Persistence and Movement of Trieyclazole in the Rice-Water-Soil System of Rice Field
三环唑在稻-土-水体系中的持留、迁移变化

Reported in this paper is the residues and variations of tricyclazole in the rice-water-soil system of rice fields in Zhejiang Province by means of field tests and simulation. The results showed that the adsorption curves of three kinds of soil comformed to Freudliche adsorption equation. Xiaoshan loamy silt had less adsorption ability of tricyclazole than the other two soils. In the pot tests, there existed obvious differences of its leaching ability between loamy silt and silty loam with same eluting water volume. In practically applied dosages, tricyclazole was able to leach down to ground water. Its leaching ability in the soils followed this order: loamy silt> silty loam>clay loam. It could move laterally to the ponds around by flowing water. Rice plants adsorbed tricyclazole from soil-water system, and a very remarkable relationship appeared between its amount taken up by rice plants and its concentrations in water (at 0.01 level). In this research, the tricyclazole residues were determined by using GC-FPD (S-Mode)after the samples of soils and rice plants had been purified by coagulation.