Mississippi State University
Varco, Jac J.
Henry, W. Brien
Golden, Bobby R.
Paz, Joel O.
Date of Degree
Graduate Thesis - Open Access
Master of Science
College of Agriculture and Life Sciences
Department of Plant and Soil Sciences
Urea based fertilizers are susceptible to N losses through volatilization, denitrification, and leaching. A field and incubation experiment were conducted at Mississippi State between 2013 and 2015 to evaluate the effect of fertilizer stabilizers on grain yield, N use, and N transformations in various soil textures. Stabilizers were applied to liquid urea-ammonium-nitrate (UAN) solution (32%) and granular urea (46-0-0) at labeled rates for 179 and 112 kg N ha-1 for the field and incubation experiments, respectively. Grain yield and N content at tasseling and physiological maturity were measured for the field experiment. Extracts from the incubation experiment were measured for NH4+-N and NO3⁻-N concentrations. Results from the field experiment suggest greater plant N accumulation, but inconsistent yield increases with fertilizer stabilizers. Incubation results indicate fertilizer stabilizers significantly decrease the rate of N transformations. Further research is necessary to determine the effects of stabilizers over N rates and yearly environmental conditions.
Nattrass, Michael Paul, "Stabilized Urea Fertilizer Effects on Corn Nitrogen Use Efficiency and Soil Nitrogen Transformations" (2016). Theses and Dissertations. 4035.