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Article

Growth Response of Aspen and Alder to Fresh and Stockpiled Reclamation Soils

1
Natural Resources Canada, Canadian Forest Service, Edmonton, AB T6H 3S5, Canada
2
Department of Renewable Resources, University of Alberta, Edmonton, AB T6G 2E3, Canada
*
Author to whom correspondence should be addressed.
Forests 2018, 9(12), 731; https://doi.org/10.3390/f9120731
Received: 24 September 2018 / Revised: 3 November 2018 / Accepted: 15 November 2018 / Published: 22 November 2018
(This article belongs to the Section Forest Ecology and Management)
Soil stockpiling is a common reclamation practice used in oil sands mining in the boreal forest region of Canada to conserve soil resources; but stockpiling may have detrimental effects on soil quality and plant growth. We examined growth response of trembling aspen (Populus tremuloides Michx.), a fast-growing early successional tree, and green alder (Alnus viridis (Chaix) DC. ssp crispa (Ait.) Turrill), a nitrogen-fixing shrub, to stockpiling and fertilization treatments on two reclamation soils (forest floor mineral mix (FFMM) and peat mineral mix (PMM)). Aspen and alder seeds were planted and their growth monitored for four months in the greenhouse. We found that unfertilized stockpiled FFMM supported significantly higher aspen and alder aboveground biomass than the other fresh and stockpiled soils. Phosphorus and potassium supply rates were highest in stockpiled FFMM and were positively correlated with aboveground plant biomass. There was no significant difference in aspen and alder aboveground biomasses between unfertilized fresh FFMM and PMM soils. Aspen grown in combination with nitrogen-fixing alder did not experience competition or facilitation except on fresh PMM, where aspen height declined. Fertilization increased both aspen and alder growth and eliminated differences in growth between soil types and stockpiling treatments. Our study showed that individual soil properties are more important for revegetation purposes than type of soil or stockpiling treatment. View Full-Text
Keywords: fertilization; forest floor mineral mix; green alder; oil sands; peat mineral mix; reclamation; stockpiling; trembling aspen fertilization; forest floor mineral mix; green alder; oil sands; peat mineral mix; reclamation; stockpiling; trembling aspen
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MDPI and ACS Style

Omari, K.; Gupta, S.D.; Pinno, B.D. Growth Response of Aspen and Alder to Fresh and Stockpiled Reclamation Soils. Forests 2018, 9, 731. https://doi.org/10.3390/f9120731

AMA Style

Omari K, Gupta SD, Pinno BD. Growth Response of Aspen and Alder to Fresh and Stockpiled Reclamation Soils. Forests. 2018; 9(12):731. https://doi.org/10.3390/f9120731

Chicago/Turabian Style

Omari, Kwadwo, Sanatan D. Gupta, and Bradley D. Pinno. 2018. "Growth Response of Aspen and Alder to Fresh and Stockpiled Reclamation Soils" Forests 9, no. 12: 731. https://doi.org/10.3390/f9120731

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