覆膜连作年限对棉田土壤线虫群落结构的影响

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中图分类号：S154.386 文献标志码：A 文章编号：1672-2043（2025）09-2313-10 doi：10.11654/jaes.2024-0789

Abstract：Torevealthefetsofcontiuouscroppingwithplasticfiulchingonsoilnmatodecommuitiesstructureincotonfields，soilsampleswrecollctedatO，5，1，OdyearsfroLnouBow，anasCountyinjang.hesoil'siccal propertieswereaalyzed，andsoilnematodeswereisolatedandidentfied.Teresultssowedatwiththeincreasigofontiuous cropingwithsticulcgars，ilpantlycreadtteoflcaterifaleaddl available potassium content significantly decreased.Helicotylenchus was the dominant genus with 39.31%-69.87% abundance in the compositionofsoilnematodeommunitis.Theainutritioalgroupsofsoilnematodewereplantparasitesandbacterivores.Inefst5 yearsfoneingsteadntlddaeoflatasiticatodsinileaddgdall withthe extension of continuous cropping years.The abundance of plant parasites nematodes reaches its highestpointof 74.38% in the 30th yearofcontiuouscroppingyears;howeveracterivorousematodsshowedanoppositetrend，reachingtheirlowestpoinof 19.90% （ inthe3Othyearofcontiuouscoping.ComparedtoteabundanceofHelicotylenchusnematodesinuncultivatedwasteland（Oyars）and soil withcontiuouscropingfor5years，theabundanceofHelicotylenchusematodesinsoilwithontinuouscropingfor3Oyears increased by 56.98 % and 56.19% ，respectively.Soil available potassium content，soil pH，soil organic matter content and soil water content werethe mainenvironmentalfactorsaffctingthecomposionofnematodecommunitystructure.Theutritionalgroupsofnematodeswere closelyelatedtoolacaterMaturitdexofrlvgatodesM），ndmatodeati）.olae contentwasmainlydecomposedthroughbacterialpathways.Thesoilenvironmentinthewastelandwasstronglydisturbedbythe continuouscroppingmeasuresofmulchng，whichhadasignificantimpactonthecommunitystructureofsoilnematodesintefifthear. Withtheincreasfotiuouslcngyeas，tesoilfdbadualld，ndterucedndtrengthdfdbdaly stabilizedandmatured.Fromtheabove，itcouldbeconcludedthatthechangesinsoilnematodecommunitisndutritionalgoupsould be wellappiedtoevaluatethedisturbanceoflong-teulchingcontiuouscroping easuresonsoilhealthinfarland.Thisstudy contributedtoamorecomprehensiveunderstandingoftheimpactofmulchingcontiuouscroppingonsoilhalthincotonplanting n Xinjiang.

Keywords：continuous cropping with plastic filmmulching;soilnematodes; communitystructurediversity;cologicalindex

连作是集约化农业生产中的一种常见种植措施。（剩余16399字）