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Influence of organic amendments on diuron leaching through an acidic and a calcareous vineyard soil using undisturbed lysimeters |
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| Authors: | Thevenot M Dousset S Rousseaux S Andreux F |
| Institution: | a UMR 1229 Microbiologie et Géochimie des Sols, CMSE, INRA - Université de Bourgogne, UFR des Sciences de la Terre et de l'Environnement, 6 Boulevard Gabriel, 21000 Dijon - France b UMR 5561 Biogéosciences, CNRS - Université de Bourgogne, UFR des Sciences de la Terre et de l'Environnement, 6 Boulevard Gabriel, 21000 Dijon - France c EA 4149 Laboratoire de Recherche en Vigne et Vin, Institut Universitaire de la Vigne et du Vin, rue Claude Ladrey, 21000 Dijon - France |
| Abstract: | The influence of different organic amendments on diuron leaching was studied through undisturbed vineyard soil columns. Two composts (A and D), the second at two stages of maturity, and two soils (VR and Bj) were sampled. After 1 year, the amount of residues (diuron + metabolites) in the leachates of the VR soil (0.19-0.71%) was lower than in the Bj soil (4.27-8.23%), which could be explained by stronger diuron adsorption on VR. An increase in the amount of diuron leached through the amended soil columns, compared to the blank, was observed for the Bj soil only. This result may be explained by the formation of mobile complexes between diuron and water-extractable organic matter (WEOM) through the Bj soil, or by competition between diuron and WEOM for the adsorption sites in the soil. For both soils, the nature of the composts and their degree of maturity did not significantly influence diuron leaching. |
| Keywords: | Soil column Herbicide Dissolved organic matter Transport |
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