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Evaluation of pastures for horses grazing on soils polluted by trace elements

AutorMadejón, Paula ; Domínguez, María Teresa ; Murillo Carpio, José Manuel
Palabras clavePasture composition
Trace element ingestion
Horses’ hair
Horses’ faeces
Fecha de publicaciónmay-2009
CitaciónEcotoxicology 18(4): 417-428 (2009)
ResumenPasture established on polluted soil may pose a risk to grazing livestock creating a requirement for mechanical management which may affect biodiversity and expend energy. The risk associated with managing pasture by grazing horses (non-edible livestock) is being assessed in the Guadiamar Valley (SW Spain), where soils are polluted with trace elements following a major pollution incident. Soil pollution does not affect biomass production or floristic composition of pasture, although both variables influence trace element accumulation in herbage. Element concentrations in herbage are below maximum tolerable limits for horses. Faecal analysis showed regulated absorption of essential elements, while non-essential elements seemed preferentially excreted. Elemental content of horse hair did not differ in animals from polluted and control pastures. If pastures are managed by grazing, periodic monitoring is recommended in view of the long-term chronic trace element exposure in these systems. 2008 Springer Science+Business Media, LLC.
Descripción12 pages,3 figures, 9 tables, 46 references.-- Adjuntamos página de errata.
Versión del editorhttp://dx.doi.org/10.1007/s10646-009-0296-3
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