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    Author(s): David Bryan Dail; David Y. Hollinger; Eric A. Davidson; Ivan Fernandez; Herman C. Sievering; Neal A. Scott; Elizabeth Gaige
    Date: 2009
    Source: Oecologia. 160: 589-599.
    Publication Series: Scientific Journal (JRNL)
    Station: Northern Research Station
    PDF: View PDF  (258.41 KB)


    In N-limited ecosystems, fertilization by N deposition may enhance plant growth and thus impact C sequestration. In many N deposition-C sequestration experiments, N is added directly to the soil, bypassing canopy processes and potentially favoring N immobilization by the soil. To understand the impact of enhanced N deposition on a low fertility unmanaged forest and better emulate natural N deposition processes, we added 18 kg N ha-1 year-1 as dissolved NH4NO3 directly to the canopy of 21 ha of spruce-hemlock forest.

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    Dail, David Bryan; Hollinger, David Y.; Davidson, Eric A.; Fernandez, Ivan; Sievering, Herman C.; Scott, Neal A.; Gaige, Elizabeth. 2009. Distribution of nitrogen-15 tracers applied to the canopy of a mature spruce-hemlock stand, Howland, Maine, USA. Oecologia. 160: 589-599.


    nitrogen-15, nitrate, ammonium, nitrogen deposition, carbon sequestration, Forest elemental cycling

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