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Translocation of residual tricyclazole from soil to Korean cabbage

엇갈이 배추 재배토양 중 살균제 Tricyclazole의 작물 전이량

  • Hwang, Eun-Jung (Department of Plant Life and Environmental Sciences, Hankyong National University) ;
  • Hwang, Kyu-won (Department of Plant Life and Environmental Sciences, Hankyong National University) ;
  • Kim, Min-Gi (Department of Plant Life and Environmental Sciences, Hankyong National University) ;
  • Jeon, Chae-Ho (Department of Plant Life and Environmental Sciences, Hankyong National University) ;
  • Moon, Joon-Kwan (Department of Plant Life and Environmental Sciences, Hankyong National University)
  • Received : 2017.07.18
  • Accepted : 2017.09.08
  • Published : 2017.12.01

Abstract

This study was carried out to investigate the residual level of 5-methyl-1,2,4-triazolo[3,4-b][1.3] benzothiazole (tricyclazole) and the amount of transfer to Korean cabbage grown in treated soil with tricyclazole. The field trial on Korean cabbage was done at two different green houses located in Gwangju (Field 1) and Yongin (Field 2). Soil and cabbage samples were collected at different days after soil treatment of tricyclazole with two different concentration levels, respectively. Average recoveries of tricyclazole ranged from 83.5 to 92.1% in soil and cabbage and the variation coefficient was 1.3-6.8%. The initial concentrations of tricyclazole in field 1 soil were 4.25 and 8.97 mg/kg and decreased to 2.48 and 4.26 mg/kg at 43 DAT (day after treatment) and 0.88 and 2.02 mg/kg and decreased to 0.43 and 0.98 mg/kg at 36 DAT in field 2, respectively. The half-life of tricyclazole was about 39.6 and 28.1 days for the low and high concentration of tricyclazole treated soils in field 1 and 27.9 and 17.2 days for the low and high concentration of tricyclazole treated soils in field 2, respectively. Residual levels of tricyclazole in Korean cabbage were ranged from 4.03 to 18.26 and from 8.26 to 35.08% of initial concentration in filed 1 and field 2 soils, respectively.

본 연구에서는 tricyclazole을 대상으로 작물재배 토양 중에 잔류된 tricyclazole의 잔류 소실 및 엇갈이 배추로의 전이량을 구명하고자 하였다. Tricyclazole은 농작물 재배 시 사용하지 않았으나 경작지 토양에서 다수 검출되는 성분 중 하나이다. 포장시험은 광주(시험포장 1)와 용인(시험포장 2)의 시설재배지 두 곳에서 실시하였다. Tricyclazole을 토양 중 서로 다른 두 농도로 처리한 후, 토양과 엇갈이 배추를 채취하였다. 토양과 엇갈이 배추 중 평균 회수율 범위는 83.5-92.1%이었고, 변이계수는 1.3-6.8%였다. Tricyclazole의 초기 토양 농도는 시험포장 1에서 4.25, $8.97mg\;kg^{-1}$ 이었으며 농약 처리 43일 후에 2.48, $4.26mg\;kg^{-1}$로 감소하였고, 시험포장 2에서는 초기 토양 농도가 0.88, $2.02mg\;kg^{-1}$ 이었고 농약 처리 36일 후에 0.43, $0.98mg\;kg^{-1}$으로 감소하였다. 시험포장 1에서의 토양 중 반감기는 저농도와 고농도 처리구에서 39.6, 28.1일 이었으며, 시험포장 2에서는 27.9, 17.2일 이었다. 엇갈이배추로 전이된 tricyclazole 잔류량은 시험포장 1과 2에서 초기 토양잔류농도 대비 각각 4.03-18.26%, 8.26-38.05% 범위였다.

Keywords

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