Modelling pesticide degradation and leaching in conservation agriculture: Effect of no-till and mulching
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No-till and mulching are typical management operations in conservation agriculture (CA). To model pesticide degradation and leaching under a CA scenario, as compared to a conventional-tillage scenario (CT), the mulch module of the agro-hydrological model Daisy was extended. A Daisy soil column was parameterized with measurements of topsoil, mulch, and a realistic subsoil, and tested against published experimental data of pesticide fate in laboratory soil columns covered by mulch. Uncertainty and sensitivity analyses of the new Daisy version were conducted for a series of weather, soil, pesticide, and mulch parameters, using 4939 Monte Carlo simulations under each scenario. Results showed that there was no systematic difference in pesticide leaching from the topsoil (to the subsoil and directly to drains via drain-connected biopores) between CA and CT, but pesticide degradation and sorption were significantly different; degradation in the mulch and uppermost soil surface layer (0–3.5 cm) was larger in CA while degradation was larger in CT when considering the whole topsoil (0–30 cm). This difference for the whole topsoil could be explained by pesticide interception in CA in the part of the mulch not in direct contact with the soil where degradation is assumed not to occur. The sensitivity analysis highlighted non-influential parameters and seven parameters out of twenty-five to be better estimated to improve the accuracy of the predictions.
Originalsprog | Engelsk |
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Artikelnummer | 172559 |
Tidsskrift | Science of the Total Environment |
Vol/bind | 929 |
Antal sider | 14 |
ISSN | 0048-9697 |
DOI | |
Status | Udgivet - 2024 |
Bibliografisk note
Funding Information:
We would like to thank the team at Agrovi for helpful advice and insight in conducting this study within the framework of the \u201CGr\u00F8nne Marker og St\u00E6rke R\u00F8dder (GMSR)\u201D project. We would also like to acknowledge the technical help of Anja Weibel. The study received funding from The Velux Foundation (grant number 13602) and Promilleafgiftsfonden for Landbrug. Jeanne Vuaille is currently employed at the European Environment Agency (EEA). The text in this article solely expresses the author's own views and not those of the EEA.
Funding Information:
The study received funding from The Velux Foundation (grant number 13602 ) and Promilleafgiftsfonden for Landbrug .
Publisher Copyright:
© 2024 The Authors
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