|Contributions||Whitney, R., Macdonald, G.|
Abstract. We tested the hypothesis that moisture stress affects fine root dynamics during and after the stress. To this end, we investigated the effects of soil moisture on annual and seasonal fine root production and mortality over 4 years in a mature balsam fir (Abies balsamea L. Mill.) stand using a minirhizotron and soil ting and irrigating treatments were imposed for 17 weeks Cited by: Balsam fir, tamarack, and black spruce had the greatest mortality, with sugar maple, white pine, red oak, and yellow birch showing negligible mortality. Percent mortality per species was similar using the entire data set (Fig. 1). Aspen was the only hardwood species with more than one dead seed-ling, and there were no signs of root disease on. Mortality increases steadily in Douglas-fir stands to years old but spread is slower in older stands and it takes many decades for the large old trees to be killed by the fungus. This is the most serious disease of older Douglas-fir and true fir. Douglas-fir, mountain hemlock, grand fir and white fir are the most susceptible. The age structure of balsam fir (Abies balsamea (L.) Mill.) regeneration is frequently used to investigate boreal forest dynamics of North ages are usually estimated by counting annual growth rings at the shoot-root interface located above or close to the root system.
Defoliation reduces growth of balsam fir and spruce by up to 90% (MacLean, ), and has long-term effects on rate of stand break-up as well as creating conditions more susceptible to blow down (Morin, ). Precommercial thinning is often used to control stand density in naturally regenerated balsam fir (Abies balsamea (L.) Mill.) stand density control could have beneficial effects on longer term stand stability through a modification of stem shape and root development. All balsam firs are susceptible to root rot, but the National Forest Service website warns that very dry sites increase the chances of this occurring greatly. Considerations The fact that many species of birds and small mammals like voles, mice and chipmunks use a balsam fir for cover and devour its seeds makes this species a good choice to. Phytophthora root rot, balsam twig aphid, balsam woolly adelgid, eriophyid bud, mites, spider mites, freeze injury Southern Yellow Pines regeneration weevils, bark beetles, Nantucket pine tip moth, pine webworm, annosum root rot, stem rusts, pitch canker, Atropellis canker and Diplodia blight, needle cast, sawflies, eastern pine looper, pine.
Infection in and was found to have a cumulative effect on radial growth in these years, together with a delayed effect detectable in Root rot of spruce and balsam fir in. One attempt to air-layer balsam fir was unsuccessful (1). Balsam fir Christmas trees are stump cultured from lateral branches or adventitious shoots. Sapling and Pole Stages to Maturity. Growth and Yield-Balsam fir at maturity is small to medium size, depending on location and growing conditions. In general, heights range from 12 to 18 m (40 to. Highlights Age at mortality and growth loss were quantified in upland black spruce trees infected with Armillaria root disease. In all stands, mortality of infected trees occurred at approximately 90 years of age. Infected black spruce trees experienced significant basal area and volume growth loss 5–15 years prior to mortality. The true date of tree mortality derived at m and below was. When to Plant Balsam Fir. Plant balled, burlaped or bare root balsam fir trees in fall or spring. Fall is usually the best time to plant. Rehydrate bare root trees by soaking them in a bucket of water for several hours before planting. You can plant container-grown plants any time of year. Avoid planting during periods of drought or extreme heat.