Bound 14 C-metsulfuron-methyl residue in soils
YE Qing-fu , DING Wei , WANG Hai-yan , HAN Ai-liang , SUN Jin-he
DOI:
Received June 11, 2004,Revised July 29, 2004, Accepted , Available online
Volume 17,2005,Pages 215-219
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Bound residue(BR) of 14 C-metsulfuron-methyl (14 C-BR) in seven kinds of soil was significantly negative-related to soil pH and positive-related to the clay content during the initial 20 d of incubation, but only was significantly negative-related to soil pH after 30 d incubation. Again, the soil pH was found to be the dominant factor affecting BR formation from 14 C-metsulfuron-methyl among the basic properties(soil pH, clay, OM and CEC etc.) of soil. The maximum content of 14 C-BR in the 7 soils accounted for 19.3% -52.6% of applied amount. In addition, the composition of the 14 C-BR in fluvio marine yellow loamy(S7 ) at the 90 d of incubation was identified using the coupling technique of LC-MS and isotope tracing method. The results showed that the 14 C-[2-amino-4-hydroxyl-6-methyl-1, 3, 5]-triazine, 14 C-[2-amino-4-methoxy-6-methyl-1, 3, 5]-triazine and 14 C-metsulfuron-methyl parent compound constituted the main components of the BR derived from 14 C-metsulfuron-methyl in the S7
