Pesticide pollution has gradually caused land degradation. In order to avoid this problem, it is recommended to use enantiomeric pesticides that have less impact on the soil. Cyflumetofen's (CYF) microecological environmental assessment at the enantiomer level is unclear. In our study, the degradation of CYF enantiomers and the effect on soil functions are closely related to microorganisms. (+)-CYF enantiomer is degradable preferred and further discovered that related microorganism that degrades enantiomers. CYF enantiomers alter the bacteria structure and decreased the bacteria abundance. The combination of high-throughput and quantitative PCR results showed that the diversity of the (+)-CYF treatment was significantly lower than that of the (−)-CYF (−30.41 to 44.60) treatment, and the (+)-CYF treatment (−27.80% to 56.70%) was more capable of causing the decrease in the number of soil microorganisms. In addition, (+)-CYF severely interferes with nitrogen cycling–related functions. Furthermore, the soil microbial structure was changed to its original level by enantiomers posed. In the study of nitrogen cycle functions, we found that both enantiomers can restrain the abundance of nitrogen cycle–related genes, especially the (+)-CYF treatment decreased more. Canonical correspondence analysis (CCA) showed that g-Massilia and g-Arthrobacter are closely related to nitrogen fixation genes and nitrification genes, and degradation of the two enantiomers of CYF by g-Arthrobacter is closely related. The biological effects of CYF enantiomers remain unclear. Bioassay results show that enantiomers have similar virulence to Tetranychus cinnabarinus. Therefore, while achieving the prevention and control effect, the use of a single isomer (+)-CYF has a higher potential risk to the soil ecosystem.

中文翻译：

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氟虫腈在降解和生态风险评估中的选择性影响

农药污染逐渐造成土地退化。为了避免这个问题，建议使用对土壤影响较小的对映体农药。Cyflumetofen (CYF) 对映体水平的微生态环境评估尚不清楚。在我们的研究中，CYF 对映体的降解及其对土壤功能的影响与微生物密切相关。(+)-CYF对映体是可降解的优选并进一步发现降解对映体的相关微生物。CYF 对映异构体改变了细菌结构并降低了细菌丰度。结合高通量和定量PCR结果表明，(+)-CYF处理的多样性显着低于(-)-CYF(-30.41～44.60)处理，(+)-CYF处理（-27.80% 到 56。70%) 更能引起土壤微生物数量的减少。此外，(+)-CYF 严重干扰氮循环相关功能。此外，土壤微生物结构通过对映异构体的改变恢复到原来的水平。在氮循环功能的研究中，我们发现两种对映异构体都可以抑制氮循环相关基因的丰度，尤其是(+)-CYF处理降低的更多。典型对应分析（CCA）表明 我们发现两种对映异构体都可以抑制氮循环相关基因的丰度，尤其是(+)-CYF处理降低更多。典型对应分析（CCA）表明 我们发现两种对映体都可以抑制氮循环相关基因的丰度，尤其是(+)-CYF处理降低更多。典型对应分析（CCA）表明g-Massilia和g-Arthrobacter与固氮基因和硝化基因密切相关，g-Arthrobacter对 CYF 两种对映体的降解也有密切关系。CYF 对映体的生物学效应尚不清楚。生物测定结果表明，对映异构体与朱红色叶螨具有相似的毒力。因此，在达到防控效果的同时，使用单一异构体(+)-CYF对土壤生态系统具有更高的潜在风险。