SYNTHESIS OF NITRIFICATION INHIBITORS BASED ON Mn(II) COORDINATION COMPOUNDS
DOI:
https://doi.org/10.15421/jchemtech.v33i4.328637Keywords:
ammonium, manganese, dicyandiamide, nitrate, nitrification, coordination compound, 4-amino-1,2,4-triazoleAbstract
The combination of two effective nitrification inhibitors, such as dicyandiamide (DCD) and 4-amino-1,2,4-triazole (ATC) in manganese coordination compounds can exhibit a synergistic effect in relation to the nitrification process of ammonium nitrogen in the soil. As a result of this effect, the efficiency of nitrogen fertilizer use is predicted to increase. Manganese, as a biometal, after the end of the inhibitor action can be involved in biochemical reactions of crop development. Therefore, the aim of the work was the synthesis of nitrification inhibitors (NIs) based on Mn(II) coordination compounds. A number of studies of the structure, composition and biological activity of the synthesized compounds were carried out. As a result, four substances with a ligand ratio of 4-amino-1,2,4-triazole and dicyandiamide (1 : 1, 2 : 1, 1 : 2, 2 : 2) were obtained. Their solubility in water, aqueous solution of fertilizer UAN-28 and pure KAS-28 was established. Thermal destruction of the studied substances was studied. Infrared spectroscopy proved 1,2-coordination of 4-amino-1,2,4-triazole through nitrogen atoms. The addition of dicyandiamide is carried out through the C≡N functional group. The manganese content in complex compounds was established. The degree of nitrification inhibition and the dynamics of nitrification rate changes were studied in laboratory conditions.
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