Journal article

Publication year: 2004

Journal: Global Biogeochemical Cycles

Volume number: 18

Issue number: 1

ISSN: 0886-6236

eISSN: 1944-9224

Open access status: Bronze

DOI Link: https://doi.org/10.1029/2003GB002175

Publisher: Wiley

Abstract: 
[1] Nitrogen (N) fertilized or grazed grasslands in temperate regions of the Northern and Southern Hemisphere are important sources for atmospheric nitrous oxide (N2O). Following synthetic urine applications in a New Zealand grassland ecosystem, and ammonium (NH4+) and nitrate (NO3-) applications to a German grassland ecosystem, approximately 31, 16, and 5%, respectively, of the total emitted N2O (N2Otot) was produced by nitrification (N2Onit) with the rest being produced by denitrification (N2Oden). Analyses of the combined data set showed that 75% of all N2O emissions occurred above 60% water filled porosity (WFPS) and that more than 80% of all N2O emissions occurred at soil temperatures between 10degrees and 15degreesC. N2Oden emissions were associated with a WFPS value at around 80% at relatively low NO3- concentrations, while N2Onit emissions only occurred at high NH4+ levels shortly after N application at soil temperatures around 10 degreesC. To increase the accuracy of predictions with simple mathematical models, such as the "hole-in-the-pipe-model,'' long-term validation data sets are needed where driving variables are related to measured N2Onit and N2Oden data.

Harvard Citation style: Müller, C. and Sherlock, R. (2004) Nitrous oxide emissions from temperate grassland ecosystems in the Northern and Southern Hemispheres, Global Biogeochemical Cycles, 18(1), Article GB1045. https://doi.org/10.1029/2003GB002175

APA Citation style: Müller, C., & Sherlock, R. (2004). Nitrous oxide emissions from temperate grassland ecosystems in the Northern and Southern Hemispheres. Global Biogeochemical Cycles. 18(1), Article GB1045. https://doi.org/10.1029/2003GB002175