假单胞菌生物有机肥促进烤烟生长的土壤微生物学机制

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中图分类号：S572；S154.39 文献标识码：A文章编号：1007-5119（2026）01-0069-10

Abstract：To elucidate the soil microbial mechanismsunderlying the growth promotionof flue-cured tobaccoby Pseudomonasenrichedbirganicertl，teetrametsrtabld：ovetioalertilatioCK），tadiioaloaniertl（F）， andPseudomonasbiofertilzer（B）.esewerevaluatedforectsonleafdrymassperplant，zosphericsoilutrnts，cobal communitystructure，andrelativeabundanceofpathogenicfungi.Theresultsdemonstrated tatBFsignificantlyincreasedleaf dry mass by 0.98% and 12.1% compared to OFand CK，respectively.Compared to CK，BF significantly increased cured tobacco yield value，soilavlableN，，K，OCandmicroialoccueeetwrkabilityileigniiantlyreasingelaie abundanceof pathogenic fungi.Random forest analysisidentified DOC，average clusteringcoeficient，averagepath lengthand pathogenicfungalabundanceaskeydeterminantsofleafdrymass.Notablyleafdrymasshowedahighlysignificantpositive correlatinwithDOCcontentandtheclusteringcoeficientof microbialco-ocurrencenetworks，whileexhibitingnegative corelatins withaveragepathlengthandtherelativeabundanceof pathogenicfungi.Inconclusion，Pseudomonas-biofertilizer optimizes rhizosphericnutrientavailabilityandmicrobialnetworkarchitecture，suppresses pathogenic fungi，and promotes tobaco growth， demonstrating superior application potential over traditional organic fertilizers.

Keywords：flue-curedtobacco;biorganicfertlir;microbialcommnitysructure;micobialcouene netwok;dissolved organiccarbon

烤烟连年种植与化肥过量施用，导致土壤退化、病害频发，严重制约产量与品质[1]。（剩余15077字）