THE FATE OF 14C-FENITROTHION IN RICE-FISH MODEL ECOSYSTEM

THE FATE OF ¹⁴C-FENITROTHION IN RICE-FISH MODEL ECOSYSTEM

Sun Jinhe，

Gan Jianying，

Li Xingming

Nuclear Science and Techniques

Vol.1, No.4

pp.243-248

Published in print 01 Nov 1990

22200

The fate of fenitrothion in rice- fish ecosystem was studied using ¹⁴C- fenitrothion (¹⁴C- F) labelled at methoxyl and two application rates. The fenitrothion in water disappeared quickly, only 8 and 11 ppb in two treatments at harvest were detected respectively. Most of ¹⁴C- F in soil existed in upper layer and that in plants appeared in shoots. The extractable residues in cargo rice were 0.36 and 0.58 ppm in two treatments respectively. ¹⁴C- residues (¹⁴C- R) were concentrated in bones, next viscera, meat and scales. Total ¹⁴C- R in meat were 0.92 and 1.77 ppm at harvest. Comparing two treatments, the residue dynamics of fenitrothion in water, soil, plants and fish were similar. ¹⁴C- R in water and soil after harvest affected the rice- fish ecosystem in the next season. However, the extractable ¹⁴C- R in cargo rice, soil and water were very low.

Fenitrothion14C- fenitrothionRice- fishModel ecosystem

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