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Effects of Repeated Applications of Chlorpyrifos on its Persistence and Soil Microbial Functional Diversity and Development of its Degradation Capability


Effects of repeated applications of chlorpyrifos on its persistence and soil microbial functional diversity were studied under laboratory conditions. The results showed that the degradation rate of chlorpyrifos increased whereas its inhibitory effect on soil microbial communities gradually decreased with application frequency of chlorpyrifos. A bacterial strain DSP capable of utilizing chlorpyrifos as a sole source of carbon and energy was isolated 21 days after the third chlorpyrifos application, which indicated that the capability of soil microorganism for degrading chlorpyrifos was formed during the experiment. It could be concluded that repeated applications of chlorpyrifos had no lasting impact on soil health.

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This work was supported by a grant from the National High Technology Research and Development Program of China (No. 2006AA06Z386 and 2007AA06Z306), China Postdoctoral Science Foundation (No. 20070421174), National Natural Science Foundation of China (Nos. 30771254), National Key Technology R & D Program of China (2006BAI09B03).

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Correspondence to Y. L. Yu.

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Fang, H., Yu, Y.L., Wang, X.G. et al. Effects of Repeated Applications of Chlorpyrifos on its Persistence and Soil Microbial Functional Diversity and Development of its Degradation Capability. Bull Environ Contam Toxicol 81, 397–400 (2008).

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  • Chlorpyrifos
  • Degradation
  • Microbial diversity
  • Repeated application