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| DOI: | 10.2136/sssaj1979.03615995004300040020x |
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| Web URL(s): | https://dl.sciencesocieties.org/publications/sssaj/pdfs/43/4/SS0430040726
Last checked: 11/11/2016
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Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Denmead, O. T.;
Freney, J. R.;
Simpson, J. R. |
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| Author Affiliation: | Senior Principal Research Scientist; Denmead and Freney: CSIRO Division of Environ. Mech.; Simpson: CSIRO Division of Plant Industry, Canberra City, A.C.T., Australia |
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| Title: | Studies of nitrous oxide emission from a grass sward |
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| Source: | Soil Science Society of America Journal. Vol. 43, No. 4, July/August 1979, p. 726-728. |
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| Publishing Information: | Madison, Wisconsin: Soil Science Society of America |
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| # of Pages: | 3 |
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| Related Web URL: | https://dl.sciencesocieties.org/publications/sssaj/abstracts/43/4/SS0430040726
Last checked: 11/10/2016
Access conditions: Item is within a limited-access website
Notes: Abstract only |
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| Keywords: | TIC Keywords: Air movement; Cynodon dactylon; Emissions; Lawn turf; Nitrous oxide; Soil moisture
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| Abstract/Contents: | "The exchange of nitrous oxide (N2O) between soils and the atmosphere is believed to play an important part in controlling stratospheric ozone levels, but so far, very little information is available on rates of emission or absorption of N2O by soils in the field. The paper reports measurements of N2O exchange made over 5 months from winter to summer in an unfertilized, mown, grass sward. Ambient air was drawn continuously in an open flow system through the above-ground portion of a steel cylinder driven into the ground. The enrichment or depletion of N2O in the air stream was measured with an infrared gas analyzer. Exchange rates as small as 1 ng N m-2 sec-1 could be measured. Nitrous oxide was always emitted from the sward, even at very low soil moisture contents. The emission showed a clear diurnal cycle in phase with the temperature of the surface soil; peak emission rates occurred in the afternoon, minima near sunrise. Additions of water as small as 5 mm increased emission rates markedly. Both results suggest that most of the N2O was produced close to the soil surface rather than at depth in the soil profile. Further, the production of N2O was accompanied by a net increase in soil nitrate. Emissions were largest in the spring. With the soil moist to less than field capacity, average daily emissions over periods of several days ranged from 0.6 to 2.5 mg N m-2." |
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| Language: | English |
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| References: | 19 |
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| Note: | Equations
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Denmead, O. T., J. R. Freney, and J. R. Simpson. 1979. Studies of nitrous oxide emission from a grass sward. Soil Science Society of America Journal. 43(4):p. 726-728. |
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| DOI: 10.2136/sssaj1979.03615995004300040020x |
| Web URL(s):
https://dl.sciencesocieties.org/publications/sssaj/pdfs/43/4/SS0430040726
Last checked: 11/11/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
| 
MSU catalog number: b2199342a |
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