Summary
A laboratory study was made of the influence of the sulpha drugs sulphathiazole, sulphanilamide, sulphapyridine, sulphaguanidine, sulphadiazine and sulphadiamidine on nitrification of urea applied to a sandy clay loam soil of pH 7.8. Sulphathiazole applied at 2 ppm inhibited the nitrification of urea most effectively. Sulphadiazine and sulphadiamidine were also found to have nitrification inhibitory properties and need further testing. About 14% of applied urea N accumulated as nitrites after 1 week of incubation. Application of sulpha drugs along with urea reduced nitrite accumulation. re]19760203
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Prasad, R., Reddy, R.N.S. Effects of sulpha drugs on nitrification of urea in soil. Plant Soil 48, 11–16 (1977). https://doi.org/10.1007/BF00015156
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DOI: https://doi.org/10.1007/BF00015156