Effect of Application of Coated Urea and NBPT Urease Inhibitor On Greenhouse Gas Emissions in Cotton Production.
Poster Number 1304
Wednesday, November 6, 2013
Tampa Convention Center, East Hall, Third Floor
Zhou Tian1, Jim J. Wang2, Shuai Liu1, Gerald O. Myers1, Zengqiang Zhang3 and Sanku Datta Mudi1, (1)School of Plant, Environmental & Soil Sciences, Louisiana State University, Baton Rouge, LA (2)School of Plant, Environmental and Soil Sciences, Louisiana State University, Baton Rouge, LA (3)College of Resources and Environment, Northwest A&F University, Shaanxi, China
Nitrogen fertilization such as urea likely influences the intensity of emission of greenhouse gases and ammonia. Urease inhibitor (UI) has the potential to improve nitrogen use efficiency and minimize the ammonia volatilization losses from urea. The aim of this study was to investigate the effects of application of urea, coated urea, urea was treated with the urease inhibitor NBPT [N-(n-butyl) thiophosphoric triamide] and denitrification inhibitor DCD [Dicyandiamide] on greenhouse gas emissions from a cotton field. A randomized experiment design with five treatments: 1) Check (unfertilized); 2) Urea; 3) Coated Urea; 4) Urea + NBPT; 5) Urea + DCD. The different fertilizer treatments were applied to the surface of soil. The results showed that N fertilization generally increased the emission of N2O and CO2 while CH4 emission was not significant. Urea produced more N2O and CO2 emissions. Both the urease inhibitor NBPT and the nitrification inhibitor DCD reduced the release of N2O and delayed the peak of N2O emissions.
