|Del Grosso, Stephen|
|Rosen, Carl -|
Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: March 23, 2010
Publication Date: March 26, 2010
Repository URL: http://www.fertilizer.org/layout/set/print/HomePage/LIBRARY/Conference-papers/Agriculture-Conferences/2010-IFA-New-Ag-International-Event
Citation: Halvorson, A.D., Del Grosso, S.J., Venterea, R.T., Rosen, C., Smith, J.L., Parkin, T.B., Hatfield, J.L., Sistani, K.R., Dell, C.J., Watts, D.B. 2010. The effect of enhanced-efficiency fertilizers on nitrous oxide emissions from various cropping systems. Meeting Abstract. p - see link above Technical Abstract: Nitrous oxide emissions from irrigated cropping systems with different N sources applied at N rates ranging from 0 to 246 kg N ha-1 from 2007-2009 near Fort Collins, CO will be emphasized in this presentation. Nitrous oxide fluxes were measured weekly using static, vented chambers and gas chromatograph analyzer. Cumulative growing season N2O emissions from urea, UAN, controlled-release polymer-coated urea (ESN), and stabilized N sources (SuperU, and UAN with AgrotainPlus) were evaluated under several cropping systems at several ARS locations. Results from the Fort Collins studies will be emphasized were reduction in N2O emissions >50% were observed using enhanced-efficiency fertilizers when compared to dry granular urea. Results from 6 other ARS locations comparing N2O emissions from either urea or UAN with emissions from enhanced efficiency N fertilizers will also be briefly presented. Current tillage and fertilizer N technologies that delay release and transformation of N can substantially reduce N2O emissions under specific cropping conditions.