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;
Presents the physio-chemical properties of ammonium nitrate limestone, and its production technology of mixing ammonium nitrate melt solution with limestone, and its efficay on the plantation of agricultural plants as well as its market prospects.
NH3 volatilization from surface-applied urea, diammonium phosphate (DAP), and calcium ammonium nitrate (CAN) was measured with chambers through which air was drawn continuously.
The N sources were calcium ammonium nitrate fertilizer applied at 120 kg N ha-1, biomass from Sesbania sesban, and no added N.
We analysed the stable isotope composition of emitted N2O in a one-year field experiment (June 1998 to April 1999) in unfertilized controls, and after adding nitrogen by applying slurry or mineral N (calcium ammonium nitrate).
Urea and calcium ammonium nitrate (CAN) were equally good for both maize and wheat; full and split N application gave no significant difference in yield.
Maize crop was grown at five lime rates 0, 0.5, 1.0, 2.0 and 4.0 t ha-1 and two N sources (calcium ammonium nitrate and urea).