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Absorption of soil residual azoxystrobin to lettuce

상추 재배토양 중 잔류 Azoxystrobin의 작물흡수

  • Kim, Min-Gi (Department of Plant Life and Environment Sciences, Hankyong National University) ;
  • Hwang, Kyu-Won (Department of Plant Life and Environment Sciences, Hankyong National University) ;
  • Hwang, Eun-Jung (Department of Plant Life and Environment Sciences, Hankyong National University) ;
  • Yoo, Soo-Cheol (Department of Plant Life and Environment Sciences, Hankyong National University) ;
  • Moon, Joon-Kwan (Department of Plant Life and Environment Sciences, Hankyong National University)
  • Received : 2017.08.21
  • Accepted : 2017.09.21
  • Published : 2017.12.01

Abstract

This study was conducted to investigate the residual level and the amount of transfer to lettuce grown in field condition treated with the 5-methyl-1,2,4-triazolo[3,4-b][1,3]benzothiazole (Azoxystrobin). The field trials on lettuce were carried out at two different green houses located in Gwangju (Field 1) and Yongin (Field 2). Soil and lettuce samples were collected at different days after soil treatment of azoxystrobin with two different concentrations, respectively. Average recoveries for azoxystrobin ranged from 86.9 to 113.6% from soil and lettuce with the variation coefficient of 0.1-4.6%. The initial concentrations of azoxystrobin in Gwangju soil were 9.20, 11.00 mg/kg and decreased to 1.36, 2.70 mg/kg at 43 DAT (days after treatment) in field 1, while 1.06, 2.23 mg/kg decreased to 0.20 and 0.67 mg/kg at 36 DAT in field 2, respectively. The half-lives of azoxystrobin were about 19.4 and 23.3 days for the low and high concentration of azoxystrobin treated soils in field 1 and 11.5 and 17.8 days in field 2 soils, respectively. Residue levels of azoxystrobin in lettuce were not detected in filed 1 and field 2 soils, respectively.

본 연구에서는 azoxystrobin을 대상으로 작물재배 토양중 azoxystrobin의 잔류소실 및 상추로의 전이량을 파악하고자 하였다. 포장시험은 광주(GLT)와 용인(YLT)의 시설 재배지 두 곳에서 실시하였다. Azoxystrobin을 토양 중 서로 다른 두 농도로 처리한 후, 토양과 상추를 채취하였다. 토양과 상추 중 평균 회수율 범위는 86.9113.6%이었고, 변이계수는 0.14.6%였다. Azoxystrobin의 초기 토양농도는 시험포장 1에서 9.20, $11.00mg\;kg^{-1}$이었으며 농약처리 43일 후에 1.36, $2.70mg\;kg^{-1}$로 감소하였고, 시험포장 2에서는 초기 토양농도가 1.06, $2.23mg\;kg^{-1}$이었고 농약처리 36일 후에 0.20, $0.67mg\;kg^{-1}$으로 감소하였다. 시험포장 1에서의 토양 중 반감기는 저농도와 고농도 처리구에서 19.4, 23.3일이었으며, 시험포장 2에서는 11.5, 17.8일 이었다. 상추 중 azoxystrobin 잔류량은 GLT과 YLT 두 포장에서 0.02 미만으로, 검출되지 않았다.

Keywords

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Cited by

  1. 가지와 상추의 가공 중 azoxystrobin의 잔류량 변화 및 가공계수 vol.63, pp.1, 2017, https://doi.org/10.3839/jabc.2020.007