281-2 Nitrogen Management of Winter Wheat in Kansas.

Poster Number 2106

See more from this Division: SSSA Division: Soil Fertility & Plant Nutrition
See more from this Session: Soil Fertility and Plant Nutrition Division and Nutrient Management and Soil and Plant Analysis Division Graduate Student Poster Competition (MS degree)

Tuesday, November 5, 2013
Tampa Convention Center, East Exhibit Hall

Tim J Foster, Agronomy Department, Kansas State University, Manhattan, KS and David B. Mengel, Department of Agronomy, Kansas State University, Randolph, KS
Poster Presentation
  • N Mangement of Winter Wheat In KS.pdf (5.9 MB)
  • Abstract:
    Several tools are available to wheat producers to reduce N losses by leaching and denitrification.  Applying N as close as possible to the time of uptake by the plant is one commonly used tool to avoid N loss.  Another strategy is the use of nitrification inhibitors (NI) with ammonium N sources such as anhydrous ammonia (AA). Maintaining N in the ammonium form by reducing nitrification can help reduce leaching and denitrification. This project was conducted during the 2011-2012 and 2012-2013 winter wheat growth seasons, at three locations in Kansas on soils differing in both denitrification and leaching potential. The study compared the effectiveness of fall preplant AA with/without NI to the traditional practice of spring topdressing with urea as methods of applying N to winter wheat.  Fall and winter precipitation varied widely between the locations, resulting in variable N use and yield.  Minimal losses from fall ammonia were seen at Manhattan in 2012 and 2013, as indicated by high N recovery.  Recovery was lower with topdress urea.  Similar trends were observed at Ottawa in 2013, with no differences in yield or N use seen at Ottawa in 2012 between N application systems.  At the sandier Kansas River Valley site, yield and N uptake were severely impacted by disease in 2012.  In 2013, the Silver Lake site showed similar, high levels of N use from both fall AA and spring urea.

    See more from this Division: SSSA Division: Soil Fertility & Plant Nutrition
    See more from this Session: Soil Fertility and Plant Nutrition Division and Nutrient Management and Soil and Plant Analysis Division Graduate Student Poster Competition (MS degree)