Mineralogical and chemical modifications in soils affected by a forest fire in the Mediterranean area

Iglesias, Teresa; Cala, V.; González, Julio

doi:10.1016/s0048-9697(97)00173-3

Cited by 55 publications

(44 citation statements)

References 12 publications

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“…Increasing the temperature of soil heating produced a parallel increment in soil pH and EC (Table 4), in agreement with what has been observed by other authors (Soto and Díaz-Fierros, 1993;Iglesias et al, 1997;Quintana et al, 2007;Úbeda et al, 2009). Both effects are commonly observed in burnt soils, and they are due to the denaturalization of organic acids and to the release of cations from burnt organic matter, respectively (Certini, 2005).…”

Section: Soil Heating Experimentssupporting

confidence: 90%

Effect of a compost mulch on seed germination and plant growth in a burnt forest soil from NW Spain

Paradelo

Rey

Cancelo-González

et al. 2012

J. Soil Sci. Plant Nutr.

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In this work, a revegetation experiment was performed on a forest soil artificially burnt in the laboratory, and the results of the soil without treatment were compared to those of the soil capped with an organic mulch. Plant biomass, as well as the variation of pH, electric conductivity (EC), and phytotoxicity with depth, were recorded. Only a very low plant growth was observed in the uncapped soil. The substrateamended soil had a higher production than the uncapped soil, despite showing an increased EC due to the mulch. The increase of pH or salinity during burning can be discarded as the cause of the different plant growth, because the values reached were not high enough to justify the negative effect observed. The determination of phytotoxicity after burning the soil at temperatures between 100ºC and 500ºC suggested that the problems observed for seed germination in the burnt soil might be linked to the formation of undetermined phytotoxic substances after soil heating at a temperature near 200ºC. Although polycyclic aromatic hydrocarbons followed the same trend as phytotoxicity with temperature, their concentrations in soil were too low to be the cause of the effects observed, so they can be discarded as playing an important role in phytotoxicity.

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Section: Soil Heating Experimentssupporting

confidence: 90%

Effect of a compost mulch on seed germination and plant growth in a burnt forest soil from NW Spain

Paradelo

Rey

Cancelo-González

et al. 2012

J. Soil Sci. Plant Nutr.

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“…Substantial amounts of organic matter are lost at 300°C and higher temperatures affect the composition of the soil minerals and soil texture (Sertsu and Sánchez, 1978;Iglesias et al, 1997;Ketterings et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Influence of heating on various properties of six Mediterranean soils. A laboratory study

et al. 2008

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“…Wildfires can burn vegetation and litter, affecting the soil by different thermal gradients depending on heating duration, depth and fire intensity (Iglesias et al, 1997). The impact of fire is usually evident only in the upper 5 cm of soil, since temperature rarely exceeds 150°C below this depth (Raison et al, 1986;Miranda et al, 1993).…”

Section: Introductionmentioning

confidence: 99%

Changes in a Humic Cambisol heated (100–500 °C) under laboratory conditions: The significance of heating time

2007

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The influence of the temperature and its duration, that are among the most important components to determine the fire effects on soil properties, were studied in the 0-5 cm layer of a Humic Cambisol developed over siliceous conglomerates and under a shrub of Erica australis. Soil was sandy loam with 8.5 g 100 g − 1 of organic matter, pH of 4.7 and available P about 0.16 mg kg − 1 . The water stability index (WSI) was 64.9, which was considered good. Differential thermal analysis (DTA) showed the presence of two peaks, one endothermic until 177°C and other exothermic between 229°C and 579°C. Samples were heated at 100°C, 200°C and 500°C during 5, 15, 30 and 60 min after reaching the selected temperature. To avoid a temperature gradient in the profile a sample layer of 2 cm depth was used. Soil heating to 100°C at the four heating times and to 200°C for 5 min did not produce significant changes in pH, organic matter, total N, C/N ratio, available P, extractable cations and WSI. Soils heated to 200°C for 15, 30 and 60 min and 500°C for 5 min, showed a significant increase in available P (from 0.9 to a maximum of 17.6 mg kg −1 ) and divalent cations (Ca 2+ from 4.4 to 46.3 and Mg 2+ from 1.5 to 8.7 mg kg − 1 ). For soils heated to 500°C for 15, 30 and 60 min, a clear increase in soluble Na + content (from 0.5 to 1.8 mg kg −1 ) and pH (from 5.5 to 8.1), in addition to a significant decrease in organic matter (from 8.7% to 2.4%) was detected. As a consequence an important decrease in WSI was found (from 64.9% to 54.3%).

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Mineralogical and chemical modifications in soils affected by a forest fire in the Mediterranean area

Cited by 55 publications

References 12 publications

Effect of a compost mulch on seed germination and plant growth in a burnt forest soil from NW Spain

Effect of a compost mulch on seed germination and plant growth in a burnt forest soil from NW Spain

Influence of heating on various properties of six Mediterranean soils. A laboratory study

Changes in a Humic Cambisol heated (100–500 °C) under laboratory conditions: The significance of heating time

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