggested that plants could regulate soil nitrogen cycling by secreting smallmolecular organic compounds.

KeyWords：rot exudates；smallmoleculeorganiccompound；chemicaldiversity；paddysoil；netnitrogen mineralization

根系分泌物作为调控植物根系-土壤界面物质能量循环的重要媒介，在土壤生物地球化学循环过程中起着重要作用，并成为当前植物营养学研究的热点和前沿。（剩余9677字）