烟麦(薯)带状复合种植对烟草镰刀菌根腐病发生的影响

打开文本图片集

中图分类号：S435.72 文献标识码：A文章编号：1007-5119（2025）05-0046-07

Effects of Tobacco-Wheat （Sweet Potato） Strip Rotation on Occurrence of Tobacco Fusarium Root Rot

XU Wenzheng1，FAN Yikuan²，LIU Qiaozhen1， GUO Fangyang1，WU Zhaohui1， CHANG Dong， ZHANG Rui1 ， SONG Ruifang²

（1.Tobaco Research Institute，Henan AcademyofAgriculturalSciences，Xuchang 461oo，Henan， China; 2.Henan TobaccoCompany，Zhengzhou450ol8，hina;3.ingdingshanBranchofHenanTobaccoCompany，ingdingshan467oo，Hanina）

Abstract：Toinvestigatetheeffectoftobaccowheat （sweetpotato）stripotationontheoccurrenceoftobaccoFusariumroototand thesoilmicrobialcomitysuctrestwotratmentserestabshed，i.otiuosopingofobaco（SCdtoac wheat （swetpotato）stripotation（C），andtefeldincidenceofFusarumroototwassuveedThtructureandomositoof therhizospheresoilmicrobialcommunityintobaccowereanalyzed，alongwiththemicrobialinteractios.Spearmacoelation analysiswas usedtoassesstherelationship betweensoil microbialcommunity parametersanddisease index.Thustheeffectsof diferent cropping paters ontheoureneoftobacoFusariumrootot wereclarifiedMainresultsareasfollows.（l）Tobaco wheat （sweepotato）striprotationsignificantlyreducedthediseaseindex（D）ofrootrotincontinuouscroppedflue-curedtobacco （20 （44.2% lowerthan that of continuouscropping）.（2）Striprotationsignificantly altered thecompositionand structureof the rhizosphere microbialcommunityin flue-cured tobacco.Compared with continuous cropping，therelative abundance ofFusarium spp. reduced by 49.5% .（3）Compared with continuous cropping，the microbial co-occurrence network in the rhizosphere soil under rotation exhibited greater stability，with the modularity index increasing by 4.53% .（4）The disease index （DI） of root rot was significantlyandpositivelycoelatedwithterelativeabundanceofFusariumsp.thebacterialandfungalommunitystructures， andmicrobialcooccurrencenetwork diameter，respectively，whilesignificantlynegativelycoelatedwithfungalommunity richness，evenness，andnetworkmodularityindex，respectively.Inconclusion，tobacc-wheat（sweetpotato）striprotation significantlyenhanesthestabilityof theizospheresoilmcrobial network，reduces threlativeabundanceofFusarumsp.，and suppresses the occurrence of Fusarium root rot.

Keywords： flue-cured tobacco; strip rotation; Fusarium spp.; root rot; rhizosphere soil microbiota

河南是我国浓香型烟叶主要产区[1]，然而受极端天气和烤烟连作等的影响，烟草镰刀菌根腐病频发，严重时部分烟田发病率可达 30%[2] 。（剩余11088字）