Summary
The formation of mineral nitrogen species and of organic nitrogen was studied in three different types of soils in relation to the application of the nitrification inhibitor nitrapyrin. The results indicate that nitrification brings about a deficit in total mineral nitrogen and a concomitant surplus in non biomass organic nitrogen. This phenomenon increases with increasing levels of applied ammonium nitrogen and soil organic matter. The phenomenon is considered to be due to the reaction of the transient nitrite formed with soil phenolic compounds and appears to be of significance in all soils in which nitrification occurs, even neutral to alkaline and low carbon soils.
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El Azhar, S., Vandenabeele, J. & Verstraete, W. Nitrification and organic nitrogen formation in soils. Plant Soil 94, 383–399 (1986). https://doi.org/10.1007/BF02374332
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DOI: https://doi.org/10.1007/BF02374332