235-2 Impacts of Nitrogen Placement and Inhibitors on Ammonia Volatilization, Nitrous Oxide Emissions and Corn Yields.

See more from this Division: SSSA Division: Nutrient Management and Soil and Plant Analysis
See more from this Session: The Impact of 4Rs (Source, Rate, Time and Place) on Crop Yield Oral

Tuesday, November 8, 2016: 10:10 AM
Phoenix Convention Center North, Room 132 A

Craig F. Drury1, Xueming Yang2, W. Dan Reynolds1, Wayne Calder2, Tom Oloya2 and Alexander Woodley3, (1)Harrow Research and Development Centre, Agriculture & Agri-Food Canada, Harrow, ON, CANADA
(2)Harrow Research and Development Centre, Agriculture & Agri-Food Canada, Harrow, ON, Canada
(3)Harrow Research & Development Center, Agriculture & Agri-Food Canada, Harrow, ON, Canada
Abstract:
Ammonia volatilization, nitrous oxide emissions and nitrate leaching can reduce the amount of inorganic 0nitrogen available for crop production.  The objective was to determine the effectiveness of nitrogen application methods (broadcast, broadcast & incorporated, injected), application timing (preplant versus sidedress) and inhibitors (no inhibitor, urease inhibitor or urease & nitrification inhibitors) on ammonia volatilization, nitrous oxide emissions and crop N uptake and yields on a clay loam soil. Both nitrogen placement and urease inhibitors reduced ammonia volatilization losses.  Nitrous oxide emissions were increased when ammonia volatilization losses were reduced, however the combination of urease and nitrification inhibitors reduced both ammonia and nitrous oxide emissions. Management practices which reduced ammonia volatilization were found to increase crop yields and N uptake.

See more from this Division: SSSA Division: Nutrient Management and Soil and Plant Analysis
See more from this Session: The Impact of 4Rs (Source, Rate, Time and Place) on Crop Yield Oral