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Changes in canopy processes following whole-forest canopy nitrogen fertilization of a mature spruce-hemlock forest


E. Gaige
D.B. Dail
E.A. Davidson
I.J. Fernandez
H. Sievering
A. White
W. Halteman



Publication type:

Scientific Journal (JRNL)

Primary Station(s):

Northern Research Station


Ecosystems. 10: 1133-1147.


Most experimental additions of nitrogen to forest ecosystems apply the N to the forest floor, bypassing important processes taking place in the canopy, including canopy retention of N and/or conversion of N from one form to another. To quantify these processes, we carried out a large-scale experiment and determined the fate of nitrogen applied directly to a mature coniferous forest canopy in central Maine (18-20 kg N ha-1 y-1 as NH4NO3 applied as a mist using a helicopter).


Gaige, E.; Dail, D.B.; Hollinger, D.Y.; Davidson, E.A.; Fernandez, I.J.; Sievering, H.; White, A.; Halteman, W. 2007. Changes in canopy processes nitrogen fertilization of a mature spruce-hemlock forest. Ecosystems. 10: 1133-1147.

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