Impact of fomesafen on the soil microbial communities in soybean fields in Northeastern China

文献类型： 外文期刊

第一作者： Zhang, Ying

作者： Zhang, Ying;Du, Peng-Qiang;Xu, Jun;Dong, Feng-Shou;Liu, Xin-Gang;Zheng, Yong-Quan;Zhang, Ying

作者机构：

关键词： Fomesafen; Soil microbial activity; Soil microbial community; High-throughput sequencing

期刊名称：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY （ 影响因子：6.291； 五年影响因子：6.393 ）

ISSN： 0147-6513

年卷期： 2018 年 148 卷

页码：

收录情况： SCI

摘要： 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 37.5 mg/kg decreased the basal respiration (RB) and microbial biomass carbon (MBC). In contrast, treatment with 375 mg/kg of fomesafen resulted in a significant decrease in the Re, MBC, abundance of both Gram + and Gram 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.

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