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Modelling uncertainty for nitrate leaching and nitrous oxide emissions based on a Swedish field experiment with organic crop rotation

Nylinder, Josefine; Stenberg, Maria; Jansson, Per-Erik; Klemedtsson, Åsa Kasimir; Weslien, Per and Klemedtsson, Leif (2011) In Agriculture, Ecosystems & Environment 141(02-jan). p.167-183
Abstract
High uncertainties are common in detailed quantification of the N budget of agricultural cropping systems. The process-based CoupModel, integrated with the parameter calibration method known as Generalized likelihood uncertainty estimation (GLUE), was used here to define parameter values and estimate an N budget based on experimental data from an organic farming experiment in south-west Sweden. Data on nitrate (NO(3)(-)) leaching and nitrous oxide (N(2)O) emissions were used as a basis for quantifying N budget pools. A complete N budget with uncertainties associated with the different components of the N cycle compartments for two different fields (B2 and B4) is presented. Simulated N(2)O emissions contributed 1-2% of total N output, which... (More)
High uncertainties are common in detailed quantification of the N budget of agricultural cropping systems. The process-based CoupModel, integrated with the parameter calibration method known as Generalized likelihood uncertainty estimation (GLUE), was used here to define parameter values and estimate an N budget based on experimental data from an organic farming experiment in south-west Sweden. Data on nitrate (NO(3)(-)) leaching and nitrous oxide (N(2)O) emissions were used as a basis for quantifying N budget pools. A complete N budget with uncertainties associated with the different components of the N cycle compartments for two different fields (B2 and B4) is presented. Simulated N(2)O emissions contributed 1-2% of total N output, which corresponded to 7% and 8.7% of total N leaching for B2 and B4, respectively. Measured N(2)O emissions contributed 3.5% and 10.3% of total N leaching from B2 and B4, respectively. Simulated N inputs (deposition, plant N fixation and fertilisation) and outputs (emissions, leaching and harvest) showed a relatively small range of uncertainty, while the differences in N storage in the soil exhibited a larger range of uncertainty. One-fifth of the GLUE-calibrated parameters had a significant impact on simulated NO(3)(-) leaching and/or N(2)O emissions data. Emissions of N(2)O were strongly associated with the nitrification process. The high degree of equifinality indicated that a simpler model could be calibrated to the same field data. (C) 2011 Elsevier B.V. All rights reserved. (Less)
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author
publishing date
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Contribution to journal
publication status
published
subject
keywords
Agriculture, N budget, N(2) fixation, soil, CoupModel, Calibration, Uncertainty estimations
in
Agriculture, Ecosystems & Environment
volume
141
issue
02-jan
pages
167 - 183
publisher
Elsevier
external identifiers
  • scopus:79954632041
ISSN
1873-2305
DOI
10.1016/j.agee.2011.02.027
project
BECC
language
English
LU publication?
no
id
be626020-a270-4f25-93df-ba021e70a651 (old id 4448655)
date added to LUP
2014-05-23 12:11:24
date last changed
2017-04-02 03:54:56
@article{be626020-a270-4f25-93df-ba021e70a651,
  abstract     = {High uncertainties are common in detailed quantification of the N budget of agricultural cropping systems. The process-based CoupModel, integrated with the parameter calibration method known as Generalized likelihood uncertainty estimation (GLUE), was used here to define parameter values and estimate an N budget based on experimental data from an organic farming experiment in south-west Sweden. Data on nitrate (NO(3)(-)) leaching and nitrous oxide (N(2)O) emissions were used as a basis for quantifying N budget pools. A complete N budget with uncertainties associated with the different components of the N cycle compartments for two different fields (B2 and B4) is presented. Simulated N(2)O emissions contributed 1-2% of total N output, which corresponded to 7% and 8.7% of total N leaching for B2 and B4, respectively. Measured N(2)O emissions contributed 3.5% and 10.3% of total N leaching from B2 and B4, respectively. Simulated N inputs (deposition, plant N fixation and fertilisation) and outputs (emissions, leaching and harvest) showed a relatively small range of uncertainty, while the differences in N storage in the soil exhibited a larger range of uncertainty. One-fifth of the GLUE-calibrated parameters had a significant impact on simulated NO(3)(-) leaching and/or N(2)O emissions data. Emissions of N(2)O were strongly associated with the nitrification process. The high degree of equifinality indicated that a simpler model could be calibrated to the same field data. (C) 2011 Elsevier B.V. All rights reserved.},
  author       = {Nylinder, Josefine and Stenberg, Maria and Jansson, Per-Erik and Klemedtsson, Åsa Kasimir and Weslien, Per and Klemedtsson, Leif},
  issn         = {1873-2305},
  keyword      = {Agriculture,N budget,N(2) fixation,soil,CoupModel,Calibration,Uncertainty estimations},
  language     = {eng},
  number       = {02-jan},
  pages        = {167--183},
  publisher    = {Elsevier},
  series       = {Agriculture, Ecosystems & Environment},
  title        = {Modelling uncertainty for nitrate leaching and nitrous oxide emissions based on a Swedish field experiment with organic crop rotation},
  url          = {http://dx.doi.org/10.1016/j.agee.2011.02.027},
  volume       = {141},
  year         = {2011},
}