Study of the influence of the biopreparation Lignohumate in combination with mineral fertilizers on the productivity of winter barley in the conditions of the southern foothill zone of Adygea

N.I. Devterova

Abstract. The article presents the results of field experiments conducted on meadow-chernozem leached drained super-deep clay soil in order to study the effect of the humic biopreparation Lignohumate in combination with mineral fertilizers on the productivity of winter barley. The experiment included the following: disking of the soil to a depth of 12-16 cm; fertilizers: sulfoammophos N20P20S8 (200 kg/ha of physical weight, N40 active substance per 1 ha), ammonium nitrate: NH4 NO3 (106 kg/ha of physical weight, N36) and the biopreparation during the heading and grain filling phases. Fertilizer doses were calculated based on the limiting element nitrogen. Treatment with the biopreparation according to the following variants: 1. 0.0 control; 2. 0.6; 3. 0.8; 4. 1.0 l/ha. The combined use of the biopreparation, mineral fertilizers and plant protection products helped to optimize the phosphorus content (0.32 – 0.41%), the interaction of the macronutrients potassium and calcium and their content in plant leaves, and had a positive effect on the total number of plants and productive stems, the number and weight of 1000 grains. The most effective method was the introduction of: N40P40S16 (sulfoammophos) + N36 (ammonium nitrate) + Lignohumate (0.8 l/ha). In this variant, the yield was 39.5% higher than in the control. The cost of gross output increased due to the yield growth from 49.4 to 74.1 thousand rubles. The conditional net income and profitability levels also increased to 60.4 %. The practical application of the developed cultivation method contributed to the stabilization of soil fertility – the humus content at the beginning of 4.2% and the end of the studies 4.03 % in one provision group; an increase in the productivity of winter barley by 25.6–39.5 %, an increase in the protein content in grain by 10.38–11.34 %.

Keywords: winter barley, soil cultivation, biopreparation Lignohumate, fertilizers, plant protection products, the effect of use, leaf diagnostics, fertility elements, yield, yield increases, crop structure, grain quality

For citation.  Devterova  N.I.  Study  of  the  influence  of  the  biopreparation  Lignohumate  in  combination with  mineral  fertilizers  on  the  productivity  of  winter  barley  in  the  conditions  of  the  southern  foothill zone of Adygea.  News of the Kabardino-Balkarian Scientific Center of RAS. 2024. Vol. 26. No. 6. Pp. 268–279. DOI: 10.35330/1991-6639-2024-26-6-268-279