苄嘧磺隆在稻田土壤中反复施用后迅速降解。

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

作者信息

Xie Xiao-mei, Liu Wei-ping, Abid Subhani

机构信息

College of Environmental and Resource Sciences, Department of Resources Science, Zhejiang University, Hangzhou 310029, China.

出版信息

J Environ Sci (China). 2004;16(1):49-52.

PMID:14971451

Abstract

Rapid degradation of bensulfuron-methyl upon repeated application in paddy soils was studied. The results showed that the DT50 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 14C labeled bensulfuronmethyl to 14CO2 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.

摘要

研究了苄嘧磺隆在稻田土壤中反复施用后的快速降解情况。结果表明，在施用苄嘧磺隆一年的土壤中，苄嘧磺隆的半衰期从16天降至9天。通过添加5%的苄嘧磺隆适应土壤，苄嘧磺隆在先前未处理的土壤中快速降解，而用广谱抗生素氯霉素预处理后降解受到抑制。在苄嘧磺隆适应土壤中，14C标记的苄嘧磺隆矿化为14CO2的速率比先前未处理的土壤更快。得出的结论是，反复施用后苄嘧磺隆的快速降解可能与能够利用苄嘧磺隆作为碳源和能源的土壤细菌的适应性有关。