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Mobility of pesticides in different slopes and soil collected from Ganwon alpine sloped-land under simulated rainfall conditions  

Kim, Seong-Soo (Department of Biological Environment, College of Agriculture and Life Sciences, Kangwon National University)
Kim, Tae-Han (Department of Biological Environment, College of Agriculture and Life Sciences, Kangwon National University)
Lee, Sang-Min (Department of Biological Environment, College of Agriculture and Life Sciences, Kangwon National University)
Park, Dong-Sik (Department of Biological Environment, College of Agriculture and Life Sciences, Kangwon National University)
Zhu, Yong-Zhe (Laiyang Agricultural College)
Hur, Jang-Hyun (Department of Biological Environment, College of Agriculture and Life Sciences, Kangwon National University)
Publication Information
The Korean Journal of Pesticide Science / v.9, no.4, 2005 , pp. 316-329 More about this Journal
Abstract
Mobility of pesticides can be occurred by run-off and leachate or soil erosion. It is one of the most important factors for environmental contamination, particularly in steep sloped-land as Gangwon alpine region. In this study, the mobility of seven pesticides in different slopes and soil textures was investigated by simulated rainfall under controlled conditions. Simulated rainfall subjected to 60 mm $hr^{-1}$ was treated using rainfall simulator after 12 hr of pesticide treatment. Amounts of the pesticides were measured in run-off and leachate samples. The soil samples collected after rainfall from upper and lower parts and three different depths of sloped-plot were also analyzed. At result, all pesticides from the un-off samples collected from Taebaek(silty clay loam) and Heongseong(sandy loam) soils were detected maximum 96% within 60 minutes after first collection except carbendazim and cypermethrin which have the lowest water solubilities. From the leachate samples, a similar pattern was shown as run-off samples but amount of pesticides was lower than those of run-off samples. In soil samples, the order of the amount of pesticide residues was $0{\sim}5$ > $5{\sim}10$ > $10{\sim}15$ cm of soil depth and no pattern was shown in upper and lower, and different slopes. Comparing to mobility of pesticides in water and soil samples, pesticides in soil samples were higher than those of water samples in Taebaek soil. However, the results using Heongseong soils were in contrast to those of Taebaek soil. These results revealed that mobility of pesticides can be dependant mainly on soil textures and physicochemical properties of pesticides. Therefore, it can be suggested that selection of pesticides should be considered for soil texture and properties of pesticide in the alpine and sloped-land.
Keywords
alpine and sloped-land; run-off; leachate; soil texture; pesticide residue; pesticide mobility;
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