The properties of fertilizer appeared under the interaction behaviors between nitrogen fertilizer applied in soil and components of soil such as adsorption by soil,leaching and volatilization from soil as well as nitrification and denitrification of nifertilizer are regarded as its agrochemical properties.Although ammonium bicarbonate is easy to decompose and volatilize and inconvenient to store, transport and apply, laboratory simulating experiments have showed that ammonium bicarbonate is more easily adsorbed by soil, less leached from soil, as compared with ammonium sulphate and urea;and its volatilization sharply decreases after incorporating with soil;only the rate of nitrification is similar to that of ammonium sulphate and urea. There fore, if the method of deep application is adopted, its effect on crops in fields can also be similar to that of ammonium sulphate or urea.The volatilization process of ammonium bicarbonate, ammonium sulphate and urea can be simulated by power regression equation Y=Ax^b, and the correlation between the initial volatilization amount (mgN/h) and regression constant A is significant. Their nitrification process on different Boils can be simulated by exponential equation Y=Ae^bx their initial nitrification rate(%) and regression constants A and B are approximate on the same soil but very different on different soils, which indicates that nitrification rate of nitrogen fertilizer after it being applied in soil depends mainly on the soil properties.