Modelling spatial and inter-annual variations of nitrous oxide emissions from UK cropland and grasslands using DailyDayCent

A - Papers appearing in refereed journals

Fitton, N., Datta, A., Cloy, J. M., Rees, R. M., Topp, C. F. E., Bell, M. J., Cardenas, L. M., Williams, J., Smith, K., Thorman, R., Watson, C. J., Mcgeough, K. L., Kuhnert, M., Hastings, A., Anthony, S., Chadwick, D. and Smith, P. 2017. Modelling spatial and inter-annual variations of nitrous oxide emissions from UK cropland and grasslands using DailyDayCent. Agriculture, Ecosystems & Environment. 250 (Supplement C), pp. 1-11.

AuthorsFitton, N., Datta, A., Cloy, J. M., Rees, R. M., Topp, C. F. E., Bell, M. J., Cardenas, L. M., Williams, J., Smith, K., Thorman, R., Watson, C. J., Mcgeough, K. L., Kuhnert, M., Hastings, A., Anthony, S., Chadwick, D. and Smith, P.
Abstract

Agricultural soils are the primary source of nitrous oxide emissions due to management practices including fertiliser application. While fertiliser rates are one of the main drivers of nitrous oxide emissions, emissions are also dependent on other variables such as climate and soil properties. To understand the spatial and inter-annual variations in emission rate, simulations of N2O emissions were made from 2000 to 2010 for UK grass and croplands. In addition, the sensitivity of these emissions to soil and climate inputs was also tested. Emissions of between 0.3 to 3.5 kg N ha−1 yr−1 and 0.7–7 kg N ha−1 yr−1 were simulated across UK croplands and grasslands, respectively. While inter-annual variations can be attributed to climate influences, the primary driver of spatial variations in emissions was soil clay content. However, when the sensitivity of nitrous oxide emissions to soil clay content alone was tested, it was not always the best predictor of emissions, when soil texture is altered outside of the normal range used as inputs to the model from different databases.

KeywordsNitrous oxide emissions; DailyDayCent; Sensitivity analysis; Monte Carlo simulations; Spatial analysis
Year of Publication2017
JournalAgriculture, Ecosystems & Environment
Journal citation250 (Supplement C), pp. 1-11
Digital Object Identifier (DOI)doi:10.1016/j.agee.2017.08.032
Open accessPublished as non-open access
FunderDepartment of Environment, Food and Rural Affairs
Biotechnology and Biological Sciences Research Council
Department of Agriculture, Environment and Rural Affairs for Northern Ireland
Scottish Government
Welsh Assembly Government
Funder project or codeS2N - Soil to Nutrition - Work package 2 (WP2) - Adaptive management systems for improved efficiency and nutritional quality
GHG (Greenhouse Gas) Platform - Nitrous Oxide Emission Factors
Output statusPublished
Publication dates
Online07 Sep 2017
Publication process dates
Accepted29 Aug 2017
Copyright licensePublisher copyright
PublisherElsevier
Elsevier Science Bv
Grant IDBB/N013484/1
NE/M016900/1
NE/K002589/1
AC0116
AC0114
ISSN0167-8809

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