Rapid degradation of bensulfuron-methyl upon repeated application in paddy soils

Abstract： Rapid degradation of bensulfuron-methyl upon repeated application in paddy soils was studied. The results showed that the DT50of bensulfuron-methyl was reduced from 16 d to 9 d in soil with one-year bensulfuron-methyl application. Rapid bensulfuron-methyl degradation was happened to previously untreated soil by addition 5% rapid bensuifuron-methyl adapted soil and was inhibited following pre-treatment with broad-spectrum antibiotic chloramphenicol. In bensulfuron-methyl adapted soil mineralisation of 14C labeled bensulfuronmethyl to 14 CO2 occurred at a faster rate than with previously untreated soil. It was concluded that rapid bensulfuron-methyl degradation upon repeated application is probably linked to the adaptation of soil bacteria which can utilize bensulfuron-methyl as a source of carbon and energy. 作 者： XIE Xiao-mei    LIU Wei-ping    Abid SUBHANI   作者單位： XIE Xiao-mei,Abid SUBHANI(College of Environmental and Resource Sciences, Department of Resources Science, Zhejiang University, Hangzhou 310029, China)

LIU Wei-ping(College of Environmental and Resource Sciences, Department of Environmental Science, Zhejiang University,Hangzhou 310029, China) 

期 刊： 環境科學學報(英文版)  ISTICSCI   Journal： JOURNAL OF ENVIRONMENTAL SCIENCES  年，卷(期)： 2004, 16(1)  分類號： X131.3  Keywords： bensulfuron-methyl    rapid degradation    paddy soil