2024-03-29T05:39:13Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/611562018-09-10T10:30:33Zcom_10261_15com_10261_6col_10261_268
Use of modified montmorillonites to reduce herbicide leaching in sports turf surfaces: laboratory and field experiments
Cornejo Hermosín, L.
Celis, R.
Domínguez Cornejo, C.
Hermosín, M.C.
Cornejo, J.
Ministerio de Educación y Ciencia (España)
Junta de Andalucía
The risk of ground water contamination resulting from rapid leaching of highly mobile pesticides can be reduced through the application of the pesticide adsorbed on a suitable carrier, which limits the amount of pesticide readily available for undesirable leaching losses. The herbicide simazine was used as a model of highly mobile herbicide applied in sports turf surfaces. We investigated the ability of selectively modified montmorillonites to retard the release of the herbicide into the aqueous soil solution and to reduce herbicide leaching from the soil. Fe3+-Wyoming montmorillonite (Fe-SW), hexadecyl trimethylammonium-Arizona montmorillonite (HDTMA-SA) and octadecylammonium-Arizona montmorillonite (ODA-SA) were mixed with simazine following two different protocols. The resulting complexes were assayed as slow release formulations of the herbicide. In the laboratory, batch release and column leaching tests showed that all montmorillonite-based formulations of simazine released the herbicide slowly in aqueous solution, which resulted in reduced simazine leaching through soil columns compared to the application of the free herbicide. Pretreatment of the soil surface layer with Fe-SW was also effective in retarding the leaching of free simazine through the soil column compared to its leaching in untreated soil columns. In a field experiment, a Fe-SW-based formulation of simazine was applied to 1 m2 field plots, previously seeded with Princess 77 bermudagrass to simulate a typical sports turfgrass surface. The field experiment revealed that the montmorillonite-based formulation of simazine displayed similar herbicidal efficacy and slower vertical movement of the herbicide compared to a standard commercial formulation. This study shows the usefulness of montmorillonite to reduce ground water contamination by intensive herbicide application in high-risk scenarios such as sports turfgrass surfaces.
This work has been financed by the Spanish Ministry of Education and Science (MEC/FEDER) through the project AGL2005-05063-C02-01 and by Junta de Andalucía through Research Group RNM-124 and Project P07-AGR-3077.
Peer Reviewed
2012-11-26T12:09:27Z
2012-11-26T12:09:27Z
2008
2012-11-26T12:09:27Z
artículo
http://purl.org/coar/resource_type/c_6501
doi: 10.1016/j.clay.2008.01.008
issn: 0169-1317
Applied Clay Science 42(1-2): 284-291 (2008)
http://hdl.handle.net/10261/61156
10.1016/j.clay.2008.01.008
http://dx.doi.org/10.13039/501100011011
en
none
Elsevier