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Nitrous oxide emission factors for agricultural soils in Great Britain: the impact of soil water‐filled pore space and other controlling variables by Karen E. Dobbie; Keith A. Smith is a Environmental Science article available to read on EtoBox.

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## Abstract Measurements were made of nitrous oxide (N~2~O) emissions from N‐fertilised ungrazed grassland and arable land at sites widely distributed across Great Britain during 1999–2001. The closed static chamber method was used throughout. Emissions varied widely throughout the year at each site, and between sites. Daily fluxes up to 1200 g N~2~O–N ha^−1^ d^−1^ were recorded. The highest annual flux was 27.6 kg N~2~O–N ha^−1^ at a grassland site in Wales, whereas the lowest, 1.7 kg N~2~O–N ha^−1^, occurred on a soil overlying chalk in southern England. The key factors affecting N~2~O emissions from agricultural soil were soil WFPS, temperature and soil NO~3~^–^–N content. On grassland, rainfall (particularly around the time of N application), with its consequent effect on water‐filled pore space (WFPS), was the main driving factor during the growing season. Annual emission factors (EFs), uncorrected for background emission, varied from 0.4 to 6.5% of the nitrogen (N) applied, covering a similar range for grassland to that found previously for sites restricted to Scotland. Continued monitoring at a grassland reference site near Edinburgh showed that annual EFs vary greatly from

Who reads Nitrous oxide emission factors for agricultural soils in Great Britain: the impact of soil water‐filled pore space and other controlling variables?

Author

Karen E. Dobbie; Keith A. Smith

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley; Research Square (ISSN 1354-1013)

Published

2003

Language

EN

Field

Environmental Science (Physical Sciences)