Evaluation of the effectiveness of the use of humic fertilizers in the cultivation of spring barley in the soil and climatic conditions of the central chernozem region

The results of studies of the effect of humic fertilizers of domestic (ECO-SP) and foreign (Fulvigrain Classic, Gumiful Pro) production on the yield and quality of spring barley grain of the Prometheus variety, when cultivated according to the following scheme: without treatment with humic fertilizers (control); ECO-SP – seed treatment (0.5 l/t) + treatment of plants in the tillering phase (0.5 l/ha) + treatment of plants in the tube exit phase (0.5 l/ha); Fulvigrain Classic – seed treatment (0.8 l/t) + treatment of plants in the tillering phase (0.4 l/ha) + treatment of plants in the tube exit phase (0.4 l/ha); Humiful Pro – seed treatment (0.1 l/t) + processing of plants in the tillering phase (0.1 l/ha) + processing of plants in the tube exit phase (0.1 l/ha). The work was carried out in 2020–2022. in the experiments of the Kursk Federal Agrarian Scientific Center (Kursk region, Kursk district, Cheryomushki village), the soil of the experimental site is a typical powerful, heavy-loamy chernozem. It was found that the treatment of spring barley seeds with humic fertilizers increased their germination energy by 2…7 %, laboratory germination by 3…5 % in comparison with the variant where the seeds were not treated with humic fertilizers. When processing seeds and plants with humic fertilizers, the yield of spring barley increased by 0.46…0.56 t/ha or by 12.7…15.5 %, grain size – by 0.7… 1.6 %, protein content – by 0.2… 0.4 %, starch – by 0.4…0.9 %. Higher yields of spring barley were provided by humic fertilizers ECO-SP and Fulvigrain Classic – 0.52…0.56 t/ha. The effectiveness of humic fertilizer Humiful Pro was lower, the yield increase from its use was 0.46 t/ha or 12.7 %, grain size increased by 0.7 %, protein content – by 0.6 %, starch – by 0.3 % compared to the control.