Natural recovery of acidic soils following heavy traffic is assumed to take several decades. The aim of this study was to monitor the recovery of soil penetration resistance (PR) after soil compaction by heavy traffic at two forest sites. The sites, located in northeast France, have soils that differ slightly in pH and silt content. The impact on soil PR following heavy traffic was dependent on the soil water content (WC) at the time of measurement, and, therefore, the entire WC range and corresponding PR values were measured. For the most acidic and silty soil, no difference in PR among treatments was observed when the soils were near saturation; however, the difference in PR values was high when soils were close to wilting point. For the least acidic and silty soil, the impact of heavy traffic on PR could be detected whatever the soil moisture, with the magnitude of the effect dependent on the soil water content and depth considered. Standardized PR values with regard to WC allowed an analysis of the evolution of the effect of heavy traffic with time. Ten years after being subjected to heavy traffic, the PR values in the 0- to 40-cm layer recovered to undisturbed values at the least acidic and silty site, but not WC dynamic. The most acidic and silty soil site did not show any recovery of PR or WC dynamic ten years following traffic, although liming at this site was able to increase the regeneration of PR to undisturbed levels.

中文翻译：

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交通繁忙后的森林土壤渗透阻力：一项为期 10 年的实地研究

假设交通繁忙后酸性土壤的自然恢复需要几十年的时间。本研究的目的是监测两个森林地点因交通繁忙导致土壤压实后土壤渗透阻力 (PR) 的恢复情况。这些地点位于法国东北部，土壤的 pH 值和淤泥含量略有不同。交通繁忙后对土壤 PR 的影响取决于测量时的土壤含水量 (WC)，因此，测量了整个 WC 范围和相应的 PR 值。对于最酸性和粉质土壤，当土壤接近饱和时，处理间的 PR 没有差异；然而，当土壤接近枯萎点时，PR 值的差异很大。对于酸性和粉质含量最低的土壤，无论土壤湿度如何，都可以检测到繁忙交通对 PR 的影响，影响的大小取决于所考虑的土壤含水量和深度。关于 WC 的标准化 PR 值允许分析繁忙交通影响随时间的演变。在经历了繁忙的交通十年后，0 至 40 厘米层的 PR 值在酸性和粉质最少的位置恢复到未受干扰的值，但没有 WC 动态。最酸性和粉质土壤站点在交通十年后没有显示任何 PR 或 WC 动态恢复，尽管该站点的石灰能够将 PR 的再生提高到不受干扰的水平。0 到 40 cm 层的 PR 值在酸性和粉质最少的位置恢复到未受干扰的值，但 WC 动态没有。最酸性和粉质土壤站点在交通十年后没有显示任何 PR 或 WC 动态恢复，尽管该站点的石灰能够将 PR 的再生提高到不受干扰的水平。0 到 40 cm 层的 PR 值在酸性和粉质最少的位置恢复到未受干扰的值，但 WC 动态没有。最酸性和粉质土壤站点在交通十年后没有显示任何 PR 或 WC 动态恢复，尽管该站点的石灰能够将 PR 的再生提高到不受干扰的水平。