The increasing frequency and extent of forest fires cause severe temporal effects on soil properties, which knowledge about is controversial or lacking. So, the research aimed to evaluate changes in Mediterranean Andosol properties (pH, water and organic matter contents, C and N concentrations) and total and available Ca, Cu, Fe, K, Mg, Na, Ni and Pb concentrations 1 and 2 years after fire occurrence, comparing them to the pre-fire ones. The results underline that, in the investigated Mediterranean Andosols, fire caused significant decrease in water and organic matter contents, C, Fe and Mg total concentrations as well as significant increase in pH, total Ca, K, Fe, Na concentrations and available Cu and Pb fractions. After fire, temporal changes of soil element concentrations occurred at different speeds, as Ca, Cu, Fe, Mg and Ni total concentrations changed already 1 year after fire occurrence; whereas, K and Na total concentrations changed only after two years. Finally, 2 years after fire none of the investigated soil properties reached the pre-fire values, suggesting a whole worsening of soil conditions. The early responses of soils to fire are useful to predict the evolution of the system, the relationships between below and above ground and to provide useful tools for management practices.

森林大火的发生频率和范围不断增加，对土壤特性造成了严重的暂时性影响，有关这一方面的知识尚有争议或缺乏。因此，该研究旨在评估地中海Andosol性质（pH，水和有机物含量，C和N浓度）以及总有效Ca，Cu，Fe，K，Mg，Na，Ni和Pb浓度（有效期为1年和2年）的变化。发生火灾后，将其与火灾前的情况进行比较。结果表明，在被调查的地中海Andosols中，大火导致水和有机质含量，C，Fe和Mg总浓度显着下降，并且pH，Ca，K，Fe，Na的总浓度以及有效Cu和Cu显着增加。铅含量。火灾后，土壤元素浓度的时间变化以不同的速度发生，例如钙，铜，铁，火灾发生一年后，镁和镍的总浓度已经发生了变化；而钾和钠的总浓度仅在两年后发生变化。最后，火灾后2年，所有调查的土壤特性均未达到火灾前的值，表明土壤状况整体恶化。土壤对火的早期响应可用于预测系统的演变，地下与地面之间的关系，并为管理实践提供有用的工具。