不同秸秆还田方式对土壤养分和微生物的联合影响

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中图分类号：S18 文献标识码：A 文章编号：2095-5553（2025）12-0230-10

Abstract：Inordertostudytheefectsof diferentstrawreturningmethodsonsoilenvironmentalfactorsandbacterial community structure under rice-wheat rotation system，three treatments were set up as folows：straw removal + traditional rotary tillage（RTNSR），straw returning + traditional rotary tillage（RTSR），straw returning + vertical deep rotarytillage（VTSR）．Thechangesof soilorganiccarboncomponents and microbial community structureunderdifferent tillage modeswerestudied，andthemolecularecological network and ecological moduleof bacterial community were constructedtoexplore thecorelationbetweensoilorganiccarboncomponentsand bacterialcommunityandnetwork characteristics.Theresultsshowed thatcompared with treatment RTNSR，soil alkali-hydrolyzablenitrogen content was significantly increased in both treatment RTSR and VTSR，which were 93.71mg/kg and 96.47mg/kg ，respectively， and soil available phosphorus content was increased by about 3.42% and 21.20% ，respectively，the soil microbial biomass carbon and nitrogen contents in treatment VTSR were 211.76mg/kg and 29.37mg/kg ，respectively，which were significantly increased by about 17.95% ， 55.72% ，the soil microbial biomass carbon was significantly increased by about 27.51% and microbial biomass nitrogen content was 27.69mg/kg in treatment RTSR，which was significantly increased by 46.81% ，soil total organic carbon，organic carbon mineralization，and heavy organic carbon contents in treatment VTSR increased by about 1.32% ， 17.45% and 10.18% aswell. Proteobacteria，Acidobacteriotaand Gemmatimonadota werethemain dominantphylaofsoil bacterial community.Acidobacteriota，Chloroflexi， Proteobacteriaand Gemmatimonadotaasthemodulekeyspecies phylum were foundin thesoil bacterial community co-occurrence network，and environmental factors such as pH ，total phosphorus，total potassium，and particulate organic carbon significantly drove the changes of these keystonespecies in the community.In summary，straw returning十 verticallyrotarysub-soilingtillagecouldregulatethesoilfertilitylevel，changethecontentsofsoilorganiccarbon components，and influence the interactions between soil bacterial communities.

Keywords：strawreturming；verticallyrotarysub-soilingtilage；soil nutrients；bacterial community；microbial co-occurrence network

0 引言

秸秆作为一种富含各类营养元素的农业可再生资源，可以提高土壤的保水保肥的能力，在土壤微生物群落及土壤结构的改善上发挥着重要作用[1]。（剩余21539字）