Nitrous oxide flux from poultry-manured erosion plots and grass filters after simulated rain

Journal Article · Fri Jul 01 04:00:00 EDT 1994 · Journal of Environmental Quality

DOI:https://doi.org/10.2134/jeq1994.00472425002300040031x· OSTI ID:263109

Coyne, M S; Gilfillen, R A; Blevins, R L ^[1]

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1. Univ. of Kentucky, Lexington, KY (United States)

Adding carbon-rich materials to fields, like manure, may enhance denitrification. Grass filters which are used to trap surface runoff from these fields, may also provide a carbon-rich environment that favors water infiltration and denitrification. Nitrous oxide (N{sub 2}O) may be evolved in these settings. It is a radiatively important trace gas and intermediate in the denitrification pathway and several other microbial processes. We measured N{sub 2}O flux, after simulated rain, using a soil cover technique in poultry-manured plots and grass filters receiving their runoff. Intact soil cores were used to relate the N{sub 2}O flux to the denitrification potential of the plots. Nitrous oxide fluxes were smaller in grass filters than in manured plots, even though more denitrifying bacteria were present. The average N{sub 2}O flux in the three most dynamic erosion plots was 755 {mu}g N{sub 2}O-N m{sup -2}h{sup -1}, which was 39% of the maximal denitrification rate measured in acetylene-blocked, NO{sub 3}{sup -}-amended soil cores. Nitrous oxide flux immediately after rainfall was greater than N{sub 2}O flux measurements reported for similar agricultural settings. 16 refs., 2 figs., 4 tabs.

• Sponsoring Organization: USDOE
• OSTI ID: 263109
• Report Number(s): CONF-9101175--
• Journal Information: Journal of Environmental Quality, Journal Name: Journal of Environmental Quality Journal Issue: 4 Vol. 23; ISSN JEVQAA; ISSN 0047-2425
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
DENITRIFICATION
ECOLOGICAL CONCENTRATION
EMISSION
FIELD TESTS
GREENHOUSE GASES
MANURES
NITROUS OXIDE
SOILS