Effects of potato leaf and stem returning on soil bacterial community and physiochemical properties
[Objective]The purpose of this experiment was to explore the effects of potato stem and leaf returning on the physiochemical prop-erties of soil and the structure of the bacterial community.[Method]Differences in soil physiochemical properties and bacterial communities were compared between soil samples with(treatment group R)and without(treatment group NR)potato stem and leaf returning using soil physiochemical analysis and Illumina high-throughput sequencing techniques.[Result]Compared to CK treatment,potato stem and leaf re-turning significantly increased soil pH,organic matter,alkali-hydrolysable nitrogen,available phosphorus and available potassium content,particularly the available potassium content with an increases from 42.36 to 141.53 mg/kg.Potato stem and leaf returning significantly af-fected the structure of the soil bacterial community,with a significant increase in the abundance of 12 bacterial taxa in the R treatment group(on the 45th and 90th day).In addition,the diversity of soil bacterial species was significantly higher in the R treatment group compared to the NR treatment group.Co-occurrence network analysis indicated that the inter-species interactions of bacteria occurred primarily in the Ac-idobacteria,Actinobacteria,and Proteobacteria phyla.The strength of the interaction was significantly higher in the potato stem and leaf re-turning treatment compared with the non-returning treatment.Correlation analysis revealed a highly significant negative correlation between Latescibacterota and Desulfobacterota with available phosphorus content and a significant positive correlation with alkali hydrolysable nitrogen and organic matter content.Furthermore,significant positive correlations were observed between Myxococcota,Bdelloyibrionota,Patescibac-teria,Entotheonellaeota,Gemmatimonadota,Nitrospirota,Proteobacteria and available potassium content.[Conclusion]The findings indi-cated that the returning of the potato stem and leaf could significantly improve the soil nutrient content,the diversity of bacterial species and the strength of interspecies interactions in the soil bacterial community.There were significant correlations between the physiochemical prop-erties of the soil and the composition of the bacterial community of the soil.
PotatoLeaf and stem returningSoil physiochemical propertiesBacterial community
NETL
NSTL
万方数据
