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首页> 外文会议>International Conference on Mine Closure >Response of aspen and white spruce seedlings to fertilisation on a reconstructed oil sands site in Alberta, Canada
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Response of aspen and white spruce seedlings to fertilisation on a reconstructed oil sands site in Alberta, Canada

机译：加拿大艾伯塔省重建油砂场施肥对阿斯彭和白云幼苗对施肥的影响

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Every year, oil sands mining in Alberta, Canada, results in a significant area of degraded land, which needs to be reclaimed. One of the sustainable reclamation strategies for a post-mining site is reforestation. In reconstructed mine sites, establishment of mixedwood boreal tree seedlings like trembling aspen (Populus tremuloides Michx) and white spruce (Picea glauca) along with ground cover is helpful to stabilise soil, minimise erosion and promote native vegetation restoration. Barley (Hordeum vulgare L.) and oats (Avena sativaj are the ground cover species that have been recommended for oil sands reclamation operations, but interactions of planted tree seedlings with ground cover and the growth response to fertilisation are not clearly understood. This study evaluated the effect of different rates of nitrogen (N), phosphorus (P) and potassium (K) fertiliser on the survival and growth of tree seedlings that were planted without and with barley and oats as ground cover. A lower survival rate was recorded for trembling aspen in response to N,P,K fertilisation. Trembling aspen was more sensitive than white spruce to ground cover competition and was negatively affected by barley and oats, especially with added fertiliser. Height, root collar diameter increment and root and shoot biomass yield of trembling aspen were significantly decreased when planted with ground cover, whereas white spruce was not affected. In general, adding fertiliser to these systems appears to be of very little benefit in enhancing the early establishment and growth of tree seedlings.
机译：每年，在加拿大艾伯塔省的石油砂矿，导致大部分退化的土地面积，需要回收。挖掘后现场的可持续填海策略之一是重新造林。在重建的矿山地点，建立诸如颤抖的白杨树（Populus Trowuloides Michx）和白色云杉（Picea glauca）以及地面盖子的混合族北欧树幼苗以及地面盖子有助于稳定土壤，最大限度地减少侵蚀并促进原生植被恢复。大麦（Hordeum Vulgare L.）和燕麦（Avena Sativaj）是推荐用于油砂填海操作的地面覆盖物种，但种植树幼苗与地面覆盖的相互作用和对施肥的生长反应。这项研究评估了不同氮（n），磷（p）和钾肥率对植物幼苗生存和生长的影响，植物的生存和生长，麦克利和燕麦作为地面覆盖。记录较低的生存率进行颤抖Aspen响应N，P，K施肥。颤抖的白杨比白色云杉更敏感，对地面覆盖竞争更加敏感，受到大麦和燕麦的负面影响，特别是加入肥料。高度，根套管直径增量和根部和射击生物量产量种植地面覆盖时颤抖的白杨显着下降，而白色云杉不受影响。一般来说，出现向这些系统添加肥料在提高树木幼苗的早期建立和生长方面具有很少的好处。

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