Influence Of Foliar Sulfur, Chloride and Nitrogen On Winter Wheat Grain Yield and Total Nitrogen (TRITICUM AESTIVUM L.).
Poster Number 2108
Tuesday, November 5, 2013
Tampa Convention Center, East Hall, Third Floor
Sulochana Dhital1, Jeremiah L. Mullock2, William R. Raun1 and Bee Khim Chim3, (1)Department of Plant and Soil Sciences, Oklahoma State University, Stillwater, OK (2)Plant and Soil Sciences, Oklahoma State University, Stillwater, OK (3)Virginia Tech, Blacksburg, VA
Optimum use of nitrogen (N) is a key component in improving wheat grain yield and quality. The combined effect of other nutrients with N can have a positive impact on crop production. Using sulfur (S) and chloride (Cl) in wheat and other cereals has received increased attention in recent years. Foliar S and Cl can assist in optimizing wheat yield and total N, especially in sandy soils with low organic matter where deficiencies are expected. Winter wheat studies were conducted for 3 site-years at Lake Carl Blackwell (LCB) and Lahoma (LAH) in the fall of 2011 and 2012 to evaluate the effect of flag leaf applied foliar N, S and Cl on winter wheat grain yield and grain N. Two N rates, 10 and 20 kg N ha-1, as urea triazone (N-SURE, 28-0-0) and urea ammonium nitrate (UAN, 28-0-0) were foliar applied. Treatments included foliar application of gypsum (6 kg S ha-1) and calcium chloride at a rate of 10 kg Cl ha-1applied with the help of CO2 backpack sprayer. Results showed total grain N increased with increasing preplant N rate at LCB and LAH. With increasing preplant N, a linear increase in yield was observed at LAH and a quadratic increase in yield at LCB. There was no response to foliar N, Cl and S at both locations. This study indicated that S and Cl fertilization did not increase yield and protein.
