Experimental field estimation of organic nitrogen formation in tree canopies
Cape, J.N.; Sheppard, L.J.; Crossley, A.; van Dijk, N.; Tang, Y.S.. 2010 Experimental field estimation of organic nitrogen formation in tree canopies. Environmental Pollution, 158. 2926-2933. 10.1016/j.envpol.2010.06.002Before downloading, please read NORA policies.
N010431PP.pdf - Accepted Version
The content of organic N has been shown in many studies to increase during the passage of rain water through forest canopies. The source of this organic N is unknown, but generally assumed to come from canopy processing of wet or dry-deposited inorganic N. There have been very few experimental studies in the field to address the canopy formation or loss of organic N. We report two studies: a Scots pine canopy exposed to ammonia gas, and a Sitka spruce canopy exposed to ammonium and nitrate as wet deposition. In both cases, organic N deposition in throughfall was increased, but only represented a small fraction (<10%) of the additional inorganic N supplied, suggesting a limited capacity for net organic N production, similar in both conifer canopies under Scottish summertime conditions, of less than 1.6 mmol Nm2 mth1 (equivalent to 3 kg N ha1 y1).
|Programmes:||CEH Programmes pre-2009 publications > Biogeochemistry > BG01 Measuring and modelling trace gas, aerosol and carbon > BG01.1 UK nitrogen and sulphur compounds
CEH Topics & Objectives 2009 onwards > Biogeochemistry
|NORA Subject Terms:||Ecology and Environment|
|Date made live:||09 Aug 2010 13:47|
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