Washoff of residual photosystem II herbicides from sugar cane trash under a rainfall simulator
Article
Article Title | Washoff of residual photosystem II herbicides from sugar cane trash under a rainfall simulator |
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ERA Journal ID | 1349 |
Article Category | Article |
Authors | Dang, Aaditi (Author), Silburn, Mark (Author), Craig, Ian (Author), Shaw, Melanie (Author) and Foley, Jenny (Author) |
Journal Title | Journal of Agricultural and Food Chemistry |
Journal Citation | 64 (20), pp. 3967-3974 |
Number of Pages | 8 |
Year | 2016 |
Publisher | American Chemical Society |
Place of Publication | United States |
ISSN | 0021-8561 |
1520-5118 | |
Digital Object Identifier (DOI) | https://doi.org/10.1021/acs.jafc.5b04717 |
Web Address (URL) | http://pubs.acs.org/doi/abs/10.1021/acs.jafc.5b04717 |
Abstract | Herbicides are often applied to crop residues, but their fate has not been well studied. We measured herbicide washoff from sugar cane trash during simulated rainfall, at 1, 8, and 40 days after spraying (DAS), to provide insight into herbicide fate and for use in modeling. Herbicides included are commonly used in the sugar industry, either in Australia or in Brazil. Concentrations of all herbicides and applied Br tracer in washoff declined exponentially over time. The rate of washoff during rainfall declined with increasing DAS. Cumulative washoff as a function of rainfall was similar for most herbicides, although the most soluble herbicides did have more rapid washoff. Some but not all herbicides became more resistant to washoff with increasing DAS. Of the total mass washed off, 80% washed off in the first 30 mm (∼40 min) of rainfall for most herbicides. Little herbicide remained on the trash after rainfall, implying nearly complete washoff. |
Keywords | Great Barrier Reef, water quality, ametryn, tebuthiuron, hexazinone, atrazine, metolachlor, diuron, bromide |
ANZSRC Field of Research 2020 | 410604. Soil chemistry and soil carbon sequestration (excl. carbon sequestration science) |
410605. Soil physics | |
300202. Agricultural land management | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Faculty of Engineering and Surveying |
Department of Natural Resources and Mines, Queensland | |
School of Civil Engineering and Surveying | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q3vxy/washoff-of-residual-photosystem-ii-herbicides-from-sugar-cane-trash-under-a-rainfall-simulator
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