Location: Soil and Water Management ResearchTitle: Nitrous oxide emissions from fertilized soil: Can we manage it? Author
Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 11/1/2016
Publication Date: 2/16/2017
Citation: Venterea, R.T. 2017. Nitrous oxide emissions from fertilized soil: Can we manage it? 3rd Annual Conference on NITROGEN: Minnesota's Grand Challenge & Compelling Opportunity Conference. February 16, 2017. Mankato, Minnesota.
Technical Abstract: Cropped fields in the upper Midwest have the potential to emit nitrous oxide (N2O) and nitric oxide (NO) gases resulting from soil transformation of nitrogen (N) fertilizers applied to crops such as corn and potatoes. Nitrous oxide is a potent greenhouse and also an important in ozone depleting chemical, while NO can contribute to downwind N deposition, and be re-emitted as N2O from receiving ecosystems. The mitigation of both N2O and NO emissions may be an effective strategy for offsetting greenhouse gas emissions and reducing losses of applied N. While the rate of N fertilizer application exerts some control over N2O and NO gas emission rates, a variety of other management practices and environmental factors interact to regulate these emissions. Observation-based studies are essential for improving models, developing accurate inventories, and documenting offsets. Since 2003, we have been examining the effects of management factors including: tillage, crop rotation, irrigation, and fertilizer chemical form and application method on N2O and NO emissions from corn and potato production systems using chamber-based measurement techniques. In this presentation, we will discuss reasons why N2O and NO emissions from soil can be important and discuss what we know about how management practices can affect these emissions, based on recent research with a focus on studies done in Minnesota.