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KMID : 0903519970400040323
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
1997 Volume.40 No. 4 p.323 ~ p.328
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Study on Pesticide Runoff from Soil Surface II
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이성규/Lee, Sung Kyu
김용화/박창규/김정한/김균/염동혁/Kim, Yong Hwa/Park, Chang Kyu/Kim, Jeong Han/Kim, Kyun/Yeom, Dong Hyuk
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Abstract
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Runoff of phorate, soil insecticide, were measured under simulated rainfall conditions in field using small test plot(120×120 ㎝) at the loam area and loamy sand area. Fish acute toxicity tests were performed with runoff water to elucidate its toxicological effect on organisms in ecosystem. The average concentrations of phorate in runoff water from loam and loamy sand soil were 11.3 ppb and 4.8 ppb, respectively. However, there was no significant concentration difference between the heavy and the light rain. With loam soil, average runoff rates were 1.31 and 0.18%, while with loamy sand soil those were 0.48 and 0.012% under the heavy and the light rain conditions, respectively. Total average runoff rate was 0.50%. With killifish, no mortality was observed in runoff water from loamy sand soil, whereas half of the population was dead in runoff water from loam soil when it was diluted to 54.4% content.
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