Grassland fire effect on soil organic carbon reservoirs in a semiaridenvironment

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26 Citazioni (Scopus)

Abstract

The aim of this work was to investigate the effectof an experimental fire used for grassland managementon soil organic carbon (SOC) stocks. The study was carriedout on Hyparrhenia hirta (L.) Stapf (Hh) grassland and Ampelodesmosmauritanicus (Desf.) T. Durand & Schinz (Am)grasslands located in the north of Sicily. Soil samples werecollected at 0–5 cm before and after the experimental fire,and SOC was measured. During the grassland fire, soil surfacetemperature was monitored. Biomass of both grasseswas analysed in order to determine dry weight and its chemicalcomposition. The results showed that SOC varied significantlywith vegetation type, while it is not affected in theshort term by grassland fire. Am grassland stored more SOCcompared with Hh grassland thanks to lower content in thebiomass of the labile carbon pool. No significant differencewas observed in SOC before and after fire, which could becaused by several factors: first, in both grassland types themeasured soil temperature during fire was low due to thin litterlayers; second, in a semiarid environment, a higher mineralizationrate results in a lower soil carbon labile pool; andthird, the SOC stored in the finest soil fractions, physicallyprotected, is not affected by fire
Lingua originaleEnglish
Numero di pagine5
RivistaSolid Earth
Volume4
Stato di pubblicazionePublished - 2013

All Science Journal Classification (ASJC) codes

  • Soil Science
  • Geophysics
  • Geology
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Stratigraphy
  • Palaeontology

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