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Title: The effect of enhanced-efficiency fertilizers on nitrous oxide emissions from various cropping systems

Author
item Halvorson, Ardell
item Del Grosso, Stephen - Steve
item Venterea, Rodney - Rod
item ROSEN, CARL - University Of Minnesota
item Smith, Jeffrey
item Parkin, Timothy
item Hatfield, Jerry
item Sistani, Karamat
item Dell, Curtis
item 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 above

Interpretive 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.