Effects of forest floor planting and stock type on growth and root emergence of Pinus contorta seedlings in a cold northern cutblock |
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| Authors: | D Bruce Campbell Steven Kiiskila Leanne J Philip Janusz J Zwiazek Melanie D Jones |
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| Institution: | (1) Biology Department, Okanagan University College, 3333 University Way, Kelowna, BC, V1V 1V7, Canada;(2) Department of Renewable Resources, University of Alberta, 4-42 Earth Science Building, Edmonton, AB, T6G 2E3, Canada;(3) New Forest Treeworks, 8640 Honeymoon Dr. S., Prince George, BC, V2K 5J8, Canada;(4) Department of Forest Sciences, University of British Columbia, 2424 Main Mall, Vancouver, BC, V6T 1Z4, Canada |
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| Abstract: | A two-year field trial was conducted to determine the growth response, and root emergence pattern of interior lodgepole pine
(Pinus contorta Dougl. var. latifolia Engelm.) seedlings in response to container type and forest floor removal. Seedlings were grown in StyroblocksTM, CopperblocksTM, or AirBlocksTM, and were planted directly into the undisturbed forest floor or into manually prepared planting spots where the forest floor
had been scraped away to expose the mineral soil. Seedlings planted into scalped planting spots exhibited marginally but significantly
(7%) greater above-ground growth rates (seedling stem volume); whereas seedlings planted into the forest floor produced significantly
more (11%) new roots. There were no differences in above- or below-ground biomass. Seedlings grown in CopperblockTM containers produced a higher proportion of roots near the top of the plug when tested at lifting, however this pattern was
not observed in the field. Given that scalping is more costly than forest floor planting, and that the increased shoot growth
was relatively small, we recommend that forest floor planting be considered as an alternative to manual spot scalping for
sites, such as the site tested here: those with cold, but well-drained soils and where competition from other plants is not
a serious problem. |
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| Keywords: | Container type Forest floor planting Lodgepole pine Scalping |
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