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Distribution Patterns of Organophosphorous Insecticide Chlorpyrifos Absorbed from Soil into Cucumber

토양에 잔류된 살충제 Chlorpyrifos의 오이 흡수이행 및 분포 양상

  • Hwang, Jeong-In (School of Applied Biosciences, Kyungpook National University) ;
  • Jeon, Sang-Oh (School of Applied Biosciences, Kyungpook National University) ;
  • Lee, Sang-Hyeob (School of Applied Biosciences, Kyungpook National University) ;
  • Lee, Sung-Eun (School of Applied Biosciences, Kyungpook National University) ;
  • Hur, Jang-Hyun (Department of Biological Environment, Kangwon National University) ;
  • Kim, Kwon-Rae (Department of Agronomy and Medicinal Plant Resources, Gyeongnam National University of Science and Technology) ;
  • Kim, Jang-Eok (School of Applied Biosciences, Kyungpook National University)
  • 황정인 (경북대학교 응용생명과학부) ;
  • 전상오 (경북대학교 응용생명과학부) ;
  • 이상협 (경북대학교 응용생명과학부) ;
  • 이성은 (경북대학교 응용생명과학부) ;
  • 허장현 (강원대학교 바이오자원환경학과) ;
  • 김권래 (경남과학기술대학교 농학한약자원학부) ;
  • 김장억 (경북대학교 응용생명과학부)
  • Received : 2014.09.05
  • Accepted : 2014.09.25
  • Published : 2014.09.30

Abstract

The transfer pattern of chlorpyrifos present in soil to cucumber plants were assessed and reported with plant growth, concentration dependency, and duration. Cucumber seedlings cultivated in a growth chamber for 30 days and a greenhouse for 120 days. Weight and length of cucumbers cultivated in the chamber increased with the increasing time, while the uptake of chlorpyrifos by cucumber increased a period from 0 to 15 days and decreased after 15 days. Uptake rates of chlorpyrifos into a cucumber plant were 1.0~1.3% to initial amounts treated with 20 and 40 mg/kg to soil. Most chlorpyrifos residues were detected in root, followed by stem and leaf. Results of the greenhouse test showed that chlorpyrifos amounts in cucumber fruits were present less than LOQ (0.02 mg/kg), and chlorpyrifos was mainly found in the root of the cucumber plant. Chlorpyrifos absorbed in a cucumber under greenhouse condition was smaller than that in chamber condition as 0.03~0.04%. Degradation patterns of chlorpyrifos in soils were similar during indoor and outdoor tests with half-lives of 25.8~73.0 days. These results may be useful for establishing the management strategy of residual pesticides in soil environment.

토양 중 잔류하는 chlorpyrifos의 오이 흡수 이행과 잔류분포를 조사하기 위하여 생장상 내 실내시험과 시설재배 포장에서의 실외시험을 실시하였다. 실내 및 실외시험 기간에 토양 중 chlorpyrifos의 분해 반감기는 각각 25.8~73.0일과 32.4~42.3일로 비슷하였다. 실내시험 오이 중 chlorpyrifos의 잔류량은 정식 후 15일까지 증가하다가 그 이후로 감소하는 양상을 나타내었으며 오이 뿌리로부터 흡수된 농약의 양은 초기 처리된 절대량의 1.0~1.3% 수준이었다. 흡수된 농약의 대부분은 뿌리에서 가장 많았으며 그 다음 줄기와 잎 순이었다. 반면에 실외시험 중 수확된 오이열매에서 chlorpyrifos의 잔류량은 LOQ (0.02 mg/kg) 미만으로 안전한 수준이었으며 오이 부위별 시료 분석결과, 실내시험에서의 결과와 마찬가지로 뿌리에서 대부분의 잔류량이 검출되었다. 실외시험에서 오이 한 개체에 흡수된 chlorpyrifos는 초기 토양에 살포된 양의 0.03~0.04%로 실내시험에서의 흡수율에 비해 30배 낮은 수준이었다. 따라서 실제 토양환경 중 chlorpyrifos의 잔류수준은 본 시험에서 시험된 고농도(40 mg/kg) 처리구보다 낮은 수준이므로 안전한 농산물의 생산이 가능하다고 할 수 있다.

Keywords

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