Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8854803 | Ecotoxicology and Environmental Safety | 2018 | 8 Pages |
Abstract
Fomesafen, a widely adopted residual herbicide, is used throughout the soybean region of northern China for the spring planting. However, the ecological risks of using fomesafen in soil remain unknown. The aim of this work was to evaluate the impact of fomesafen on the microbial community structure of soil using laboratory and field experiments. Under laboratory conditions, the application of fomesafen at concentrations of 3.75 and 37.5Â mg/kg decreased the basal respiration (RB) and microbial biomass carbon (MBC). In contrast, treatment with 375Â mg/kg of fomesafen resulted in a significant decrease in the RB, MBC, abundance of both Gram+ and Gramâ bacteria, and fungal biomass. Analysis of variance showed that the treatment accounted for most of the variance (38.3%) observed in the soil microbial communities. Furthermore, the field experiment showed that long-term fomesafen application in continuously cropped soybean fields affected the soil bacterial community composition by increasing the relative average abundance of Proteobacteria and Actinobacteria species and decreasing the abundance of Verrucomicrobia species. In addition, Acidobacteria and Chloroflexi species showed a pattern of activation-inhibition. Taken together, our results suggest that the application of fomesafen can affect the community structure of soil bacteria in the spring planting soybean region of northern China.
Keywords
MBCPCoAMgSO4ANOSIMqCO2PLFARDAPSAGram+OTUsprimary secondary amineGram-positive bacteriaGram-negative bacteriaRegularized discriminant analysisanalysis of similaritiesPrincipal Coordinate Analysisanalysis of varianceANOVAbasal respirationHigh-throughput sequencingSoil microbial communitySIMPERMetabolic quotientSoil microbial activityFomesafendry weightmicrobial biomass carbon
Related Topics
Life Sciences
Environmental Science
Environmental Chemistry
Authors
Xiao-Hu Wu, Ying Zhang, Peng-Qiang Du, Jun Xu, Feng-Shou Dong, Xin-Gang Liu, Yong-Quan Zheng,