EXECUTIVE SUMMARY Frozen stored interior Douglas-fir and lodgepole pine spring plant PSB 412A Styroblock-container seedlings were planted May 1, 2003 near Little Fort, British Columbia, in the moist warm Interior Douglas-fir biogeoclimatic subzone (IDFmw2). Seedlings were planted into the cutblock -as is-, or after a stump removal site preparation treatment. On both of the planting areas, seedlings were planted as controls, or fertilized by placing a package of slow release fertilizer (tea bag) in the soil near the seedling at planting. The Douglas-fir was also fertilized at the time of lift (FAL) by injecting controlled release fertilizer prills into the seedling rootplug, prior to frozen storage. After two growing seasons (i.e. fall 2004), there were no statistically significant (p=0.05) differences in height, diameter, volume or 2004 height increment between any of the various species-fertilizer-site preparation treatments. However, there was a trend of increasing diameter and volume growth in the tea bag fertilized pine, especially on the stumping site preparation ground. Considering the lack of growth response to tea bag fertilizer in the Douglas-fir, it is difficult judge the effectiveness of FAL as a fertilizer delivery method, although it did not cause greater mortality. Overall survival was relatively high, although 3-5% lower on the tea bag fertilized pine treatments. The stumping site preparation resulted in 10-15% more trees being free of vegetation at the end of the second growing season. Tea bag fertilization resulted in a 10-20% increase in the number of trees threatened by vegetation on the stumping site prepared ground. From the above it appears that up to this point fertilization has not assisted the trees in becoming free growing. As this report is based on results after only two growing seasons, it is too early to reach definitive conclusions as much can change within the next few years. This trial is planned to be measured again after three and five growing seasons.
Forest Investment Account (FIA). 2005. Fertilization at planting and at lift with stumping site preparation on interior Douglas-fir and lodgepole pine - Lemieux Creek: Third growing season. Forest Investment Account (FIA) - Forest Science Program. Forest Investment Account Report. FIA2005MR007
Topic: FLNRORD Research Program
Keywords: Forest, Investment, Account, (FIA)
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