Observatorio de I+D+i UPM

Memorias de investigación
Artículos en revistas:
Characterization of soil phosphorus in a fire-affected forest Cambisol by chemical extractions and 31P-NMR spectroscopy analysis.
Año:2010
Áreas de investigación
  • Ciencia del suelo
Datos
Descripción
Estudio sobre el efecto a largo plazo del fuego sobre las diferentes formas de fósforo edáfico en en cambisoles dístricos formados sobre material granítico y bajo pinares de Pinus pinaster ubicados en las estribaciones del Sistema Central This study was conducted to investigate the long-term effects of fire on soil phosphorus (P) and to determine the efficiency of different procedures in extracting soil P forms. Different P forms were determined: labile forms (Olsen-P, Bray-P, and P extracted by anion exchange membranes: AEM-P); moderately labile inorganic and organic P, obtained by NaOH-EDTA extraction after removing the AEM-P fraction; and total organic and inorganic soil P. 31P-NMR spectroscopy was used to characterize the structure of alkali-soluble P forms (orthophosphate, monoester, pyrophosphate, and DNA). The studied area was a Pinus pinaster forest located at Arenas de San Pedro (southern Avila, Spain). The soils were Dystric Cambisols over granites. Soil samples were collected at 0¿2 cm, 2¿5 cm, and 10¿15 cm depths, two years after a fire in the burned area and in an adjacent unburned forest area. Fire increased the total N, organic C, total P, and organic and inorganic P content in the surface soil layer. In burned soil, the P extracted by the sequential procedure (AEM and NaOH+EDTA) was about 95% of the total P. Bray extraction revealed a fire-induced increase in the sorption surfaces. Analysis by chemical methods overestimated the organic P fraction in the EDTA¿NaOH extract in comparison with the determination by ignition procedure. This overestimation was more important in the burned than unburned soil samples, probably due to humification promoted by burning, which increased P sorption by soil particles. The fire-induced changes on the structure of alkali-soluble P were an increase in orthophosphate-P and a decrease in monoester-P and DNA-P.
Internacional
Si
JCR del ISI
Si
Título de la revista
SCIENCE OF THE TOTAL ENVIRONMENT
ISSN
0048-9697
Factor de impacto JCR
2,905
Información de impacto
Volumen
408
DOI
10.1016/j.scitotenv.2010.03.035
Número de revista
16
Desde la página
3342
Hasta la página
3348
Mes
JULIO
Ranking
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor(1): B. TURRIÓN NIEVES (UVA)
  • Autor(2): F. LAFUENTE (UVA)
  • Autor: Maria Jose Aroca Fernandez (UPM)
  • Autor(4): O. LÓPEZ (UVA)
  • Autor(5): R. MULAS (UVA)
  • Autor(6): C. RUIPÉREZ (UVA)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Ecología y Gestión Forestal Sostenible
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