Disaggregated N2O emission factors in China based on cropping parameters create a robust approach to the IPCC Tier 2 methodology

A Shepherd, X Yan, D Nayak, J Newbold, D Moran, MS Dhanoa, K Goulding, P Smith, LM Cardenas

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12 Citations (Scopus)

Abstract

China accounts for a third of global nitrogen fertilizer consumption. Under an International Panel on Climate Change (IPCC) Tier 2 assessment, emission factors (EFs) are developed for the major crop types using country-specific data. IPCC advises a separate calculation for the direct nitrous oxide (N2O) emissions of rice cultivation from that of cropland and the consideration of the water regime used for irrigation. In this paper we combine these requirements in two independent analyses, using different data quality acceptance thresholds, to determine the influential parameters on emissions with which to disaggregate and create N2O EFs. Across China, the N2O EF for lowland horticulture was slightly higher (between 0.74% and 1.26% of fertilizer applied) than that for upland crops (values ranging between 0.40% and 1.54%), and significantly higher than for rice (values ranging between 0.29% and 0.66% on temporarily drained soils, and between 0.15% and 0.37% on un-drained soils). Higher EFs for rice were associated with longer periods of drained soil and the use of compound fertilizer; lower emissions were associated with the use of urea or acid soils. Higher EFs for upland crops were associated with clay soil, compound fertilizer or maize crops; lower EFs were associated with sandy soil and the use of urea. Variation in emissions for lowland vegetable crops was closely associated with crop type. The two independent analyses in this study produced consistent disaggregated N2O EFs for rice and mixed crops, showing that the use of influential cropping parameters can produce robust EFs for China. © 2015 Published by Elsevier Ltd.
Original languageEnglish
Pages (from-to)272 - 281
Number of pages10
JournalAtmospheric Environment
Volume122
DOIs
Publication statusFirst published - 2015

Fingerprint

cropping practice
methodology
crop
rice
fertilizer
urea
horticulture
soil
parameter
emission factor
acid soil
nitrous oxide
clay soil
sandy soil
vegetable
maize
nitrogen

Bibliographical note

1023515

Keywords

  • Agriculture
  • China
  • Emission factor
  • Fertilizer
  • Greenhouse gas
  • Nitrous oxide

Cite this

Shepherd, A ; Yan, X ; Nayak, D ; Newbold, J ; Moran, D ; Dhanoa, MS ; Goulding, K ; Smith, P ; Cardenas, LM. / Disaggregated N2O emission factors in China based on cropping parameters create a robust approach to the IPCC Tier 2 methodology. In: Atmospheric Environment. 2015 ; Vol. 122. pp. 272 - 281.
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abstract = "China accounts for a third of global nitrogen fertilizer consumption. Under an International Panel on Climate Change (IPCC) Tier 2 assessment, emission factors (EFs) are developed for the major crop types using country-specific data. IPCC advises a separate calculation for the direct nitrous oxide (N2O) emissions of rice cultivation from that of cropland and the consideration of the water regime used for irrigation. In this paper we combine these requirements in two independent analyses, using different data quality acceptance thresholds, to determine the influential parameters on emissions with which to disaggregate and create N2O EFs. Across China, the N2O EF for lowland horticulture was slightly higher (between 0.74{\%} and 1.26{\%} of fertilizer applied) than that for upland crops (values ranging between 0.40{\%} and 1.54{\%}), and significantly higher than for rice (values ranging between 0.29{\%} and 0.66{\%} on temporarily drained soils, and between 0.15{\%} and 0.37{\%} on un-drained soils). Higher EFs for rice were associated with longer periods of drained soil and the use of compound fertilizer; lower emissions were associated with the use of urea or acid soils. Higher EFs for upland crops were associated with clay soil, compound fertilizer or maize crops; lower EFs were associated with sandy soil and the use of urea. Variation in emissions for lowland vegetable crops was closely associated with crop type. The two independent analyses in this study produced consistent disaggregated N2O EFs for rice and mixed crops, showing that the use of influential cropping parameters can produce robust EFs for China. {\circledC} 2015 Published by Elsevier Ltd.",
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Disaggregated N2O emission factors in China based on cropping parameters create a robust approach to the IPCC Tier 2 methodology. / Shepherd, A; Yan, X; Nayak, D; Newbold, J; Moran, D; Dhanoa, MS; Goulding, K; Smith, P; Cardenas, LM.

In: Atmospheric Environment, Vol. 122, 2015, p. 272 - 281.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Shepherd, A

AU - Yan, X

AU - Nayak, D

AU - Newbold, J

AU - Moran, D

AU - Dhanoa, MS

AU - Goulding, K

AU - Smith, P

AU - Cardenas, LM

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N2 - China accounts for a third of global nitrogen fertilizer consumption. Under an International Panel on Climate Change (IPCC) Tier 2 assessment, emission factors (EFs) are developed for the major crop types using country-specific data. IPCC advises a separate calculation for the direct nitrous oxide (N2O) emissions of rice cultivation from that of cropland and the consideration of the water regime used for irrigation. In this paper we combine these requirements in two independent analyses, using different data quality acceptance thresholds, to determine the influential parameters on emissions with which to disaggregate and create N2O EFs. Across China, the N2O EF for lowland horticulture was slightly higher (between 0.74% and 1.26% of fertilizer applied) than that for upland crops (values ranging between 0.40% and 1.54%), and significantly higher than for rice (values ranging between 0.29% and 0.66% on temporarily drained soils, and between 0.15% and 0.37% on un-drained soils). Higher EFs for rice were associated with longer periods of drained soil and the use of compound fertilizer; lower emissions were associated with the use of urea or acid soils. Higher EFs for upland crops were associated with clay soil, compound fertilizer or maize crops; lower EFs were associated with sandy soil and the use of urea. Variation in emissions for lowland vegetable crops was closely associated with crop type. The two independent analyses in this study produced consistent disaggregated N2O EFs for rice and mixed crops, showing that the use of influential cropping parameters can produce robust EFs for China. © 2015 Published by Elsevier Ltd.

AB - China accounts for a third of global nitrogen fertilizer consumption. Under an International Panel on Climate Change (IPCC) Tier 2 assessment, emission factors (EFs) are developed for the major crop types using country-specific data. IPCC advises a separate calculation for the direct nitrous oxide (N2O) emissions of rice cultivation from that of cropland and the consideration of the water regime used for irrigation. In this paper we combine these requirements in two independent analyses, using different data quality acceptance thresholds, to determine the influential parameters on emissions with which to disaggregate and create N2O EFs. Across China, the N2O EF for lowland horticulture was slightly higher (between 0.74% and 1.26% of fertilizer applied) than that for upland crops (values ranging between 0.40% and 1.54%), and significantly higher than for rice (values ranging between 0.29% and 0.66% on temporarily drained soils, and between 0.15% and 0.37% on un-drained soils). Higher EFs for rice were associated with longer periods of drained soil and the use of compound fertilizer; lower emissions were associated with the use of urea or acid soils. Higher EFs for upland crops were associated with clay soil, compound fertilizer or maize crops; lower EFs were associated with sandy soil and the use of urea. Variation in emissions for lowland vegetable crops was closely associated with crop type. The two independent analyses in this study produced consistent disaggregated N2O EFs for rice and mixed crops, showing that the use of influential cropping parameters can produce robust EFs for China. © 2015 Published by Elsevier Ltd.

KW - Agriculture

KW - China

KW - Emission factor

KW - Fertilizer

KW - Greenhouse gas

KW - Nitrous oxide

U2 - 10.1016/j.atmosenv.2015.09.054

DO - 10.1016/j.atmosenv.2015.09.054

M3 - Article

VL - 122

SP - 272

EP - 281

JO - Atmospheric Environment

JF - Atmospheric Environment

SN - 0004-6981

ER -