Abstract
Very few compounds have been shown to possess both urease and nitrification inhibitor activity. The ability to control both of these processes by the addition of a single additive is, however, highly desirable. During our work with the urease inhibitor thiophosphoryl triamide (TPTA) we have discovered that this material affects inhibition of urea hydrolysis by urease and ammonium oxidation by nitrifiers. This discovery suggests the pursuit of a new class of agrochemical compounds which can be designated as ammonium/nitrate ratio control agents because of their potential ability to provide controllable levels of ammonium and nitrate to cropping systems.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Arora RP, Sachver MS, Sud YK, Luthra VH and Subbiah BV (1980) Fate of Fertilizer Nitrogen in a Multiple Cropping System. Soil Nitrogen as a Fertilizer or Pollutant, IAEA, Vienna, Austria, pp 3
Bock BR (1986) Increasing cereal yields with higher ammonium/nitrate ratios: review of potentials and limitations. J Environ Sci Health A21: 723–758
Bock BR (1987) Agronomic differences between nitrate and ammoniacal nitrogen. Proceedings of the 37th Annual Meeting of the Fertilizer Industry Round Table, New Orleans, Louisiana, November 2–4
Bremner JM, McCarthy GW, Yeomans JC and Chai HS (1986) Effects of phosphoroamides on nitrification, denitrification, and mineralization of organic nitrogen in soil. Commun Soil Sci Plant Anal 17: 369–384
Bundy LG and Bremner JM (1973) Inhibition of nitrification in soils Soil Sci Soc Amer Proc 37: 396–398
Evrard TO (1982) Use of aluminum tris(-O-ethyl phosphonate) as an ammonium nitrification compound. U.S. Patent 4 315 762, February 16
Gautney J, Kim YK and Gagen PM (1984) Feasibility of cogranulating the nitrogen loss inhibitors dicyandiamide, thiourea, phenyl phosphorodiamidate, and potassium ethyl Exanthate with urea. Ind Eng Chem Prod Res Dev 23: 483–489
Gautney J (1987) Fluid fertilizers containing thiophosphoryl triamide. U.S. Patent 4 676 822, June 30
Goehring M and Niedenzu K (1956) Phosphorus-oxygen compounds Part I The synthesis of the amides of phosphoric acid and thiophosphoric acid. Chemische Berichte 89: 1768–1771
Hauck RD (1984) Epilogue. Nitrogen in Crop Production: 781–786, RD Hauck, Ed., American Society of Agronomy, Inc., Soil Science Society of America, Inc., Madison, Wisconsin
Kolc JF, Swerdloff MD, Rogic MM, Hendrickson LL and Van Der Puy M (1985) N-aliphatic and N, N-aliphatic phosphoric triamide urease inhibitors and urease inhibited urea based fertilizer compositions. U.S. Patent 4 530 714, July 23
Nelson DW (1982) Gaseous losses of nitrogen other than through denitrification. Agricultural Soils 9: 327–363, FJ Stevenson, Ed., American Society of Agronomy, Inc, Crop Science Society of America, Inc., Soil Science Society of America, Inc., Madison, Wisconsin
Nelson DW (1982) Nitrogen in Agricultural Soils. American Society of Agronomy, Inc, Soil Science Society of America, Inc., Madison, Wisconsin
Radel RJ (1986) Thiophosphoryl triamide as a urease inhibitor. U.S. Statutory Invention Registration No. H 25, February 4
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Radel, R.J., Randle, A.A., Gautney, J. et al. Thiophosphoryl triamide: A dual purpose urease/nitrification inhibitor. Fertilizer Research 31, 275–280 (1992). https://doi.org/10.1007/BF01051279
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01051279