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.2010.06.002

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Abstract/Summary

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).

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1016/j.envpol.2010.06.002
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 - 2012 > Biogeochemistry
UKCEH and CEH Sections/Science Areas:	Billett (to November 2013)
ISSN:	0269-7491
NORA Subject Terms:	Ecology and Environment
Date made live:	09 Aug 2010 13:47 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/10431

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