Effects of Continuous Cropping Years on Bacterial Community Structure in Maize Rhizosphere Soil
To investigate the effects of continuous cropping years on bacterial diversity in maize rhizosphere soil,High throughput sequencing technology was used to sequence the rhizosphere soil bacterial communities of maize under different years of continuous cropping.The results showed that,Proteobacteria,Acidobacteria,Gemma-timonadetes were the dominant bacterial groups.Acidobacteria,Planctomycetes,Gemmatimonadetes and Rokubac-teria decreased first and then increased with the extension of continuous cropping years.Actinobacteria,Proteobac-teria,Chloroflexi,Firmicutes and Bacteroidetes showed a trend of first increase and then decrease with the extension of continuous cropping years.Proteobacteria,Gemmatimonadetes and Rokubacteria had the lowest content in maize rhizosphere soil after 11 years of continuous cropping,Actinobacteria,Chloroflexi,Bacteroidetes and Firmicutes all had the highest concentrations in soil after 11 years of continuous cropping.Soil pH,available potassium,and avail-able phosphorus significantly influence the structure of soil bacterial communities,with soil pH having the greatest impact on bacterial community structure.
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