College of Horticulture, Qingdao Agricultural University, Laboratory of Quality & Safety Risk Assessment for Fruit (Qingdao), Ministry of Agriculture and Rural Affairs/National Technology Centre for Whole Process Quality Control of FSEN Horticultural Products (Qingdao), Qingdao Key Lab of Modern Agriculture Quality and Safety Engineering, Qingdao 266109, China.
College of Horticulture, Qingdao Agricultural University, Laboratory of Quality & Safety Risk Assessment for Fruit (Qingdao), Ministry of Agriculture and Rural Affairs/National Technology Centre for Whole Process Quality Control of FSEN Horticultural Products (Qingdao), Qingdao Key Lab of Modern Agriculture Quality and Safety Engineering, Qingdao 266109, China.
J Hazard Mater. 2023 Oct 15;460:132379. doi: 10.1016/j.jhazmat.2023.132379. Epub 2023 Aug 23.
The adsorption-desorption and degradation characteristics of two widely applied fungicides, imazalil and penflufen, and the responses of soil bacterial diversity, structure, function, and interaction after long-term exposure were systemically studied in eight different soils. The adsorption ability of imazalil in soil was significantly higher than that of penflufen. Both imazalil and penflufen degraded slowly in most soils following the order: imazalil > penflufen, with soil pH, silt, and clay content being the potential major influencing factors. Both imazalil and penflufen obviously inhibited the soil microbial functional diversity, altered the soil bacterial community and decreased its diversity. Although exposure to low and high concentrations of imazalil and penflufen strengthened the interactions among the soil bacterial communities, the functional diversity of the co-occurrence network tended to be simple at high concentrations, especially in penflufen treatment. Both imazalil and penflufen markedly disturbed soil nitrogen cycling, especially penflufen seriously inhibited most nitrogen cycling processes, such as nitrogen fixation and nitrification. Meanwhile, sixteen and ten potential degradative bacteria of imazalil and penflufen, respectively, were found in soils, including Kaistobacter and Lysobacter. Collectively, the long-term application of imazalil and penflufen could cause residual accumulation in soils and subsequently result in serious negative effects on soil ecology.
本研究系统研究了两种广泛应用的杀菌剂（双苯咪唑和苯霜灵）在 8 种不同土壤中的吸附-解吸和降解特性，以及长期暴露后土壤细菌多样性、结构、功能和相互作用的响应。土壤中双苯咪唑的吸附能力明显高于苯霜灵。在大多数土壤中，双苯咪唑和苯霜灵的降解速度均较慢，其顺序为：双苯咪唑>苯霜灵，土壤 pH 值、粉粒和粘粒含量是潜在的主要影响因素。双苯咪唑和苯霜灵均明显抑制土壤微生物功能多样性，改变土壤细菌群落并降低其多样性。尽管低浓度和高浓度的双苯咪唑和苯霜灵增强了土壤细菌群落之间的相互作用，但共存网络的功能多样性在高浓度下趋于简单，尤其是在苯霜灵处理中。双苯咪唑和苯霜灵均明显干扰土壤氮循环，尤其是苯霜灵严重抑制了大多数氮循环过程，如固氮和硝化。同时，在土壤中发现了 16 株和 10 株分别能降解双苯咪唑和苯霜灵的潜在降解菌，包括产碱杆菌属和蜡状芽孢杆菌属。总之，长期使用双苯咪唑和苯霜灵可能会导致土壤中残留积累，进而对土壤生态系统产生严重的负面影响。
