Land reclamation in the Athabasca oil sands region requires construction of entire soil profiles from materials salvaged during mining. Although much attention has been paid to the limited supply of suitable topsoil materials and their impact on ecosystem recovery, suitable clean subsoil materials are also in limited supply, and their efficient and effective use is an important consideration for land managers in the region. Using data from an oil sands reclamation site in northern Alberta, Canada, we compared soil and foliar nutrients to a wildfire-impacted reference ecosystem with a similarity index. Specifically, we evaluated the similarity of forest floor-mineral mix (FFM) and peat-mineral mix (PM) as topsoil, as well as the effect of different depths of salvaged B and C horizon subsoil with PM on top. All reclamation treatments were planted with jack pine (Pinus banksiana Lamb.) and trembling aspen (Populus tremuloides Michx.), which were used to examine foliar nutrient concentrations. Individual macronutrient concentrations were different among treatments in total soil nutrients, but differences decreased in soil bioavailable nutrients and disappeared altogether in foliar nutrients. The similarity index revealed that distinct differences existed between treatments, with FFM being the most similar to the wildfire site. It also revealed a potential deficiency in foliar and soil bioavailable Mn on PM, and that increased water content of deeper subsoils had little to no effect. With use of this nutrient profile similarity index, reclamation practitioners may be able to determine if different soil prescriptions lead to higher levels of similarity to natural ecosystems more quickly.

中文翻译：

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使用营养成分指数评估阿尔伯塔省北部阿萨巴斯卡油砂地区的复垦策略

阿萨巴斯卡油砂地区的土地复垦需要使用采矿期间回收的材料构建整个土壤剖面。尽管合适的表土材料供应有限及其对生态系统恢复的影响引起了很多关注，但合适的清洁底土材料供应也有限，其高效和有效利用是该地区土地管理者的重要考虑因素。我们使用来自加拿大阿尔伯塔省北部油砂填海区的数据，将土壤和叶面养分与受野火影响的参考生态系统进行了比较，并具有相似指数。具体来说，我们评估了森林地面矿物混合物 (FFM) 和泥炭矿物混合物 (PM) 作为表土的相似性，以及不同深度的回收的 B 和 C 地平线底土与 PM 在顶部的影响。所有的开垦处理都种植了杰克松 (Pinus bankiana Lamb.) 和颤杨 (Populus tremuloides Michx.)，用于检查叶面养分浓度。土壤总养分各处理间宏量养分浓度存在差异，但土壤生物有效养分差异减小，叶面养分差异完全消失。相似性指数显示处理之间存在明显差异，FFM与野火现场最相似。它还揭示了 PM 中叶面和土壤生物可利用 Mn 的潜在缺乏，并且较深底土的含水量增加几乎没有影响。使用这种营养成分相似性指数，