Reduction of Nutrient Losses with Eroded Sediments by Post-Fire Soil Stabilisation Techniques

Gómez Rey, M.X.; Couto Vázquez, A.; García Marco, Sonia; Vega, J. A. y González Prieto, S.J. (2013). Reduction of Nutrient Losses with Eroded Sediments by Post-Fire Soil Stabilisation Techniques. "International Journal of Wildland Fire", v. 22 ; pp. 696-706. ISSN 1049-8001.

Descripción

Título: Reduction of Nutrient Losses with Eroded Sediments by Post-Fire Soil Stabilisation Techniques
Autor/es:
  • Gómez Rey, M.X.
  • Couto Vázquez, A.
  • García Marco, Sonia
  • Vega, J. A.
  • González Prieto, S.J.
Tipo de Documento: Artículo
Título de Revista/Publicación: International Journal of Wildland Fire
Fecha: 2013
Volumen: 22
Materias:
Escuela: E.U.I.T. Agrícolas (UPM)
Departamento: Química y Análisis Agrícola [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

After an experimental fire in steep shrub land in a temperate–humid region (north-west Spain), the effects of two post-fire stabilisation treatments (grass seeding and straw mulching) on the chemical properties of eroded sediments,and the amount of nutrients lost with them, we reevaluated relative to control burnt soil, over a period of 13 months. Total C and N concentrations, and d 13 C, indicated that sediments were mainly contributed by charred plant and litter material. The highest concentrations of extractable base cations in the sediments occurred during the first 3 months following fire, especially for Na and K. As treatments had little or no effect on nutrient concentration in sediments, differences in nutrient losses were due to the 10-fold lower sediment production in mulching compared with other treatments. In control and seeding treatments, the accumulated amounts of nutrients lost with sediments were 989–1028kgha 1 (C), 77kgha 1 (N), 1.9–2.4kgha 1 (Ca), 0.9–1.1kgha 1 (Mg), 0.48–0.55kgha 1 (NH 4 þ –N), 0.39–0.56kgha 1 (K), 0.19–0.34kgha 1 (Na) and , 0.1kgha 1 (P and NO 3 –N) . These values accounted for 22–25% (total C and N) and 5–12% (NH 4 þ –N, Ca, P and Mg) of available nutrients in ash, and 1.0–2.4% of those in ash þ topsoil. As nutrient and sediment losses were strongly correlated, the reduction of the latter by mulching application leads to an effective decrease of post-fire nutrient losses.

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ID de Registro: 26166
Identificador DC: http://oa.upm.es/26166/
Identificador OAI: oai:oa.upm.es:26166
Depositado por: Memoria Investigacion
Depositado el: 30 May 2014 09:33
Ultima Modificación: 22 Sep 2014 11:40
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