Adsorption-Desorption, Leaching, and Degradation Pattern of Fungicide Fluazinam in the Soil Environment

살균제 Fluazinam의 토양환경 중 흡.탈착, 용탈 및 분해양상

  • Hu, Won (Department of Agricultural Chemistry, College of Agriculture, Kyungpook National University) ;
  • Lee, Seog-June (Department of Agricultural Chemistry, College of Agriculture, Kyungpook National University) ;
  • Kim, Jang-Eok (Department of Agricultural Chemistry, College of Agriculture, Kyungpook National University)
  • 허원 (경북대학교 농과대학 농화학과) ;
  • 이석준 (경북대학교 농과대학 농화학과) ;
  • 김장억 (경북대학교 농과대학 농화학과)
  • Published : 1997.04.28

Abstract

This study was conducted to evaluate the adsorption, desorption, leaching and degradation pattern of fungicide fluazinam in the soil environment under the laboratory conditions. The mode of isothermal adsorption of fluazinam in soil was coincident with the Freundlich equation. The adsorption amount of fluazinam was much higher on soils containing organic matter than on soils oxidized with hydrogen peroxide. The presence of organic matter, humic acid or fulvic acid, increased the adsorption amount of fluazinam on soils. The Freundlich constant K was much higher in soil added with humic acid than in soil added with fulvic acid. The desorption ratio of fluazinam adsorbed to soil was increased by removal of organic matter. In leaching experiment using soil column, the fluazinam applied on the soil surface was not moved down to the bottom of soil and was not detected in leachate water. The degradation of fluazinam was faster in Soil I with rich organic matter than Soil II with poor organic matter, in non-sterilized soil than sterilized soil, and in flooded soil than unflooded soil.