Forest Investment Account

Abstract of FII Project R04-078

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Planted Douglas-fir in the Interior Dry-Belt: improving mycorrhization and root structure for better seedling performance

Author(s): Simard, Suzanne (University of British Columbia)
Subject: Biology, Ecology, Forestry, Silviculture/Forest Management Systems
Series: Forest Investment Account (FIA) - Forest Science Program


We seek funding to identify critical nursery factors that lead to improved mycorrhization and rooting structure of nursery-grown interior Douglas-fir seedlings. Survival and productivity of planted Fdi has historically been low in the Dry and Very Dry IDF subzones, and we hypothesize that lack of mycorrhization and poor root structure of standard container seedlings are important contributing factors to this poor success. We will conduct a series of growth-chamber experiments testing different levels, in isolation and combination, of three factors important in growing media: nutrients (nitrogen, phosphorus), water, and aeration. In a separate experiment, standard and 'value-added' experimental seedlings will be inoculated using commercial fungi to test for enhanced mycorrhization. Test seedlings will be out-planted in a preliminary field trial on one site in late summer 2003, and in a full-outplanting trial across nine sites in the Very Dry, Dry and Moist IDF subzones in spring 2004. A journal paper, extension note, presentations, and workshops will be produced.

For further information, please contact Suzanne Simard, University of British Columbia (

Updated September 08, 2005 

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