Pérdidas de carbono orgánico por erosión en andosoles forestales de las Islas Canarias

  1. C.D. ARBELO 1
  2. A. RODRÍGUEZ RODRÍGUEZ 1
  3. J.L. MORA 1
  4. J.A. GUERRA 1
  5. C.M. ARMAS 1
  1. 1 Universidad de La Laguna
    info

    Universidad de La Laguna

    San Cristobal de La Laguna, España

    ROR https://ror.org/01r9z8p25

Revue:
Edafología

ISSN: 1135-6863

Année de publication: 2003

Volumen: 10

Número: 2

Pages: 221-227

Type: Article

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D'autres publications dans: Edafología

Résumé

The overall objective of this paper is to carry out a first assessment of soil organic carbon(SOC) loss mechanisms due to water erosion in Canary Islands andosols. The study is performed in expe-rimental erosion plots. The soils are classified as Fulvic Andosols or Ultic Fulvudands. The measuredvalues of organic carbon (OC) eroded in sediments oscillate around 116±30 gC kg-1, implying losses ofOC bonded to the solid phase of 114 gC m-2año-1. It has been observed that regardless of the aggregatesize fraction eroded, the greatest enrichment ratios (ER) are produced for the non-oxidizable SOC(OSOC)(ER = 1.12-1.60). The physical protection of OSOC in the larger aggregates and the chemical sta-bilization of adsorbed SOC (ASOC) in the smaller-sized ones semm to be the main mechanisms of OCsequestration in these andosols. Moreover, the predominante in the sediments of the apparently more labi-le forms (OSOC), leads to the assumption that the eroded SOC act in a significant manner as a source ofatmospheric CO2.

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