不同水分管理栽培方式对山栏稻根际土壤细菌群落的影响OA北大核心CSTPCD

[Objective]The cultivation way of Shanlan upland rice is single,and the traditional slash and burn cultivation method damages the environment.Cultivation in water can be a new way for Shanlan upland rice.This work is to explore the changes in rhizosphere microorganisms of Shanlan upland rice under water cultivation environment in large fields.[Method]The cultivation treatment of Shanlan upland rice was set up with normal irrigation and drying management,and 16S rRNA gene amplification sequencing was performed on the bacterial community in the rhizosphere soil of Shanlan upland rice.The sequencing data was combined with soil physicochemical properties for comprehensive analysis.[Result]The changes in cultivation methods have significantly affected the composition of rhizosphere bacterial communities.In particular,the relative abundance of Nitrosprota and Proteobacteria in the normal irrigation is lower than that in the drying management,and the relative abundance of Firmicutes is higher than that in drying management.The top 10 bacterial communities with relative abundance are correlated with soil environmental factors.The correlation network analysis shows that more bacterial communities interact in normal irrigation,and there is a more complex bacterial network under normal irrigation.[Conclusion]Significant changes in bacterial community composition occure in the rhizosphere of Shanlan upland rice under different water management cultivation methods.The bacteria groups of Nitrospirota and Proteobacteria may improve the stress resistance of Shanlan upland rice by promoting nitrogen uptake at the root of rice.In normal irrigation,more bacterial community interactions enhance the stability of the ecosystem.