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首页> 外文期刊>Journal of forest research >Wildfire burned soil organic horizon contribution to runoff and infiltration in a Pinus pinaster forest soil
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Wildfire burned soil organic horizon contribution to runoff and infiltration in a Pinus pinaster forest soil

机译：野火烧土壤有机地平线对径流和渗透的贡献，并在松果林森林土壤中渗透

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摘要

The immediate effects of a low soil burn severity wildfire on hydrological parameters and soil erosion were evaluated in a Pinus pinaster Ait. stand by means of rainfall simulations (140 mm h(-1)). The unburned forest soil was repellent at the mineral surface (100%) at the same degree as the burned ones. The diameter of soil aggregates and the particle size distribution did not differ between burned and unburned soils. The mean storage capacity of the unburned soil organic layer was 0.94-4.85 mm m(-2) from the litter to the duff layers. The corresponding values for the capillary capacity were from 7.11 mm to 6.72 mm. In the burned plots, these figures were 1.42 mm m(-2) for the mean storage capacity and 5.9 mm for the capillary capacity. The burned plots recorded significantly lower infiltration rates (29 mm h(-1)) and higher runoff (111 mm) and sediment yields (20.8 g m(- 2)) compared to the unburned controls. The characteristics of the soil organic layer significantly affected the infiltration rate and runoff volume. In a subsequent experiment, the remaining organic layer was completely removed and a new rainfall simulation was carried out. In unburned soils decreases in the infiltration rate and increases in the runoff volume were recorded with no significant changes in the sediment yields. In the burned plots, removal of the duff layer only led to a significant increase in soil erosion (20.8-51.4 g m(-2)). The above information could be used to help plan post-fire stabilization actions.
机译：在Pinus Pinaster Ait中评价了低土烧伤严重性野火对水文参数和土壤侵蚀的直接影响。通过降雨模拟（140 mm h（-1））立场。未燃烧的森林土壤在矿物表面（100％）在与烧伤相同的程度上被驱除。土壤聚集体的直径和粒度分布在烧伤和未燃烧的土壤之间没有区别。未燃烧的土壤有机层的平均储存能力从垃圾到Duff层的0.94-4.85mm m（-2）。毛细管容量的相应值为7.11mm至6.72mm。在烧毁的图中，对于平均储存容量为1.42mm m（-2），毛细管容量为5.9mm。与未燃烧的对照相比，烧坏的烧结率明显降低渗透速率（29mm H（-1））和更高的径流（111mm）和沉积物产量（20.8g m（ - 2））。土壤有机层的特性显着影响了渗透率和径流量。在随后的实验中，完全除去剩余的有机层，进行了新的降雨模拟。在未燃烧的土壤中，渗透率下降，记录径流体积的增加，沉积物产量没有显着变化。在烧毁的图中，去除垫层仅导致土壤腐蚀的显着增加（20.8-51.4g m（-2））。上述信息可用于帮助计划火灾后稳定行动。

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