Biodegradation potentiality of metsulfuron-methyl in acclimated wheat rhizospheric soil
The degradation of metsulfuron-methyl in different soils, including acclimated and/or original wheat soil, rhizospheric and/or non-rhizospheric soil, was investigated by determining its residual concentration with HPLC. The results show that the degradation dynamics of metsulfuron-methyl in soil fit...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Zhejiang University Press
2008-09-01
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| Series: | 浙江大学学报. 农业与生命科学版 |
| Subjects: | |
| Online Access: | https://www.academax.com/doi/10.3785/j.issn.1008-9209.2008.05.016 |
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| Summary: | The degradation of metsulfuron-methyl in different soils, including acclimated and/or original wheat soil, rhizospheric and/or non-rhizospheric soil, was investigated by determining its residual concentration with HPLC. The results show that the degradation dynamics of metsulfuron-methyl in soil fitted to the first order reaction kinetics, the degradation rate constant was about 0.037-0.020 d<sup>-1</sup> and the half life was about 18.7-34.7 d. The soil, which had been planted wheat previously, promoted the degradation of metsulfuron-methyl significantly. The difference of degradation rate constant between the rhizospheric and non-rhizospheric soil was significant at the 0.05 probability level. The biodegradability of microbe was enhanced by domestication. On the 20th day, the removal rate of metsulfuron-methyl in the domesticated soil was higher 6 to 12 percent than that without domestication. Furthermore, the low concentration of metsulfuron-methyl was benefit for its degradation, the degradation rate constant of metsulfuron-methyl increased with its concentration reducing. The result above provides a theoretical feasibility for accelerating the degradation of the sulfonylurea herbicides in plant rhizospheric soil. |
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| ISSN: | 1008-9209 2097-5155 |