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Field-scale study of the variability in pesticide biodegradation with soil depth and its relationship with soil characteristics
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Rodriguez-Cruz, M. Sonia, Jones, Julie E. and Bending, Gary D.. (2006) Field-scale study of the variability in pesticide biodegradation with soil depth and its relationship with soil characteristics. Soil Biology & Biochemistry, Volume 38 (Number 9). pp. 2910-2918. ISSN 0038-0717
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Official URL: http://dx.doi.org/10.1016/j.soilbio.2006.04.051
Abstract
The extent of within-field spatial variability of pesticide degradation was characterised in topsoil and subsoil, using the compounds isoproturon, bentazone and mecoprop, which are major contaminants of groundwater and surface freshwater in Europe. Twenty topsoil samples from 0 to 15 cm depth and twenty subsoil samples from 50 to 60 cm depth were collected from a single agricultural field within a 160 x 90 grid. It was shown that degradation rates of all compounds declined with soil depth. Variability of pesticide degradation rates, pesticide sorption and formation of non-extractable pesticide residues was higher in subsoil relative to topsoil. Furthermore, in the subsoil, there was variation in large scale soil physicochemical composition, which did not occur in topsoil. The greater variability in pesticide degradation rates in subsoil relative to topsoil could be the result of a greater range of degradation kinetics, which could reflect greater spatial variability in the distribution and/or activities of pesticide metabolising communities. (c) 2006 Elsevier Ltd. All rights reserved.
| Item Type: | Journal Article |
|---|---|
| Subjects: | S Agriculture |
| Divisions: | Faculty of Science > Life Sciences (2010- ) > Warwick HRI (2004-2010) |
| Journal or Publication Title: | Soil Biology & Biochemistry |
| Publisher: | Elsevier |
| ISSN: | 0038-0717 |
| Date: | September 2006 |
| Volume: | Volume 38 |
| Number: | Number 9 |
| Number of Pages: | 9 |
| Page Range: | pp. 2910-2918 |
| Identification Number: | 10.1016/j.soilbio.2006.04.051 |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| URI: | http://wrap.warwick.ac.uk/id/eprint/33110 |
Data sourced from Thomson Reuters' Web of Knowledge
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