Effect of Different Nitrogen Fertilizations On Ammonia and Greenhouse Gas Emissions From a Sub-Tropical Wheat Field.
Poster Number 1216
Wednesday, November 6, 2013
Tampa Convention Center, East Hall, Third Floor
Shuai Liu1, Jim J. Wang2, Zhou Tian1, Stephen A. Harrison1 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
Different agricultural management practices likely influence air quality and greenhouse gas emissions. In this study, effect of urea, coated urea and ammonia sulfate application on NH3 and greenhouse gas (CO2, CH4 and N2O) emissions in subtropical wheat production were evaluated. Field emissions of NH3 and greenhouse gases were sampled based on active and passive chamber methods, respectively. Results showed that N fertilization generally increased the emission of N2O and CO2 while no significant CH4 emission was observed. Urea treatment yielded more N2O emission than ammonia sulfate and coated urea treatments whereas ammonia sulfate application increased CO2 respiration compared to same rate of urea. In addition, N2O and CO2 emissions were affected by the application rate, precipitation, soil moisture and temperature. Overall, the results suggest that coated urea along with the proper application time have the potential to reduce greenhouse gas emissions.
