EFFICIENCY OF THE APPLICATION OF HUMIC PREPARATIONS IN FORMING THE YIELD OF WINTER WHEAT

Abstract

The relevance of the use of nitrogen inhibitors is determined by three main aspects, namely, reducing the amount of nitrogen fertilizers and, therefore, the chemical load on the environment, increasing the yield of agricultural crops, and economic feasibility. There is some information about the positive effect of the combined use of a nitrogen inhibitor and fulvic acid preparations, but there is no data on the role of humic substances such as nitrogen inhibitors. The results of the research showed a significant impact of the use of humic preparations on the formation of the yield of winter wheat. The use of UltraBoost for seed for pre-sowing treatment in the amount of 1 kg/t of seeds contributed to an increase in productivity by 0.22–0.29 t/ha, which was 4.4–6.4%. The norm of 1 kg/ha ensured a statistically significant increase in yield by 5–7.9%, which was 0.23–0.4 t/ha. In the variants of the experiment with a rate of 3 l/ha, the increase was 8.8–11% or 0.38–0.51 t/ha. The use of UltraBoost for NH3 and pre-sowing seed treatment contributed to an increase in yield by 7.1–7.5%. The rate of UltraBoost for NH3 of 1 l/ha provided an increase in yield by 0.25–0.4 t/ha, which in relative terms amounted to 3.9–7%. Twice as much rate led to an increase in productivity by 0.31–0.69 t/ha or by 10.4%. The use of nitrogen inhibitor UltraBoost for NH3 leads to an increase in the content of total nitrogen in the soil. In the variants with the application of 1 l/ha, an increase in the content was noted on average by 2.06 g/m3, which was 14.3%, and in the case of application of 2 kg/ha, the content of total nitrogen in the soil was higher on average by 3.28%, which was 22.7%. The rate of alkaline hydrolyzed nitrogen in these variants was higher by 3.5–8.8%. In variants with a rate of 1 l/ha of UltraBoost for NH3, the content of total nitrogen increased by 11.5%, and on variants with a rate of 3 l/ha – by 12.7%. The similar trend was also noted for the content of alkaline hydrolyzed nitrogen as the increase was 13.4 and 14.1%, respectively.