The use of vermihumus and the biological preparation «Nanoverm» obtained from it for growing spring barley

Abstract

Goal. To study the effectiveness of vermihumus and the biological preparation «Nanoverm» obtained from it as a high-quality complex environmentally friendly organic fertilizer for growing spring barley. Methods. Field (observation, collection of primary data), laboratory (study of stem damage by diseases, determination of grain moisture and the presence of weed impurities in it), comparative descriptive (comparison of plant development for their evaluation), mathematical (determination of cost and profitability). Results. It was established that the use of vermihumus and «Nanoverm» with a single treatment of plants contributed to an increase in root length by 3.9–5.6 cm, and stem length by 2.5–7.2 cm compared to the control. The greatest effect was observed with vermihumus treatment at a dose of 3 l/ha. Productive tillering of plants increased with the use of micro fertilizers and amounted to 2.0–2.3 standard units vs. 1.7 in the control. The data obtained for 2020–2021 indicated that most spring barley plants affected by root rot were in the control variant (30%) with a disease development of 5.3%. It was noted that for the cultivation of spring barley of the Dante variety with the addition of vermihumus (1.5 l/ha), the conditional net profit was UAH 6,467/ha, the cost of grain was UAH 2,947/t, and the profitability was 56.5%. With the use of «Nanoverm» in doses of 1.5 and 3 l/ha, the profitability was lower and amounted to 41.7 and 45.0%, respectively. Conclusions. It was established that during the treatment of spring barley of the Dante variety with «Nanoverm» at a dose of 3 l/ha and vermighumus at a dose of 1.5 and 3 l/ha, no damage to the plants by root rot was observed. During the treatment with «Nanoverm» at a dose of 1.5 l/ha, the damage to plants by root rot was reduced by 4-6 times. It was proven that the use of vermihumus and «Nanoverm» at a dose of 3 l/ha ensured a yield of 3.57 and 4.01 t/ha, respectively. With the introduction of vermihumus and «Nanoverm» at a dose of 1.5 l/ha, the productivity was 3.88 and 3.48 t/ha, respectively. It was noted that with the use of vermighum in doses of 1.5 and 3 l/ha, the level of profitability was 56.5 and 59.1%. When treated with «Nanoverm» at doses of 1.5 and 3 l/ha, profitability was lower — 41.7 and 45.0%.