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

Gómez Rey, M.X. and Couto Vázquez, A. and García Marco, Sonia and Vega, J. A. and 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.

Description

Title: Reduction of Nutrient Losses with Eroded Sediments by Post-Fire Soil Stabilisation Techniques
Author/s:
  • Gómez Rey, M.X.
  • Couto Vázquez, A.
  • García Marco, Sonia
  • Vega, J. A.
  • González Prieto, S.J.
Item Type: Article
Título de Revista/Publicación: International Journal of Wildland Fire
Date: 2013
ISSN: 1049-8001
Volume: 22
Subjects:
Faculty: E.U.I.T. Agrícolas (UPM)
Department: Química y Análisis Agrícola [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

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.

More information

Item ID: 26166
DC Identifier: http://oa.upm.es/26166/
OAI Identifier: oai:oa.upm.es:26166
Deposited by: Memoria Investigacion
Deposited on: 30 May 2014 09:33
Last Modified: 22 Sep 2014 11:40
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