| 氟环唑在小麦及土壤中的残留及消解动态 |
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投稿时间：2017-02-02
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| 引用本文：吴绪金,马婧玮,汪红,等.氟环唑在小麦及土壤中的残留及消解动态[J].农药学学报,2017,19(4):474-481. |
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| 基金项目:Project supported by Key Science and Technology Projects Program of Henan (142102110161);Fund for Independent Innovation of Henan Academy of Agricultural Sciences (2017). |
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| 中文摘要:为了评价氟环唑在小麦生产上使用的残留安全性，建立了气相色谱-电子捕获检测器检测氟环唑在小麦植株、小麦籽粒及土壤中残留的分析方法，并对氟环唑在小麦植株、小麦籽粒和土壤中的最终残留量及小麦植株和土壤中的消解动态进行了研究。结果表明：在添加水平为0.01、0.1和2 mg/kg（小麦籽粒和土壤）和0.01、0.1和10 mg/kg（小麦植株）下，氟环唑的回收率为82%~93%，相对标准偏差为3.0%~9.7%。氟环唑在小麦植株、小麦籽粒和土壤中的定量限均为0.01 mg/kg。氟环唑在小麦植株和土壤中的消解半衰期分别为3.5~8.4和10~30 d。当以有效成分112.5 g/hm2的剂量施药2次、采收间隔期为21 d时，小麦籽粒中氟环唑的残留量为<；0.05 mg/kg，低于中国制定的小麦中氟环唑的最大残留限量值（0.05 mg/kg）。建议氟环唑在小麦上使用时最大剂量为有效成分112.5 g/hm2，施药2次，安全间隔期为21 d。 |
| 中文关键词:氟环唑 小麦 土壤 残留 消解动态 |
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| Residue and dissipation of epoxiconazole in Triticum aestivum L. and soil under field conditions |
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| Abstract:The dissipation dynamics of epoxiconazole in wheat plant and soil were evaluated, as well as the terminal residues of epoxiconazole in wheat grains, wheat plants and soil. A simple and effective analytical method for determining epoxiconazole residues in wheat grain, wheat plant and soil was established. The residue levels and dissipation rates of epoxiconazole in wheat and soil were determined by gas chromatography equipped with an electron capture detector (GC-ECD). At fortified levels of 0.01, 0.1 and 2 mg/kg in wheat grains and soil, and 0.01, 0.1 and 10 mg/kg in wheat plant, the recoveries ranged from 82% to 93%, with relative standard deviations (RSD) from 3.0% to 9.7%. The limits of quantification (LOQ) were 0.01 mg/kg for soil, wheat grains and wheat plants. The half-lives of epoxiconazole in wheat plant and in soil were 3.5-8.4 days and 10-30 days, respectively. When at the interval to harvest of 21 days，application rate of 112.5 g a.i./ha and two subsequent applications, the residue levels in wheat grain were below 0.05 mg/kg，and the terminal residues at harvest in wheat grain were lower than the maximum residue limits (0.05 mg/kg) for this pesticide set in China. When used in wheat, the following GAP was recommended: 21 days interval to harvest from last application, two maximum applications, with application rate of 112.5 g a.i./ha. |
| Key words:epoxiconazole wheat soil residues dissipation dynamics |
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