Ammonia volatilization of different nitrogen fertilizer types was studied by German wind-tunnel system. Results showed that there were obvious differences in ammonia volatilization among different nitrogen fertilizer types; Under the same N rate and application method, compared to urea:(1) ammonia losses decreased by 22.5%, 3.2% and 8.3% from ammonium nitrate, calcium ammonium nitrate and ammonium sulphate nitrate, respectively; (2) under DMPP-added condition, ammonia losses only increased by 1.9% from urea and 2.0% from ammonium sulphate nitrate, respectively; thus, no obvious inhibition of DMPP on ammonia loss was found from urea and ammonium sulphate nitrate.