Uman National University | today: 12/18/2025
| Author(s) | А. А. Berezovskyi, , Postgraduate student at the Department of Biology, Uman National University (Uman, Ukraine) | ||
|---|---|---|---|
| Category | 201 "Agronomy" | ||
| year | issue | ||
| pages | 5-9 | index UDK | 581.132:[633.16"321":631.86/.87]:631.559 | DOI | 10.32782/2310-0478-2025-2-5-9 (Link) |
| Abstract | The results of studies on the separate and combined effects of the biological products Biozlak (seed treatment before sowing – 1.0; 1.25; 1.5 l/t) and Baktiva (spraying crops – 250 g/ha) on the formation of net photosynthetic productivity of spring naked barley crops of the Natair variety.The research was conducted in the field and laboratory conditions of the Department of Biology at Uman National University during 2024 and 2025.Field experiments were conducted using a systematic method with three repetitions. The experimental design included variants with seed treatment before sowing with the biological product Biozlak at rates of 1.0, 1.25, and 1.5 l/t, against which the biological product Baktiva was applied at a rate of 250 g/ha. Naked barley seeds were treated with the above-mentioned rates of the Biozlak biological product one day before sowing. Against the background of treating naked barley seeds with Biozlak, the crops were sprayed in the tillering phase with a DS-3WF-3 battery sprayer with the biological product Baktiva at a rate of 250 g/ha, based on a working solution consumption rate of 200 l/ha.The net photosynthetic productivity of crops was calculated using the method developed by O. O. Nychyporovych.Research has shown that in 2024 and 2025 when spring naked barley seeds were treated with the Biozlak biological product before sowing and with the Bactiva biological product as a background, the net photosynthetic productivity indicators increased by an average of 10–19% which is evidence of the positive effect of the complex use of biological preparations on the physiological and biochemical processes in spring naked barley plants, against which the growth of the leaf apparatus of plants and the passage of photosynthetic processes in them are activated. On average over the years of research, the highest net photosynthetic productivity indicators were formed in the interphase period of ‘emergence into the tube-ear emergence’ in the variant with pre-sowing treatment of seeds with the biological product Biozlak (1.5 l/t) followed by post-emergence application of the biological product Baktiva (250 g/ha), where the excess over the control variant was 19 and 16% for the years, respectively. | ||
| Key words | spring naked barley, biological products, net photosynthetic productivity | ||