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Notes: Germination and Early Seedling Growth of Four Conifers on Acidic and Alkaline Substrates

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Direct effects of buffered solutions (pH 2.2, 3.0, and 9.0) on seed germination and early seedling growth were studied in the laboratory. Germination of lodgepole pine at the low pHs was higher than that at the reference (distilled water, pH 6.5). Germination of white spruce and jack pine at low pHs was equal to germination at the reference, while that of black spruce was significantly lower. Extreme alkaline conditions (pH 9.0) reduced germination in all species below that for the reference pH. Seedling growth of all species was ignificantly less at high and low pHs than in distilled water. Lodgepole pine grew best of all species at pH 9.0; jack pine showed the most growth at pH 3.0. Such tests have relevance for species selection for revegetation of mine spoils, tailings, and other sites with extreme pH. Forest Sci. 25:358-360.

Keywords: Picea glauca; Picea mariana; Pinus banksiana; Pinus contorta; black spruce; jack pine; lodgepole pine; mine wastes; pH; revegetation; white spruce

Document Type: Miscellaneous

Affiliations: Professor, Department of Plant Ecology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 0W0

Publication date: June 1, 1979

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