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本文研究了在室温和土壤水饱和条件下,涕灭威在不同类型土壤中的渗淋和上行迁移作用。由于涕灭威及其代谢物在水中的溶解度较高,土壤有机物对其吸附性较小,涕灭威较易于随土壤重力水渗淋,但在不同类型土壤中渗淋速度是不一样的。在涕灭威的上行迁移试验中,当水份尚未饱和时,土壤毛细管作用是主要因素;土壤水份饱和后,药剂的移动速度急剧下降,上行迁移速率将主要取决于水分蒸发等环境条件。研究证明,涕灭威具有污染地下水的可能性。
In this paper, the effects of aldicarb exposure and up-migration on different types of soils at room temperature and soil water saturation were studied. Because aldicarb and its metabolites are highly soluble in water, soil organic matter is less adsorptive to aldicarb and aldicarb is more likely to infiltrate with soil gravity water, but the rate of seepage in different types of soils is different. In aldicarb migration experiment, when the water is not saturated, the capillary action of the soil is the main factor. When the soil moisture is saturated, the moving speed of the pesticide drops sharply. The up-migration rate will mainly depend on the environmental conditions such as water evaporation. Studies have shown that aldicarb has the potential to contaminate groundwater.