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Nitrous Oxide Flux from Poultry‐Manured Erosion Plots and Grass Filters after Simulated Rain
Author(s) -
Coyne M. S.,
Gilfillen R. A.,
Blevins R. L.
Publication year - 1994
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq1994.00472425002300040031x
Subject(s) - denitrification , nitrous oxide , denitrifying bacteria , flux (metallurgy) , environmental science , surface runoff , environmental chemistry , manure , volatilisation , hydrology (agriculture) , nitrogen , environmental engineering , soil science , agronomy , chemistry , ecology , engineering , geotechnical engineering , organic chemistry , biology
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 2 O) may be evolved these settings. It is a radiatively important trace gas and intermediate in the denitrification pathway and several other microbial processes. We measured N 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 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 2 O flux in the three most dynamic erosion plots was 755 µg N 2 O‐N m −2 h −1 , which was 39% of the maximal denitrification rate measured in acetylene‐blocked, NO − 3 ‐amended soil cores. Nitrous oxide flux immediately after rainfall was greater than N 2 O flux measurements reported for similar agricultural settings.