NITROGEN NUTRITION AND ITS RELATIONSHIP WITH SUGAR BEET PRODUCTIVITY: RESULTS OF FIELD RESEARCH IN THE WESTERN FOREST-STEPPE OF UKRAINE
DOI:
https://doi.org/10.32636/agroscience.2026-(5)-1-4Keywords:
sugar beet, α-amino nitrogen, soil-climatic conditions, adaptive fertilization, precision agricultureAbstract
The aim of the study was to determine the relationship between nitrogen fertilization and sugar beet productivity under the conditions of the Western Forest-Steppe of Ukraine. Field observations were conducted at PPE “Zakhidnyi Buh” during 2018–2024 on different soil groups, including carbonate and sandy soils as well as chernozems and loess. Results indicated that increasing nitrogen doses were associated with a positive but weak yield response. The highest productivity was recorded within the range of 140–170 kg N·ha⁻¹, which can be considered as the practical yield plateau. Nitrogen application exceeding 180 kg N·ha⁻¹ did not provide additional yield increase and was accompanied by deterioration of technological quality (reduced sucrose content, increased α-amino nitrogen). The optimal range for chernozems was identified at 130–160 kg N·ha⁻¹, while for carbonate and sandy soils it was 150–180 kg N·ha⁻¹. The study concludes that an adaptive, diagnostics-driven nitrogen management strategy, integrating soil and plant-based monitoring, is the most effective under the studied conditions
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