Gevao, Bondi and Jones, Kevin C. and Semple, Kirk T. (2005) Formation and release of non-extractable C-14-Dicamba residues in soil under sterile and non-sterile regimes. Environmental Pollution, 133 (1). pp. 17-24. ISSN 0269-7491
Full text not available from this repository.Abstract
The role of native soil microorganisms in the formation and release of non-extractable C-14-residues, previously treated with C-14- Dicamba, was investigated to examine their significance to the longer-term environmental effects on non-extractable pesticide residues. A 90 d study compared the fate of Dicamba under sterile and non-sterile regimes. In addition, soils were aged for 30 d and repeatedly extracted with a 0.01 M CaCl2 Solution, to an extraction end point, to produce non-extractable residues. The extracted soil containing non-extractable residues was mixed with clean soil that had been freshly spiked with non-labeled Dicamba at 0.2 mg kg(-1) to increase the bulk volume of the soil and stimulate microbial activity. Sub-samples were then introduced into microcosms to compare the extent of microbially facilitated release and mineralisation with release rates in sterile microcosms. The results show that microorganisms play a significant role in the formation and release of non-extractable Dicamba residues. The release of C-14-activity in sterile microcosms was linked to physical mixing of the extracted soil with field soil prior to the beginning of the incubations. The released C-14-activity may be further mineralized, reincorporated into humus, or taken up by plants or other soil inhabiting biota. (C) 2004 Elsevier Ltd. All rights reserved.
| Item Type: | Article |
|---|---|
| Journal or Publication Title: | Environmental Pollution |
| Uncontrolled Keywords: | pesticides ; non-extractable residues ; microbial activity ; extractability |
| Subjects: | G Geography. Anthropology. Recreation > GE Environmental Sciences |
| Departments: | Faculty of Science and Technology > Lancaster Environment Centre |
| ID Code: | 18553 |
| Deposited By: | Prof Kirk T. Semple |
| Deposited On: | 27 Oct 2008 10:47 |
| Refereed?: | Yes |
| Published?: | Published |
| Last Modified: | 26 Jul 2012 15:18 |
| Identification Number: | |
| URI: | http://eprints.lancs.ac.uk/id/eprint/18553 |
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