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이재구,천삼영,경기성,오경석,임양빈 ( Jae Koo Lee,Sam Yeong Cheon,Kee Sung Kyung,Kyeong Seok Oh,Yang Bin Ihm ) 한국환경농학회 1993 한국환경농학회지 Vol.12 No.3
In order to clarify the possible contamination of rice straw used as a crude feed for livestock, Korean native cattle and cow, by pesticides, the samples collected from 21 sites in Korea were analyzed by a multiresidue method for 10 pesticides with GLC to obtain the following results. 1. Detection limits were 0.001ppm in butachlor, 0.002ppm in chlorpyrifos, 0.003ppm in BPMC, pirimiphos-methyl and diazinon, 0.004ppm in fenitrothion, 0.005ppm in phenthoate, 0.009ppm in IBP, 0.015ppm in carbofuran, and 0.03ppm in carbaryl. 2. In recovery tests, 73-101% of the pesticides applied were recovered, the recovery being low in carbofuran and chlorpyrifos. 3. Butachlor, 2-chloroacetanilide herbicide, and BPMC, carbaryl, and carbofuran, carbamate insecticides, were not detected in any sample. 4. In organophosphorus insecticides, the amounts of fenitrothion in sample No. 1, 2, 4, 5, 7, 12, 20 and 21 were in the range of 0.01-0.05ppm, those of phenthoate detected in sample No. 10 and 12 were 0.4 and 0.17ppm, respectively, and those of IBP in all samples, with the exception of sample No. 7, 12, 16, 17, 20, and 21, were in the range of 0.01-0.20ppm. The residues of chlorpyrifos, diazinon, and pirimiphos-methyl were not detected.
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토양중 제초제 Bentazon 잔류물의 콩과 무우에 의한 흡수
이재구,경기성,천삼영 한국환경농학회 1988 한국환경농학회지 Vol.7 No.1
土壤 中에 存在하는 除草劑 Bentazon 殘留量이 農作物에 의하여 어느 정도 吸收되는지를 究明하기 위하여 ^(14)C-Bentazon을 栽培 直前에 處理한 토양(Fresh Bentazon 토양)과 抽出이 不可能한 土壤吸着 殘留物함 形態의 ^(14)C-Bentazon을 함유한 토양(Bound Bentazon 토양)에 콩과 무우를 심고 28일간 生育시켜 다음과 같은 결과를 얻었다. 1. ^(14)C-Bentazon을 토양에 처리하고 6개월 동안 前培養(pre-incubation)하는 동안 발생된 총 ^(14)CO₂量은 처리 방사능의 14.79% 이었다. 2. 28일간 作物을 재배하는 동안 토양 중의 ^(14)C-Bentazon이 ^(14)CO₂로 無機化되는 量은 Bound Bentazon 토양보다 Fresh Bentazon토양에서 훨씬 많았으며 콩에서보다 무우에 있어서 훨씬 많았다. 3. 콩과 무우에 의하여 흡수된 ^(14)C-Bentazon 및 그 대사산물의 量은 Fresh Bentazon 토양에서 각각 45.41%와 21.48%이었으며 Bound Bentazon 토양에서는 각각 3.92%와 1.23%이 었다. 吸收된 放射能이 뿌리로부터 地上部로 移行되는 比率은 콩에서보다 무우에 있어서 훨씬 높았다. 4. 콩과 무우에 의하여 吸收된 Fresh Bentazon 對 Bound Bentazon의 비율은 각각 12 : 1과 17 : 1 이었다. 5. 作物의 存在는 ^(14)C-Bentazon의 ^(14)CO₂로의 無機化와 極性代謝産物로의 변화를 增進시킴이 立證되었다. In order to clarify how much of the residues of Bentazon could be taken up by crops, soybean and radish were grown for 28 days in soils containing freshly treated ^(14)C-Bentazon and non-extractable soil-hound residues of ^(14)C-Bentazon. The results obtained are summarized as follows. 1. ^(14)CO₂ evolution from ^(14)C-Bentazon during the 6-month pre-incubation in soil was 14.79% relative to the applied radioactivity. 2. Mineralization of ^(14)C-Bentazon in soil to ^(14)CO₂ during 28 days of crop growing was much higher in the freshly treated soil than in the bound soil, and much higher in radish than in soybean. 3. The amounts of ^(14)C-Bentazon and its metabolites absorbed by soybean and radish were 45.41 and 21.48%, respectively, in freshly treated soil, whereas those were 3.92 and 1.23% in bound soil, respectively. The translocation ratios of radioactivity .from the root to the shoot were much higher in radish than in soybean, remarkably. 4. The uptake ratios of the freshly treated ^(14)C-Bentazon to the bound ^(14)C-Bentazon by soybean and radish were 12 : 1 and 17 : 1, respectively. 5. It was well verified that the presence of crops enhanced the mineralization to ^(14)CO₂ and the transformation to polar metabolites of Bentazon.
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