GRAM (Grup de Recerca Mediterrània), Department of Physical Geography, University of Barcelona, Montalegre, 6, 08001 Barcelona, Spain.
Postdoctoral Fellowship Xunta de Galicia, Dept. Applied Economy, Universidad de Santiago de Compostela, Spain.
Sci Total Environ. 2016 Dec 1;572:1329-1335. doi: 10.1016/j.scitotenv.2016.01.115. Epub 2016 Feb 2.
This study examines the effects of a prescribed fire on soil chemical properties in the Montgrí Massif (Girona, Spain). The prescribed forest fire was conducted in 2006 to reduce understory vegetation and so prevent potential severe wildfires. Soil was sampled at a depth of 0-5cm at 42 sampling points on four separate occasions: prior to the event, immediately after, one year after and nine years after. The parameters studied were pH, electrical conductivity (EC), total carbon (C), total nitrogen (N), available phosphorus (P), potassium (K), calcium (Ca) and magnesium (Mg). All parameters (except pH) increased significantly immediately after the fire. One year after burning, some chemical parameters - namely, EC, available P and K - had returned to their initial, or even lower, values; while others - pH and total C - continued to rise. Total N, Ca and Mg levels had fallen one year after the fire, but levels were still higher than those prior to the event. Nine years after the fire, pH, total C, total N and available P are significantly lower than pre-fire values and nutrients concentrations are now higher than at the outset but without statistical significance. The soil system, therefore, is still far from being recovered nine years later.
本研究考察了计划火烧对蒙格利（西班牙赫罗纳）块状山地土壤化学性质的影响。该计划森林火灾于 2006 年进行，以减少林下植被，从而防止潜在的严重野火。在四个不同的时间点，在 42 个采样点采集了深度为 0-5cm 的土壤样本：事件发生前、事件发生后立即、一年后和九年后。研究的参数为 pH 值、电导率 (EC)、总碳 (C)、总氮 (N)、有效磷 (P)、钾 (K)、钙 (Ca) 和镁 (Mg)。除 pH 值外，所有参数在火灾后立即显著增加。燃烧一年后，一些化学参数 - 即 EC、有效 P 和 K - 已恢复到初始水平，甚至更低；而其他参数 - pH 值和总 C - 仍在继续上升。总 N、Ca 和 Mg 的水平在火灾后一年下降，但仍高于火灾前的水平。火灾九年后，pH 值、总 C、总 N 和有效 P 显著低于火灾前的值，养分浓度现在高于初始水平，但没有统计学意义。因此，土壤系统在火灾九年后仍远未恢复。
