N-(n-Butyl)thiophosphoric triamide (NBPT) is the organophosphorus compound with the formula SP(NH2)2(NHC4H9). It is an amide of thiophosphoric acid. A white solid, NBPT is an "enhanced efficiency fertilizer", intended to limit the release of nitrogen-containing gases following fertilization.[1] Regarding its chemical structure, the molecule features tetrahedral phosphorus bonded to sulfur and three amido groups.

Use

NBPT functions as an inhibitor of the enzyme urease.[2] Urease, pervasive in soil microorganisms, converts urea into ammonia, which is susceptible to volatilization if produced faster than it can be utilized by plants. Approximately 0.5% by weight NBPT is mixed with the urea.[3]

See also

References

  1. ^ Rose, Terry J.; Wood, Rachel H.; Rose, Michael T.; Van Zwieten, Lukas (2018). "A re-evaluation of the agronomic effectiveness of the nitrification inhibitors DCD and DMPP and the Urease Inhibitor NBPT". Agriculture, Ecosystems & Environment. 252: 69–73. Bibcode:2018AgEE..252...69R. doi:10.1016/j.agee.2017.10.008.
  2. ^ Pan, Baobao; Lam, Shu Kee; Mosier, Arvin; Luo, Yiqi; Chen, Deli (2016). "Ammonia Volatilization from Synthetic Fertilizers and its Mitigation Strategies: A Global Synthesis". Agriculture, Ecosystems & Environment. 232: 283–289. Bibcode:2016AgEE..232..283P. doi:10.1016/j.agee.2016.08.019.
  3. ^ Zaman, M.; Zaman, S.; Quin, B.F; Kurepin, L.V; Shaheen, S.; Nawaz, S.; Dawar, K.M (2014). "Improving Pasture Growth and Urea Efficiency Using N inhibitor, Molybdenum and Elemental Sulphur". Journal of Soil Science and Plant Nutrition. doi:10.4067/S0718-95162014005000020.
Allikas: http://en.wikipedia.org/wiki/NBPT
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