Submitted to: BARC Poster Day
Publication Type: Abstract Only
Publication Acceptance Date: April 25, 2006
Publication Date: April 26, 2006
Citation: Oriola, B., Cavigelli, M.A. 2006. The effects of cropping systems on the emission of nitrous oxide from soil [abstract]. BARC Poster Day. S21
Global warming is an arising problem which is due to an increase of greenhouse gases (carbon dioxide, methane and nitrous oxide) in the atmosphere. Agriculture contributes about 75 percent of total anthropogenic nitrous oxide (N2O) release to the atmosphere. I measured soil N2O flux from three different cropping systems: an organic, a chisel tillage, and a no tillage system. Samples were taken every week to every month, depending on time of year, from April to October in 2005. Initial results show that peak N2O flux in all three systems occurs in June, following nitrogen fertilization or killing of a leguminous cover crop. Fluxes during many other parts of the year are lower by one or two orders of magnitude. There were no differences in total N2O flux among the three cropping systems. While there were no significant relationships between N2O flux and soil moisture or soil temperature when all data points were included, these relationships were both significant and positive when only N2O fluxes > 2.5 mg N2O-N m-2 min-1 were included in the analyses.