Abstract
Laboratory studies on a sandy clay loam (Typic Ustochrept) alkaline soil showed that NH3 volatilization loss from surface-applied prilled urea during an 8-dya incubation under aerobic conditions was 27.5% of applied N (400 kg N ha-1) and was reduced to 8.9% when the urea was blended physically with pyrite in a 1:2 ratio; under anaerobic conditions the values for urea and pyrite-urea were 19.3 and 16.9%, respectively. Other treatments tested were urea-gypsum, neemcake-coated urea and polymer-coated urea. A 6% polymer coating showed the least NH3 volatilization under anaerobic conditions and was next best to pyrite-urea under aerobic conditions. A 3% polymer coating was slightly inferior to the 6% coating. Urea-gypsum and neemcake-coated urea did not differ very much from urea alone under anaerobic conditions, but under aerobic conditions neemcake-urea showed a significantly lower total NH3 loss compared to prilled urea alone and urea-gypsum.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Bangar KC, Kapoor KK, Mishra MM (1988) Effects of pyrite on conservation of nitrogen during composting. Biol Wastes 25:227–231
Blaise D, Prasad R (1993) Evaluating pyrites as a nitrification inhibitor. Fert News 38:43–45
Buresh RJ (1987) Relative susceptibility of conventional and experimental nitrogen sources to ammonia loss from flooded rice fields. Fert Res 13:139–153
Chauhan HS, Mishra B (1989) Ammonia volatilization from a flooded rice field fertilized with amended urea materials. Fert Res 19:57–63
Fenn LB, Richards J (1986) Ammonia loss from surface applied urea-acid products. Fert Res 9:265–275
Fillery IRP, Vlek PLG (1986) Reappraisal of the significance of ammonia volatilization as an N loss mechanism in flooded rice fields. Fert Res 9:89–98
Gomez KA, Gomez AA (1984) Statistical procedures for agricultural research, 2nd edn. Wiley and sons, Singapore
Keeney DR, Nelson DW (1982) Nitrogen-inorganic forms. In: Page AL, Miller RH, Keeney DR (eds) Methods of soil analysis. Part 2. Chemical and microbiological properties, 2nd edn. Am Soc Agron, Madison, Wis, pp 643–698
Pichtel JR, Dick WA (1991) Sulfur, iron and solid phase transformations during the biological oxidation of pyritic mine spoil. Soil Biol Biochem 23:101–107
Rao DLN (1987) Slow-release urea fertilizers — effect on floodwater chemistry, ammonia volatilization and rice growth in an alkali soil. Fert Res 3:209–221
Reddy RVM, Mishra B, Sharma D (1986) Ammonia volatilization from three Mollisols following surface application of urea under laboratory conditions. J Indian Soil Sci 34:43–46
Simpson JR, Muirhead WA, Bowmer KH, Cai GX, Freeney JR (1988) Control of gaseous nitrogen losses from urea applied to flooded rice soils. Fert Res 16:31–47
Sudhakara K, Prasad R (1986) Ammonia volatilization from prilled urea, urea supergranules (USG) and coated USG in rice fields Plant and Soil 94:293–295
Vlek PLG, Stumpe JM; Byrnes BH (1980) Urease activity and inhibition in flooded soil systems. Fert Res 1:191–202
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Blaise, D., Prasad, R. Effect of blending urea with pyrite or coating urea with polymer on ammonia volatilization loss from surface-applied prilled urea. Biol Fert Soils 20, 83–85 (1995). https://doi.org/10.1007/BF00307846
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00307846