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Decomposition Rates of Aspen Bole and Branch Litter

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Living trembling aspen (Populus tremuloides Michx.) trees were felled to create woody litter in two dense stands 35 to 45 yr old growing on medium textured soils in northern Minnesota. Bole and branch sections were removed at felling and after 2, 3, 4, and 5 yr and evaluated for 10 attributes: bark cover, current-volume specific gravity (CVSG), concentrations of N, P, K, Ca, Mg, Fe, Zn, and Mn. Decline patterns were nonlinear for bark cover, apparently linear for CVSG, exponential or linear for K, P, Ca, Mg, and nondescript for Fe, Zn, and Mn. Branch N declined for 3 or 4 yr, then increased; bole N did not change markedly. Mean times observed or projected to half the original values of declining variables ranged from 1 yr for K in branches to 14 yr for CVSG in boles. Findings enable tentative estimation of large-litter contribution to nutrient turnover in aspen ecosystem studies. Forest Sci. 29:351-356.
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Keywords: Nutrient; Populus tremuloides; element; specific gravity

Document Type: Journal Article

Affiliations: Chief Insect Ecologist, USDA Forest Service, North Central Forest Experiment Station, 1992 Folwell Avenue, St. Paul, Minnesota 55108 (present address: Department of Entomology, University of Minnesota, St. Paul, MN 55108)

Publication date: 1983-06-01

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    Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
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