Uman National University | today: 06/27/2025
| Author(s) |
Hospodarenko G.M., Doctor of Agricultural Sciences, Professor, Uman National University of Horticulture, Ukraine Lubych V.V., Candidate of Agricultural Science, Lecturer of Department of Technology of Storage and Processing of Grain, Uman National University of Horticulture, Ukraine Prytulyak R.M., Candidate of Agricultural Science, Associate Professor of Department of Biology, Uman National University of Horticulture, Ukraine Гавриленко В. С., , , |
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| Category | The Agronomy | ||
| year | 2025 | issue | Issue 106 Part 1 |
| pages | 356-369 | index UDK | 631.82–021.465:631:431.1:631.816.1]: 633.16 | DOI | 10.32782/2415-8240-2025-106-1-356-369 (Link) |
| Abstract | Aim. To determine agrochemical parameters of fertility of sod-podzolic chernozem under spring barley bare-grain crops with various fertilization systems. Methods. Field, laboratory, comparative, analytical, statistical. Results. The application of mineral fertilizers in crop rotation and directly under spring barley bare-grain significantly affects the nutrient regime of sod-podzolic chernozem. Fertilizer application in the experiment increases the content and reserves of mineral nitrogen compounds, mobile phosphorus and potassium compounds in the 0–20 cm soil layer. The best nutrient regime was observed with the application of full mineral fertilizer with high nitrogen doses. However, it is known that the optimal content of mobile phosphorus and potassium compounds in the soil for cereal crops is within 150 mg/kg. Therefore, in variants with phosphorus and potassium fertilizers applied at 70 kg/ha active ingredient, plants were sufficiently supplied with these nutrients, and they were not limiting factors for yield formation. The dynamics of nutrient content in the soil during the growing season of spring barley bare-grain were similar across all fertilization systems, with differences observed only in the amplitude of changes. The content of mobile phosphates in the soil depends more on fertilization than on weather conditions compared to mineral nitrogen compounds. For example, the difference in their content in unfertilized plots between study years was 4–9 mg/kg of soil at LSD05 = 5–6 mg/kg. On plots with full mineral fertilizer (N70P60K70), the difference was also insignificant – 4–5 mg/kg. The content of mobile potassium in the soil follows the dynamics of mobile phosphates. In the variants without potassium fertilizers, it ranged from 77 to 95 mg/kg of soil depending on nitrogen and phosphorus fertilizer doses, weather conditions, and sample collection timing. Conclusions. The highest content of potentially available nitrogen in the soil occurs at the beginning of the growing season of spring barley bare-grain. Differences are also observed between years of research. In 2023, in unfertilized plots, the content of mineral nitrogen compounds was 2.2 mg/kg or 31% higher than in 2021. In the variant with full mineral fertilizer N70P60K70, the difference was 4.4 mg/kg or 11%. During the grain ripening period of spring barley bare-grain, precipitation was 57.3 mm in 2021, 27.1 mm in 2022, and 61.4 mm in 2023, affecting the mineral nitrogen content in the soil. Therefore, by the end of the growing season, the content of mineral nitrogen compounds in the soil partially increases, indicating a significant decrease in its uptake by plants. At the same time, advantages of fertilized plots remained, although the difference between fertilizer variants decreased. | ||
| Key words | spring barley bare-grain, soil nutrient regime, fertilization systems, sod-podzolic chernozem, soil fertility | ||