126-2 Fertilizer Management Practices to Increase Nitrogen Use Efficiency of Corn Under High Clay Soil.

See more from this Division: S03 Soil Biology & Biochemistry
See more from this Session: The Role of Soil Management in Influencing Nitrous Oxide Emissions and Microbial Processes
Monday, October 22, 2012: 1:20 PM
Duke Energy Convention Center, Room 204, Level 2
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Rakesh Awale1, Amitava Chatterjee1, Herman Kandel2 and Joel Ransom2, (1)Dept. of Soil Science, North Dakota State University, Fargo, ND
(2)Dept. of Plant Sciences, North Dakota State University, Fargo, ND
Application of Nitrogen (N) fertilizers in crop production agriculture has been identified as a major producer of Nitrous oxide (N2O), a potent greenhouse gas. Installing subsurface drainage system under crop production may influence the soil N2O emissions through altering soil moisture and temperature regimes. The use of improved N management practices such as slow release or inhibitor treated N fertilizers and split N application in corn (Zea mays L.) can potentially reduce N2O emissions by improving the coordination of the N availability and plant uptake. A two year field experiment will be initiated in 2012, at a NDSU experimental site near Fargo, North Dakota, to compare the N2O emissions from corn fields fertilized with urea, urea with Instinct (nitrification inhibitor), ESN (polymer coated urea), and UAN (split N application) with Agrotain (urease inhibitor) under tile drained and un-drained conditions with four replications. All the fertilizers are applied at the rate of 200 lb N ha-1 and a control plot with 0 N is also included. Nitrous oxide fluxes from the corn plots are measured biweekly during each growing season by sampling headspace air from the semi-permanent vented static PVC chamber and analyzing on gas chromatograph, equipped with electron capture detector. Our work will identify fertilizer N management strategies to minimize N2O emissions from corn fields grown in high clay soils under subsurface drainage condition.
See more from this Division: S03 Soil Biology & Biochemistry
See more from this Session: The Role of Soil Management in Influencing Nitrous Oxide Emissions and Microbial Processes