Distribution of nitrogen-15 tracers applied to the canopy of a mature spruce-hemlock stand, Howland, Maine, USA

  title={Distribution of nitrogen-15 tracers applied to the canopy of a mature spruce-hemlock stand, Howland, Maine, USA},
  author={David Bryan Dail and David Y. Hollinger and Eric A Davidson and Iv{\'a}n Fern{\'a}ndez and Herman C. Sievering and Neal A. Scott and Elizabeth Gaige},
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… CONTINUE READING
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