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

M. S. Coyne, R. A. Gilfillen, R. L. Blevins

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


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 (N2O) 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 N2O 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 N2O 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 N2O flux in the three most dynamic erosion plots was 755 μg N2O-N m-2h-1, which was 39% of the maximal denitrification rate measured in acetylene- blocked, NO3/--amended soil cores. Nitrous oxide flux immediately after rainfall was greater than N2O flux measurements reported for similar agricultural settings.

Original languageEnglish
Pages (from-to)831-834
Number of pages4
JournalJournal of Environmental Quality
Issue number4
StatePublished - 1994

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution
  • Management, Monitoring, Policy and Law


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