Emission of gaseous nitrogen oxides from an extensively managed grassland in Ne Bavaria, Germany. I. Annual budgets of N2O NOx emissions

J. Tilsner, N. Wrage, J. Lauf, G. Gebauer

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43 Citations (Scopus)

Abstract

In a one-year field study (June 1998 to April 1999), we quantified N2O and NOx emissions from an extensively managed grassland in NE Bavaria (Germany) in unfertilized controls and after application of slurry or mineral N (calcium ammonium nitrate), respectively. Emissions were measured every 2–4 weeks, with additional daily measurements for 10 days after each fertilizer application. The closed chamber method was used for N2O and the open chamber method for NOx measurements. Fertilizer applications resulted in significantly increased N2O emission rates in comparison to the low annual mean of the control plots (1.4 mol m–2 h–1). Episodical emission peaks during the summer were attributed to high microbial activity after rainfall. Mineral N fertilization resulted in the highest emission rates. Cumulative annual N2O emissions were 11.2 kg N ha–1 a–1 for the mineral N, 8.8 kg N ha–1 a–1 for the slurry and 3.4 kg N ha–1 a–1 for the control plots. This represents 10.5% (mineral N) and 7.2% (slurry) of the applied nitrogen. The fertilizer-induced N2O emission factors on this extensively managed grassland are high in comparison to emission factors on intensively managed grassland and substantially higher than the 1.5% estimate used by the global emission inventory. NOx emissions increased after the first fertilizer application in summer, but not after the two following fertilizations in fall and spring. Differences between treatments were not significant. Annual NOx emissions were 1.9 kg N ha–1 a–1 for both, mineral N and slurry plots and 1.5 kg N ha–1 a–1 for the controls, representing 0.5% of the N applied with each fertilizer. The ratio of emitted NOx to N2O was 1:4.7 for both fertilized treatments (based on N-atoms)
Original languageEnglish
Pages (from-to)229-247
JournalBiogeochemistry
Volume63
Issue number3
DOIs
Publication statusPublished - 2003

Fingerprint

Nitrogen Oxides
Fertilizers
nitrogen oxides
Minerals
grassland
slurry
fertilizer application
mineral
fertilizer
Rain
Nitrogen
budget
emission inventory
summer
ammonium nitrate
Atoms
microbial activity
calcium
rainfall
nitrogen

Keywords

  • fertilizer application
  • nitric-oxide
  • soil
  • fluxes
  • denitrification
  • netherlands
  • nitrate
  • n-15
  • nitrification
  • inventory

Cite this

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title = "Emission of gaseous nitrogen oxides from an extensively managed grassland in Ne Bavaria, Germany. I. Annual budgets of N2O NOx emissions",
abstract = "In a one-year field study (June 1998 to April 1999), we quantified N2O and NOx emissions from an extensively managed grassland in NE Bavaria (Germany) in unfertilized controls and after application of slurry or mineral N (calcium ammonium nitrate), respectively. Emissions were measured every 2–4 weeks, with additional daily measurements for 10 days after each fertilizer application. The closed chamber method was used for N2O and the open chamber method for NOx measurements. Fertilizer applications resulted in significantly increased N2O emission rates in comparison to the low annual mean of the control plots (1.4 mol m–2 h–1). Episodical emission peaks during the summer were attributed to high microbial activity after rainfall. Mineral N fertilization resulted in the highest emission rates. Cumulative annual N2O emissions were 11.2 kg N ha–1 a–1 for the mineral N, 8.8 kg N ha–1 a–1 for the slurry and 3.4 kg N ha–1 a–1 for the control plots. This represents 10.5{\%} (mineral N) and 7.2{\%} (slurry) of the applied nitrogen. The fertilizer-induced N2O emission factors on this extensively managed grassland are high in comparison to emission factors on intensively managed grassland and substantially higher than the 1.5{\%} estimate used by the global emission inventory. NOx emissions increased after the first fertilizer application in summer, but not after the two following fertilizations in fall and spring. Differences between treatments were not significant. Annual NOx emissions were 1.9 kg N ha–1 a–1 for both, mineral N and slurry plots and 1.5 kg N ha–1 a–1 for the controls, representing 0.5{\%} of the N applied with each fertilizer. The ratio of emitted NOx to N2O was 1:4.7 for both fertilized treatments (based on N-atoms)",
keywords = "fertilizer application, nitric-oxide, soil, fluxes, denitrification, netherlands, nitrate, n-15, nitrification, inventory",
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Emission of gaseous nitrogen oxides from an extensively managed grassland in Ne Bavaria, Germany. I. Annual budgets of N2O NOx emissions. / Tilsner, J.; Wrage, N.; Lauf, J.; Gebauer, G.

In: Biogeochemistry, Vol. 63, No. 3, 2003, p. 229-247.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Emission of gaseous nitrogen oxides from an extensively managed grassland in Ne Bavaria, Germany. I. Annual budgets of N2O NOx emissions

AU - Tilsner, J.

AU - Wrage, N.

AU - Lauf, J.

AU - Gebauer, G.

PY - 2003

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AB - In a one-year field study (June 1998 to April 1999), we quantified N2O and NOx emissions from an extensively managed grassland in NE Bavaria (Germany) in unfertilized controls and after application of slurry or mineral N (calcium ammonium nitrate), respectively. Emissions were measured every 2–4 weeks, with additional daily measurements for 10 days after each fertilizer application. The closed chamber method was used for N2O and the open chamber method for NOx measurements. Fertilizer applications resulted in significantly increased N2O emission rates in comparison to the low annual mean of the control plots (1.4 mol m–2 h–1). Episodical emission peaks during the summer were attributed to high microbial activity after rainfall. Mineral N fertilization resulted in the highest emission rates. Cumulative annual N2O emissions were 11.2 kg N ha–1 a–1 for the mineral N, 8.8 kg N ha–1 a–1 for the slurry and 3.4 kg N ha–1 a–1 for the control plots. This represents 10.5% (mineral N) and 7.2% (slurry) of the applied nitrogen. The fertilizer-induced N2O emission factors on this extensively managed grassland are high in comparison to emission factors on intensively managed grassland and substantially higher than the 1.5% estimate used by the global emission inventory. NOx emissions increased after the first fertilizer application in summer, but not after the two following fertilizations in fall and spring. Differences between treatments were not significant. Annual NOx emissions were 1.9 kg N ha–1 a–1 for both, mineral N and slurry plots and 1.5 kg N ha–1 a–1 for the controls, representing 0.5% of the N applied with each fertilizer. The ratio of emitted NOx to N2O was 1:4.7 for both fertilized treatments (based on N-atoms)

KW - fertilizer application

KW - nitric-oxide

KW - soil

KW - fluxes

KW - denitrification

KW - netherlands

KW - nitrate

KW - n-15

KW - nitrification

KW - inventory

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DO - 10.1023/A:1023365432388

M3 - Article

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EP - 247

JO - Biogeochemistry

JF - Biogeochemistry

SN - 0168-2563

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ER -