| 苯醚甲环唑在芹菜和土壤中的残留行为及风险评估 |
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| 引用本文： | 陈武瑛,陈昂,李凯龙,罗香文,熊浩,刘志邦,宋增收,刘勇.苯醚甲环唑在芹菜和土壤中的残留行为及风险评估[J].农药学学报,2022,24(6):1500-1507. |
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| 作者姓名： | 陈武瑛 陈昂 李凯龙 罗香文 熊浩 刘志邦 宋增收 刘勇 |
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| 作者单位： | 1.湖南省农业科学院 植物保护研究所，长沙 410125 |
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| 基金项目： | 长沙市自然科学基金(kq2202340)；国家重点研发计划(2016YFD0200200). |
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| 摘 要： | 在湖南和山东开展了10%苯醚甲环唑水分散粒剂在芹菜上的残留田间试验，在室内进行了土壤生物的急性毒性试验。基于苯醚甲环唑的残留试验数据和毒性端点值，就苯醚甲环唑对中国不同人群的长期及短期膳食摄入风险和对土壤生物的环境风险进行了评估。结果表明:苯醚甲环唑在芹菜叶、茎和土壤中的消解半衰期分别为5.2~8.8 d、8.0~8.2 d和13.6~15.0 d。苯醚甲环唑按推荐剂量有效成分120 g/hm2喷雾施药3次，施药间隔期5 d，距最后一次施药5 d收获时苯醚甲环唑在芹菜叶片中的残留量高于MRL (3 mg/kg，中国)，在茎和整株芹菜中的残留量均低于MRL。普通人群和1~6岁儿童的短期摄入风险商 (RQa) 值分别为0.09和0.10；对于不同人群，芹菜中苯醚甲环唑对长期膳食摄入风险商的贡献率 (RQc%) 为9.4%~19.8%。10% 苯醚甲环唑水分散粒剂对环境中的土壤生物风险商 (RQe) 值为0.368~0.890，不会产生初级急性风险。
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| 关 键 词： | 苯醚甲环唑 芹菜 残留行为 膳食风险评估 环境风险评估 |
| 收稿时间： | 2021-12-20 |
Residue behavior and risk assessment of difenoconazole in celery and soil |
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| Institution: | 1.Hunan Plant Protection Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China |
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| Abstract: | The field trials on terminal residue and dissipation of difenoconazole in celery were carried out in Hunan and Shandong Provinces, and the acute toxicity of 10% difenoconazole water dispersible granule (WG) on soil organisms were studied in the laboratory. Based on the residue data and toxicity endpoints, the long-term and short-term dietary intake risks of difenoconazole to different populations in China and the environmental risks to soil organisms were evaluated. The results showed that the half-life of difenoconazole in celery leaves, stems and soil were 5.2-8.8 d, 8.0-8.2 d and 13.6-15.0 d, respectively. After the formulation was applied for three times with the interval of 5 days at the recommended dosage of 120 g/hm2, the residue of difenoconazole in celery leaves was higher than MRL (3 mg/kg, China) and the residues in celery stem and the whole celery seedling were less than MRL on the 5th day after last application. The short-term dietary intake risk quotient (RQa) for the general population and children aged 1-6 years were 0.09 and 0.10, respectively. The long-term dietary risk assessment results showed that the contribution rate of the residues in celery for different populations in China was 9.4%-19.8%. The primary risk of 10% difenoconazole WG to soil organism was acceptable with acute risk quotient (RQe) of 0.368-0.890. |
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