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Identification of reduced plant uptake and reduction effects of azoxystrobin, procymidone and tricyclazole by biochars and quicklime

토양 중 바이오차, 생석회를 이용한 azoxystrobin, procymidone 및 tricyclazole 저감화 효과 연구

  • Lee, Hyo-Sub (Chemical Safety Division, Agro-Food and Crop Protection Department, NAS) ;
  • Hwang, In-Seong (Residue Research Department, Hanearl Science) ;
  • Park, Sang-Won (Chemical Safety Division, Agro-Food and Crop Protection Department, NAS) ;
  • Choi, Geun-Hyoung (Chemical Safety Division, Agro-Food and Crop Protection Department, NAS) ;
  • Ryu, Song-Hee (Chemical Safety Division, Agro-Food and Crop Protection Department, NAS)
  • Received : 2020.08.06
  • Accepted : 2020.09.17
  • Published : 2020.09.30

Abstract

As pesticide safety was extended to agricultural environments and Positive List System was carried out, Pesticide safety management in soils has become even more important. To improve pesticide safety in soils needs the degradation technology of the residues in soils and reduce plant uptake of pesticides. In this study, biochars and quicklime as the degradation methods of pesticides (azoxystrboin, procymidone and tricyclazole) were used to identify the reduction effects. The experimental methods were putting biochars and quicklimes (0, 0.5, 1.0, 2.0% per 15 cm soil weight) in soils and analyzing the pesticide residues at 0, 10, 20, 35, 50 day. To identify the reduction effects of uptake from soil to korean cabbages (roots, leave, stems) by biochar treatment, the residues in samples were analyzed. As a results, azoxystrobin (36-96%), procymidone (40-117%) and tricyclazole (26-83%) were reduced in soils when treated with 2.0% quicklime (p<0.05). There were no reduction effect in soils when treated with 1.0% or less biochar. However, the amounts of residues translocated to roots (0.11-1.62 mg/kg), leave (0.05-0.29 mg/kg), stems (0.06-0.1 mg/kg) were reduced treated with 2.0% biochar treatments. The biochar and quicklime can be applicable to agricultural field to improve pesticide safety in soils.

농약의 안전범위 확대와 Positive List System이 시행되면서 토양 중 농약 안전관리방안에 대한 관심이 증가하였다. 토양 중 농약 안전관리를 위해서는 농경지 내 잔류량 저감화와 농산물 전이 저감방안이 대표적이다. 이번 연구에서는 토양 중 농약 안전성 향상을 위해서 시험농약은 azoxystrobin, procymidone 및 tricyclazole을 사용하였고, 저감화 방법으로 바이오차와 생석회를 이용했다. 실험방법은 토양에 바이오차와 생석회를 토양(15 cm) 무게 기준 0, 0.5, 1.0, 2.0%를 첨가한 후 0, 10, 20, 35, 50일 동안 경시적 잔류양상을 확인하였다. 바이오차 처리에 의한 작물 흡수·이행 저감효과 구명을 위해 얼갈이 배추의 뿌리, 잎, 줄기로 나뉘어 잔류량을 분석했다. 실험결과 생석회 처리할 때 2.0% 처리할 때 azoxystrobin (36-96%), procymidone (40-117%), tricyclazole (26-83%) 저감효과가 있었다(p <0.05). 바이오차 처리할 때 1.0% 이하 처리할 때 토양 중 잔류량 저감효과는 없었다. 그러나 바이오차 2.0%처리한 토양에서 재배한 얼갈이 배추의 뿌리(0.11-1.62 mg/kg), 잎(0.05-0.29 mg/kg), 줄기(0.06-0.1 mg/kg)에서 전이량이 감소되었다(p <0.05). 생석회와 바이오차는 농업에 활용성이 높은 토양개량제로 농약 안전관리방안에 이용할 수 있는 방법으로 판단된다.

Keywords

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