Seasonal nitrogen and carbon concentrations in white,brown and woody fine roots of sugar maple (Acer saccharum Marsh) |
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Authors: | Daniel Goldfarb Ron Hendrick Kurt Pregitzer |
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Institution: | (1) Department of Forestry, Michigan State University, 48824 East Lansing, MI, USA |
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Abstract: | Small diameter (<1.0-mm) Acer saccharum Marsh roots were separated into white, brown and woody development state classes and analyzed for total N and C concentrations in April, July and October of 1988. White roots had greater concentrations of N and C than either brown or woody roots at each sampling date, and the N concentration of brown roots was consistently greater than that of woody roots. There were no temporal changes in N concentrations in any of the roots. C was slightly elevated in mid-summer in all three classes of roots. The data suggest the possible existence of an N translocation mechanism in ageing and developing fine roots. More research should be undertaken to establish the mechanisms of N loss in developing fine roots. |
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Keywords: | Acer saccharum carbon concentration fine roots nitrogen concentration translocation |
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