微塑料对戊唑醇在蚯蚓体内富集的影响

Effect of Microplastics on Enrichment of Tebuconazole in Earthworm

选取蚯蚓(Eisenia fetida)为研究对象,通过测定蚯蚓体重、体内的戊唑醇浓度以及BSAF值,探究微塑料对戊唑醇在生物体内富集的影响。结果表明,只添加10 mg/kg戊唑醇的对照组中,蚯蚓体内戊唑醇的富集浓度为5.6~17.5 mg/kg;向对照组中额外加入0.2%(m/m)聚氯乙烯后,蚯蚓体内富集的戊唑醇浓度升高,富集浓度为6.0~18.4 mg/kg;加入1.0%(m/m)聚氯乙烯后,戊唑醇在蚯蚓体内的浓度极显著高于对照组,富集浓度为7.1~25.6 mg/kg,且微塑料的加入可显著降低蚯蚓的体重。生物-土壤富集因子(BSAF)值也表明,微塑料存在条件下,可显著增加蚯蚓对戊唑醇的富集。本研究旨在为评估戊唑醇及微塑料对生态环境的影响提供理论依据,并为安全使用三唑类农药和大田地膜提供数据参考。

In this study,the earthworm(Eisenia Fetida)was selected as the research object,and the influence of microplastics on the enrichment of tebuconazole in organisms was investigated by measuring the body weight,the concentration of tebu-conazole and BSAF value of earthworm.The results showed that the enrichment concentration of tebuconazole in earthworms was 5.6-17.5 mg/kg in the control group of only 10 mg·kg^(-1)tebuconazole.After 0.2%(m/m)polyvinyl chloride was added to the control group,the concentration of tebuconazole enriched in earthworms increased from 6.0 mg/kg to 18.4 mg/kg.After adding 1.0%(m/m)PVC,the concentration of tebuconazole in earthworms was significantly higher than that in the control group,and the enrichment concentration ranged from 7.1 to 25.6 mg·kg^(-1).And the addition of microplastics could significantly reduce the body weight of earthworms.The BSAF value also indicated that the enrichment of tebuconazole by earthworms could be sig-nificantly increased in the presence of microplastics.Therefore,the presence of microplastics can significantly increase the enrichment of tebuconazole by earthworms.This study aims to provide a theoretical basis for assessing the ecological impact of tebuconazole and microplastics,and to provide data for the safe use of triazole pesticides and field mulch.