EDAFOLOGIA, Vol. 10 (1), pp. 1-5, 2003
A. ALBARRÁN 1, R. CELIS 2, M.C. HERMOSÍN 2, A. LÓPEZ-PIÑEIRO 1 y J. CORNEJO 2
1 Universidad de Extremadura. Avda. Elvas s/n. 06071 Badajoz, España. e-mail: angliso@unex.es
2 Instituto de Recursos Naturales y Agrobiología de Sevilla. CSIC. Avda. Reina Mercedes 10. 41012 Sevilla, España. e-mail: rcelis@irnase.csic.es
Abstract. Organic waste addition to agricultural soils, as a disposal strategy and to improve the structural characteristics and organic matter content of soils, can affect the behavior of other compounds that are also used in agriculture, such as pesticides. In this work, we have evaluated the effects of the addition of the final residue of the current technology for olive-oil extraction (orujo) on the sorption, leaching and biodegradation of the herbicide simazine in a low organic matter content soil. The addition of the waste increased the retention capacity of the soil and reduced simazine leaching and degradation. The results show the need of considering this kind of side-effects in order to optimize the combined use of organic amendments and agrochemicals as agricultural practices.
Key words: Simazine, orujo, adsorption, leaching, mineralization, organic wastes