Nitrous oxide emissions from application of urea on New Zealand pasture
Open accessAbstract
The use of nitrogen (N) fertiliser has been identified as a possible important source of nitrous oxide (N 2 O) from pastoral soils, and urea is the main form of N fertiliser used in New Zealand. The aim of this study was to examine the effects of urea application on N 2 O emissions from pastoral soil. A closed soil chamber technique was used to measure the N 2 O emissions from a pasture which received either 0 (control) or 50 kg N ha –1 (as urea) per application during different seasons between 2003 and 2005. Overall, urea fertiliser application generally increased N 2 O fluxes above control levels for up to 30 days, but the duration for which N 2 O levels were elevated depended on the season. These increases in the N 2 O fluxes were largely caused by a combination of changes in the soil mineral N level due to urea application, and moisture content of soil in different seasons. Nitrous oxide emissions were higher during the winter and spring measurement periods when the soil water‐filled pore space (WFPS) was mostly above field capacity, and the emissions were lower during the summer and autumn measurement periods when the soil WFPS was below field capacity. The estimated N 2 O emission factors for urea ranged between 0 and 1.56% of the urea‐N applied, with a calculated average emission factor of 0.56%. The findings of the seasonal measurements suggests that a reduction in the use of N fertilizers under wet winter or wet spring conditions in New Zealand could potentially reduce N 2 O emissions from pastoral soil.
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Increasing urea production may therefore have a negative impact on climate.
“Increasing urea production may therefore have a negative impact on climate 35 .”
From The technological and economic prospects for CO2 utilization and removal (2019) · cites this paper as [35]
The Introduction links nitrous oxide emissions to global warming, and the Abstract reports that applying urea to New Zealand pasture generally increased those emissions. This supports a potential climate impact from increased urea use, but the paper does not assess the impact of increasing urea production itself. (LLM, conf=0.85)
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- Authors
- Luo, J., Ledgard, S. F., & Lindsey, S. B.
- Affiliations
- AgResearch (NZ)
- Venue
- New Zealand Journal of Agricultural Research
- Publisher
- Wiley
- Published
- 2007-03
- Volume
- 50
- Issue
- 1
- Pages
- 1-11
- ISSN
- 0028-8233 (ISSN-L)
- 1175-8775
- OpenAlex
- W2021935383
- Semantic Scholar
- d0f5b226a2c122351489ae714ff3e9099214645b
- Cited by
- 53
- References
- 45
- Citations by year
- 2026: 1 · 2025: 2 · 2024: 1 · 2023: 4 · 2022: 5 · 2021: 1 · 2020: 4 · 2019: 3 · 2017: 1 · 2016: 3 · 2015: 4 · 2014: 1 · 2013: 5 · 2012: 2
- FWCI
- 8.20
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- New Zealand Journal of Agricultural Research (publishedVersion)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
- Physical Sciences › Environmental Science › Environmental Chemistry › Soil and Water Nutrient Dynamics
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil erosion and sediment transport
- Keywords
- nitrous oxide emissions, urea fertilizer, pasture, seasonal variation, water-filled pore space, soil mineral nitrogen, emission factors, nitrogen fertilization, New Zealand
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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