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Notes: Factors Affecting Nitrogen Concentration of Fine Roots in Forest Communities: Regression Analysis of Literature Data

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Abstract:

Literature data on nitrogen concentration of live fine roots (≤10 mm in diameter) in forest communities were analyzed by multiple linear regression. After appropriate transformations, root diameter, minimum monthly mean temperature, forest origin, and forest type together accounted for 93.2% of variation in N concentration. We suggest the following possible ecological bases: fine-root N concentration (1) was negatively related to root diameter because of increased percent old tissue and structural material with root size, (2) was negatively related to minimum monthly mean temperature because of a combined effect of soil available N, root absorption capacity, and carbon production, and/or because of selection pressure of cold winter on the genetic trait of higher N in fine roots, (3) was higher in plantations than in natural stands because of species and site selections and management history, and (4) was higher in broad-leaved than needle-leaved forests because of different N cycling rates. For. Sci. 37(1):374-382.

Keywords: Root diameter; forest origin; forest type; minimum monthly mean temperature

Document Type: Miscellaneous

Affiliations: Associate Professor, Department of Forest Resources, University of Minnesota, St. Paul, 55108

Publication date: March 1, 1991

More about this publication?
  • 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.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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