Static absorption and soil column leaching methods were used to study ammonia volatilization and N leaching characteristics from six controlled/slow-release fertilizers. The results showed that all the controlled/ slow-release fertilizers decreased ammonia volatilization and N leaching in varying degrees. Total ammonia volatilization of six controlled-release fertilizers decreased by 16.62%, 23. 78%, 32. 15%, 0. 11%, 16.59% and 37.78% than common urea respectively,and N leaching amount of the fertilizers decreased by 15.84%, 38.27%, 68. 87%, 46.17%, 52.51% and 62.01% than common urea respectively. The results also indicated that ammonia volatilization from controlled/slow-release fertilizers was closely related to soil urease activity and pH value.