Deciphering the degradation characteristics of the fungicides imazalil and penflufen and their effects on soil bacterial community composition, assembly, and functional profiles,Journal of Hazardous Materials

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Deciphering the degradation characteristics of the fungicides imazalil and penflufen and their effects on soil bacterial community composition, assembly, and functional profiles
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2023-08-23 , DOI: 10.1016/j.jhazmat.2023.132379
Lingxi Han ₁ , Han Xu ₁ , Qianwen Wang ₂ , Xiaoli Liu ₁ , Xiaoming Li ₁ , Yiran Wang ₁ , Jiyun Nie ₁ , Mingyu Liu ₁ , Chao Ju ₃ , Congjun Yang ₃

Affiliation

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.

中文翻译：

破译杀菌剂 imazalil 和 penflufen 的降解特性及其对土壤细菌群落组成、组装和功能特征的影响

在 8 种不同土壤中系统研究了 imazalil 和 penflufen 两种广泛应用的杀菌剂的吸附-脱附和降解特性，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。imazalil 在土壤中的吸附能力显著高于 penflufen。imazalil 和 penflufen 在大多数土壤中都按照以下顺序缓慢降解：imazalil > penflufen，土壤 pH 值、淤泥和粘土含量是潜在的主要影响因素。imazalil 和 penflufen 均明显抑制了土壤微功能多样性，改变了土壤细菌群落并降低了其多样性。尽管暴露于低浓度和高浓度的 imazalil 和 penflufen 加强了土壤细菌群落之间的相互作用，但在高浓度下共生网络的功能多样性往往很简单，尤其是在 penflufen 处理中。imazalil 和 penflufen 均显著干扰土壤氮循环，尤其是 penflufen 严重抑制了大多数氮循环过程，如固氮和硝化。同时，在土壤中分别发现了 16 种和 10 种潜在的 imazalil 和 penflufen 降解细菌，包括 Kaistobacter 和 Lysobacter。总的来说，长期施用 imazalil 和 penflufen 可能会导致土壤中的残留积累，进而对土壤生态产生严重的负面影响。

更新日期：2023-08-23

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