<br>铁基金属有机骨架纳米农药对土壤环境中蚯蚓-土壤微生物相互作用的长期毒性作用,Science of the Total Environment

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铁基金属有机骨架纳米农药对土壤环境中蚯蚓-土壤微生物相互作用的长期毒性作用
Science of the Total Environment ( IF 8.2 ) Pub Date : 2024-01-24 , DOI: 10.1016/j.scitotenv.2024.170146
Huiya Chen ₁ , Liupeng Yang ₁ , Shiji Zhao ₁ , Hanhong Xu ₁ , Zhixiang Zhang ₁

Affiliation

随着控释纳米农药在田间条件下的广泛使用，这些纳米农药与生物系统之间的相互作用变得复杂且高度不确定。铁基金属有机框架材料（CF@MIL-101-SL）负载虫螨腈（CF）对滤纸和土壤环境中陆生无脊椎动物蚯蚓的毒性及纳米农药-蚯蚓-玉米田土壤微生物系统中相互作用的潜在机制首次被调查。结果表明，在接触滤纸试验中，CF@MIL-101-SL对蚯蚓的毒性高于CF悬浮剂（CF-SC），反之，在接触滤纸试验中，CF@MIL-101-SL对蚯蚓的毒性较小。土壤测试。在土壤环境中，与CF-SC处理相比，CF@MIL-101-SL处理减少了氧化应激和解毒酶的抑制，并减少了蚯蚓的组织和细胞亚结构损伤。 CF@MIL-101-SL的长期处理改变了蚯蚓肠道和土壤中具有降解功能的微生物群落的组成和丰度，并通过调节蚯蚓体内硝化和反硝化细菌群落的组成和丰度影响土壤氮循环肠道和土壤，证实土壤微生物在降低CF@MIL-101-SL对蚯蚓的毒性方面发挥着重要作用。总之，这项研究为纳米农药对土壤生物的生态风险提供了新的见解。

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Long-term toxic effects of iron-based metal-organic framework nanopesticides on earthworm-soil microorganism interactions in the soil environment

With the widespread use of controlled-release nanopesticides in field conditions, the interactions between these nanopesticides and biological systems are complex and highly uncertain. The toxicity of iron-based metal organic frameworks (CF@MIL-101-SL) loaded with chlorfenapyr (CF) to terrestrial invertebrate earthworms in filter paper and soil environments and the potential mechanisms of interactions in the nanopesticide-earthworm-cornfield soil microorganism system were investigated for the first time. The results showed that CF@MIL-101-SL was more poisonous to earthworms in the contact filter paper test than suspension concentrate of CF (CF-SC), and conversely, CF@MIL-101-SL was less poisonous to earthworms in the soil test. In the soil environment, the CF@MIL-101-SL treatment reduced oxidative stress and the inhibition of detoxifying enzymes, and reduced tissue and cellular substructural damage in earthworms compared to the CF-SC treatment. Long-term treatment with CF@MIL-101-SL altered the composition and abundance of microbial communities with degradative functions in the earthworm intestine and soil and affected the soil nitrogen cycle by modulating the composition and abundance of nitrifying and denitrifying bacterial communities in the earthworm intestine and soil, confirming that soil microorganisms play an important role in reducing the toxicity of CF@MIL-101-SL to earthworms. In conclusion, this study provides new insights into the ecological risks of nanopesticides to soil organisms.

更新日期：2024-01-24

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