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Runoff of Azoxystrobin Applied in Pepper Field-lysimeter

고추 재배 포장 라이시메타를 이용한 Azoxystrobin의 유출 평가

  • Kim, Chan-Sub (Department of Agro-Food Safety and Crop Protection, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Lee, Hee-Dong (Department of Agro-Food Safety and Crop Protection, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Son, Kyeong-Ae (Department of Agro-Food Safety and Crop Protection, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Gil, Geun-Hwan (Department of Agro-Food Safety and Crop Protection, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Ihm, Yang-Bin (Department of Agro-Food Safety and Crop Protection, National Institute of Agricultural Sciences, Rural Development Administration)
  • 김찬섭 (농촌진흥청 국립농업과학원 농산물안전성부) ;
  • 이희동 (농촌진흥청 국립농업과학원 농산물안전성부) ;
  • 손경애 (농촌진흥청 국립농업과학원 농산물안전성부) ;
  • 길근환 (농촌진흥청 국립농업과학원 농산물안전성부) ;
  • 임양빈 (농촌진흥청 국립농업과학원 농산물안전성부)
  • Received : 2016.09.02
  • Accepted : 2016.09.28
  • Published : 2016.09.30

Abstract

To investigate runoff losses of azoxystrobin from the field by rainfall, the influence of slope degree and length on runoff rate of azoxystrobin from the pepper field were measured. The SC type formulation was applied at the pepper field lysimeter in 2004 and 2005. The azoxystrobin washed down from plant were from 21% to 68% of what the applied. Concentrations of azoxystrobin in the first runoffs were less than $50{\mu}gL^{-1}$. Runoff losses were from 0.26% to 0.59% for 10% slope-plots, from 0.66% to 0.96% for 20% slope-plots, and from 0.84% to 1.78% for 30% slope-plots. Then they decreased with increasing slope-length. Runoff loss of azoxystrobin was closely related to volume of runoff, it was reduced by the ridge and the mulching effect.

작물재배 관행과 지형에 의한 농약의 유실양상의 차이를 파악하고자 고추재배 경사지 포장에서 농약유출 실험을 수행하였다. Azoxystrobin 20% 액상수화제를 2004년과 2005년에 살포한 후 작물체를 씻어 내리는 빗물과 유출수 중 azoxystrobin의 잔류 양상을 추적하였다. 농약살포 후 작물체 표면에 부착되었던 azoxystrobin이 빗물에 씻겨 내리는 정도는 살포량의 24~68% 수준이었다. Azoxystrobin의 첫 번째 유출농도는 $50{\mu}gL^{-1}$ 미만이었고, 10% 경사구의 유출률은 0.26~0.59%, 20% 경사구의 유출률은 0.66~0.96%, 30% 경사구의 유출률은 0.84~1.78%로 경사장의 증가에 따라 줄어들었다. Azoxystrobin의 유출률은 유출수량과 관계가 밀접하고, 단위면적당 유출수량은 두둑과 멀칭효과에 의해 감소하였다.

Keywords

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