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首页> 外文期刊>Catena: An Interdisciplinary Journal of Soil Science Hydrology-Geomorphology Focusing on Geoecology and Landscape Evolution >Soil properties and charcoal dynamics of burnt soils in the Tyrolean Limestone Alps.
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Soil properties and charcoal dynamics of burnt soils in the Tyrolean Limestone Alps.

机译：蒂罗尔石灰石阿尔卑斯山的烧土的土壤特性和木炭动力学。

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摘要

We investigated soil samples of four burnt slopes in the Tyrolean Limestone Alps of varying age after fire (wildfires occurred in 2003, 1962, 1946, and in 1250 AD) as well as of the surrounding soils that were not affected by combustion. Charcoal content of the O and A horizons was determined as well as pH, soil organic matter content and C/N ratio. The results showed a background value of charcoal in all soils with a dominance of charcoal in the O horizon of the youngest burnt slope (2003). With vegetation and soil recovery, charcoal concentrations decreased and zones of maximum charcoal accumulation shifted further down in the soil profile. Soil organic matter contents significantly decreased on burnt slopes, which is due to vegetation combustion, long-term vegetation changes and intensified erosion. However, in the long-term, re-accumulation occurs due to the recovery of vegetation. Soil pH increased by combustion and was further modified by an altered vegetation composition. C/N ratios remained largely stable, with the soil N content reacting more sensitive to combustion. The results demonstrate that Alpine regions react sensitively to wildfires due to the steep slope angle, which causes not only short-term but also long-term modification in vegetation composition and erosion.
机译：我们调查了蒂罗尔州石灰岩阿尔卑斯山中四个烧过的斜坡的土壤样品，这些斜坡在火灾后年龄不同（2003年，1962年，1946年和公元1250年发生野火）以及不受燃烧影响的周围土壤。测定了O和A层的木炭含量，以及pH，土壤有机质含量和C / N比。结果表明，在所有土壤中，木炭的本底值在最年轻的燃烧坡度的O层中以木炭为主（2003年）。随着植被和土壤的恢复，木炭浓度降低，最大木炭积累区域在土壤剖面中进一步下降。由于植被燃烧，长期植被变化和侵蚀加剧，土壤有机质含量在坡地上明显减少。但是，从长期来看，由于植被的恢复，会发生重新积累。土壤pH值通过燃烧而增加，并通过改变植被组成而进一步改变。 C / N比在很大程度上保持稳定，土壤中的N含量对燃烧更敏感。结果表明，由于陡峭的倾斜角度，高山地区对野火敏感，这不仅会短期影响植被，而且会造成长期侵蚀。

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