Rapid degradation of bensulfuron-methyl upon repeated application in paddy soils |
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Authors: | Xie Xiao-mei Liu Wei-ping Abid Subhani |
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Institution: | 1. College of Environmental and Resource Sciences, Department of Resources Science, Zhejiang University, Hangzhou 310029, China 2. College of Environmental and Resource Sciences, Department of Environmental Science, Zhejiang University,Hangzhou 310029, China |
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Abstract: | Rapid degradation of bensulfuron-methyl upon repeated application in paddy soils was studied. The results showed that the DT _ 50 of 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 bensulfuron-methyl adapted soil and was inhibited following pre-treatment with broad-spectrum antibiotic chloramphenicol. In bensulfuron-methyl adapted soil mineralisation of 14 C labeled bensulfuron-methyl to 14 CO_2 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. |
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Keywords: | bensulfuron-methyl rapid degradation paddy soil |
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