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[目的]研究不同浓度的溴氰菊酯农药在土壤中的残留状态和迁移动态。[方法]采用室内柱淋洗法,测定不同浓度的溴氰菊酯农药在土壤中的淋溶过程。[结果]在强度大、历时较短的等量淋溶水的作用下,随着溴氰菊酯农药浓度的增大,溴氰菊酯在土壤中的迁移能力逐渐减小,出现相对残留量最大的深度也随之减小。[结论]溴氰菊酯对地下水污染具有潜在危险性,要合理使用溴氰菊酯农药。
[Objective] The research aimed to study the residual status and migration dynamics of deltamethrin pesticides in soil. [Method] The leaching process of different concentration of deltamethrin pesticides in soil was determined by indoor column leaching method. [Result] With the increase of concentration of deltamethrin, the migrating capacity of deltamethrin in soil decreased gradually under the action of equal amount of leaching water with high intensity and lasted for a short time, and the relative residual amount appeared The maximum depth also decreases. [Conclusion] Deltamethrin is potentially dangerous to groundwater pollution, and deltamethrin pesticide should be used reasonably.