No evidence that chronic nitrogen additions increase photosynthesis in mature sugar maple forests

• Published in: Ecological applications Vol. 21; no. 7; p. 2413
• Main Authors: Talhelm, A F, Pregitzer, K S, Burton, A J
• Format: Journal Article
• Language: English
• Published: United States 01.10.2011
• Subjects: Acer - drug effects; Acer - growth & development; Acer - physiology; Carbon - chemistry; Carbon - metabolism; Carbon Isotopes; Fertilizers - analysis; Michigan; Nitrates - chemistry; Nitrates - pharmacology; Nitrogen - chemistry; Nitrogen - pharmacology; Oxygen - chemistry; Oxygen - metabolism; Oxygen Isotopes; Photosynthesis - drug effects; Plant Leaves - chemistry; Plant Leaves - growth & development; Time Factors; Trees - drug effects; Trees - physiology; Michigan

Atmospheric nitrogen (N) deposition can increase forest growth. Because N deposition commonly increases foliar N concentrations, it is thought that this increase in forest growth is a consequence of enhanced leaf-level photosynthesis. However, tests of this mechanism have been infrequent, and increa...