Behaviour of Fungicide $^{14}C-Propiconazole$ in Rice Plant Grown-Lysimeter Soil

Behaviour of a fungicide was investigated in a rice plant grown-lysimeter soil. The lysimeter was composed of soil cores of silty clay. plus propiconazole was applied on the surface of lysimeter soil at a rate of 0.12kg/10a after rice transplanting. The application was done consecutively for two years. The behaviours of propiconazole in the lysimeter soil were investigated by measuring the amounts of , , the residues distributed in each soil segment and taken up by rice plants. The relative amounts of leached from the lysimeter were the background level of the applied throughout expeiment. The amounts of evolved from the lysimeter were 5.7 and 7.8% of the original in the 1st and 2nd treatment, respectively. The amounts of volatile substances soil were the background level throughout experiment, which indicated that propiconazole was stable chemically in the experimental condition. The absorbed and translocated into rice plants were 3.7 and 7.6% in 1st and 2nd treatment, respectively. The in the soil layer of the lysimeter was distributed mainly in the depth of 0 to 20cm, which suggested propiconazole did not have the risk of groundwater contamination.