SU1137096A1 - Inhibitor of nitrification of nitrogen fertilizer - Google Patents

Abstract

NITRIFICATION NITROGEN FERTILIZER INHIBITOR, including dicyandiamide, characterized in that, in order to increase the inhibitory effect and strength of fertilizer granules, it additionally contains 4-amino-1, 2,4-triazole in the following ratio, wt.%: 4-AMINO -1,2,4-triazole 25-95 Dicyandiamide 5-75 (L with

Description

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Co-Co: The invention relates to ammonium nitrification nitrogen inhibitors in soil and can be used in agriculture. Triazole derivatives are known to be used as inhibitors of nitrification of nitrogen fertilizers. A disadvantage of the known inhibitor is a decrease in the strength of the fertilizer pool. The closest to the proposed is the nitrification inhibitor dicyandiamide 2j. The disadvantage of this nitrification inhibitor is rather fast when it is used, the nitrification of ammonium nitrogen. The purpose of the invention is to improve the inhibitory effect and strength of the inhibitor inhibitor. This goal is achieved by the fact that the nitrification inhibitor of azo fertilizers, including dicyandide, additionally contains 4-amine 1,2,4-triazole in the following ratio of components, maCo%: 4-AMIN-1,2, 4-triazole 25- 95 Dicyandiamide 5-73 The use of this mixture as a nitrification inhibitor reduces the rate of nitrification, increases the strength of the granules and leads to a synergistic effect, i.e. in Lenin, when a mixture of two substances allows to obtain a qualitatively new positive effect. The limiting values of the components in the mixture are due to the following facts: with an increase in the content of dicyandiamide in the mixture of more than 75%, the rate of nitrification becomes lower than with only 4-amino-1, 2,4-triazole, and a decrease in the diamide below 5% does not change the rate 62 nitrification compared with 4-amino-1, 2,4-triazole. The strength of carbamide granules with additives of the proposed inhibitor is characterized by the data given in table. 1. Example By mixing a mixture of 4-amino-1,2,4-triazole inhibitors (ATS) and dicyandiamide (D1-SCHA) are prepared. To 215 mg of urea, add 2 mg of an inhibitor mixture and inject a fertilizer into a 500 ml vessel containing 500 g of airborne - dry soil (black earth or gray earth). The nitrogen content is 200 mg per 1 kg of soil, the content of inhibitor in the fertilizer is 2% of the amount of nitrogen. The soil is moistened to 60% of full capacity, kept in thermostat 28 for 14 days, and then the content of ammonium and nitrate nitrogen in it and the rate of nitrification are determined. For comparison, the nitrification of urea containing no inhibitors, as well as urea containing either ATC or DCA, was studied under similar conditions. The test results of inhibited fertilizers based on carbamide are given in Table. 2. Analysis of the results shows that with the simultaneous use of ATS and DCDA in urea, the rate of nitrification of nitrogen fertilizers decreases by 1.5 times on black soil, and on gray soil - by 5 times compared with ATS, at the same time the number of assimilable nitrogen forms increases from 86.5 to 93.1% (sierozem). The simultaneous introduction of ATS and DCDA in urea improves the strength of granules by 2 times and increases the degree of nitrogen utilization of fertilizers in the soil. Table 1

Claims (1)

NITROGEN FERTILIZER NITRIFICATION INHIBITOR, including dicyandiamide, characterized in that, in order to increase the inhibitory effect and strength of the fertilizer granules, it additionally contains 4-amino-1,2,4-triazole in the following ratio, wt.%: 4-amino-1,2,4-triazole 25-95 Dicyandiamide ’5-75 Q