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KMID : 0903519970400020128
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
1997 Volume.40 No. 2 p.128 ~ p.133
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Adsorption Desorption , Leaching , and Degradation Pattern of Fungicide Fluazinam in the Soil Environment
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Abstract
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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.
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