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Soil nitrous oxide and nitric oxide emissions as indicators of elevated atmospheric N deposition rates in seminatural ecosystems

Skiba, U.; Sheppard, L.; Pitcairn, C. E. R.; Leith, I.; Crossley, A.; van Dijk, S.; Kennedy, V. J.; Fowler, D.. 1998 Soil nitrous oxide and nitric oxide emissions as indicators of elevated atmospheric N deposition rates in seminatural ecosystems. Environmental Pollution, 102 (S1). 457-461. 10.1016/S0269-7491(98)80069-9

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Abstract/Summary

Elevated N deposition caused by ammonia emissions from poultry and pig farms, and supplemented N concentrations in acid mist in field and chamber experiments increased soil available NH4+ and NO3− concentrations and emissions of N2O and NO. In a ‘pristine’ soil, not previously exposed to high N deposition rates, an initial threshold of 40 kg N ha−1 year −1 was required to increase N2O emissions. For all data described here on average 0.76% (range 0.2 to 15%) of the elevated N deposited was emitted as N2O. For soils exposed to long-term and large N deposition rates N2O losses>3% of the N deposition rate were calculated. This suggests that N2O losses of more than 3% of the N input can be indicative of soil ecosystems where the N input exceeds its demand. For NO a more limited data set showed losses ranging from 1.3 to 20% of the elevated N input. It was calculated that NH3 emissions from all intensive pig and poultry farms in Great Britain accounted for 18 t N2O---N year−1 and that poultry farms accounted for less than 3 t NO---N year−1.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1016/S0269-7491(98)80069-9
Programmes: CEH Programmes pre-2009 publications > Biogeochemistry
CEH Sections: _ Biogeochemistry & Ecosystem Function
ISSN: 0269-7491
Additional Keywords: Nitrous oxide, nitric oxide, soils, N deposition
NORA Subject Terms: Agriculture and Soil Science
Ecology and Environment
Atmospheric Sciences
Date made live: 11 Sep 2008 15:43
URI: http://nora.nerc.ac.uk/id/eprint/3825

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