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Title:   Author  item
                                            Halvorson, Ardellitem
                                            Del Grosso, Stephen

                                                         - *Steve*item
                                            Venterea, Rodney

                                                         - *Rod*item
                                            ROSEN, CARL - University Of Minnesotaitem
                                            Smith, Jeffreyitem
                                            Parkin, Timothyitem
                                            Hatfield, Jerryitem
                                            Sistani, Karamatitem
                                            Dell, Curtisitem
                                            Watts, Dexter
  Submitted to: Meeting Abstract
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 3/23/2010
                                    Publication  Date: 3/26/2010
                                    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 aboveInterpretive Summary:
                                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.


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