Behaviour of Fungicide $^{14}C-Propiconazole$ in a Lysimeter of Sandy Loam

사양토성 Lysimeter에서 살균제 $^{14}C-Propiconazole$의 행방

  • Kim, In-Seon (Department of Agricultural Chemistry, College of Agriculture, Chonnam National University) ;
  • Suh, Yong-Tack (Department of Agricultural Chemistry, College of Agriculture, Chonnam National University)
  • Published : 1998.06.30

Abstract

Behaviour of a fungicide $^{14}C-propiconazole$ was investigated in a field lysimeter of sandy loam soil. At 15 days after rice-seedling transplanting, $^{14}C-propiconazole$ was treated on the soil surface at the rate of 0.12 kg/10a. The cummulative $^{14}C-radioactivity$ in the leachate from the lysimeter soil was 4.4% of the applied $^{14}C$ for 16 weeks. Most radioactivity detected in leachate was in the form of parent compound. At the end of lysimeter experiment. $^{14}C$ radioactivity in lysimeter soil was 76.5% of the applied $^{14}C$ and more than 97% of $^{14}C$ in soil remained in the top 20 cm. The percent of $^{14}CO_2$ evolved from lysimeter soil was 7.8% of the applied $^{14}C$. The radioactivity remained in the rice straw after harvest was 7.2% of the applied $^{14}C$, while less than 0.1% of the applied $^{14}C$ was detected in flag leaf, ear, chaff and hulled rice, respectively.

사양토성 lysimeter에서 살균제 $^{14}C-propiconazole$의 행방을 조사하고자 하였다. 벼 이앙 15일 후 $^{14}C-propiconazole$을 0.12 kg/10a 수준으로 lysimeter 토양표면에 처리한 후 시기별로 용탈수, 토양 및 휘발성분중 방사능을 조사하였다. 약제처리 후 16주간 lysimeter토양에서 용탈된 방사능은 처리 방사능의 4.4%였으며, 대부분의 방사능은 모화합된 형태이었다. 약제처리 16주 후 토양에 잔류하는 방사능은 처리 방사능의 76.5%였으며 97% 이상이 토양표층 깊이 20 cm 이내에 존재하였다. Lysimeter 토양에서 생성된 $^{14}CO_2$는 처리 방사능의 7.8%였다. 벼 수확 후 볏짚에 잔류하는 방사능은 처리량의 7.2%였으며 지엽, 벼이삭, 왕겨 그리고 현미에서는 각각 0.1% 이하를 나타내었다.

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