Nitrous oxide emissions from fertilized soils: Summary of available data
- Science and Policy Associates, Inc., Washington, DC (USA)
Direct measurements of fertilizer-derived N{sub 2}O emission data from 104 field experiments reported in agriculture and soil science literature that were obtained between 1979 and 1987 were summarized and used to estimate worldwide fertilizer-derived N{sub 2}O emissions. Although without statistical determination, there appears to be a trend between emissions and type and quantity of fertilizer applied; the available data does not indicate a trend between emissions and a particular soil type or agriculture system. Using the fraction of the N fertilizer evolved as N{sub 2}O and fertilizer consumption estimates for five fertilizer types, 0.1 to 1.0 Tg N{sub 2}O-N (avg. 0.3; median 0.2) were estimated to be released during the sampling period. If these estimates are doubled to account for emissions after the sampling period and emissions from fertilizer lost in drainage water and groundwater, the expected range would be 0.2 to 2.1 Tg N{sub 2}O-N (avg. 0.7; median 0.5) emitted into the atmosphere in 1984. The magnitude of this estimate is in agreement with recent global estimates. If 100 Tg N fertilizer are consumed worldwide in the year 2000, the global release of fertilizer-derived emissions into the atmosphere will probably not exceed 3 Tg N{sub 2}O-N in the year 2000. It is estimated that 23 to 315 Gg N{sub 2}O-N were emitted into the atmosphere from fields of cultivated leguminous crops in 1986. Future research needs were suggested.
- OSTI ID:
- 6327316
- Journal Information:
- Journal of Environmental Quality; (USA), Journal Name: Journal of Environmental Quality; (USA) Vol. 19:2; ISSN 0047-2425; ISSN JEVQA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
AGRICULTURE
AIR POLLUTION
CHALCOGENIDES
DATA ANALYSIS
EMISSION
ENVIRONMENTAL IMPACTS
FERTILIZERS
GLOBAL ASPECTS
INDUSTRY
LEGUMINOSAE
MAGNOLIOPHYTA
MAGNOLIOPSIDA
NITROGEN COMPOUNDS
NITROGEN OXIDES
NITROUS OXIDE
OXIDES
OXYGEN COMPOUNDS
PLANTS
POLLUTION
POLLUTION SOURCES
SOILS