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Information × Registration Number 0225U004881, (0121U107669) , R & D reports Title Theoretically substantiate and develop models of sustainable functioning of agrocoenosis of the Steppe zone with optimization of ecologically safe soil fertilization systems popup.stage_title Теоретично обґрунтувати та розробити моделі сталого функціонування агроценозів зони Степу за оптимізації екологічно безпечних систем удобрення ґрунту Head Chaban Volodymyr I., Кандидат сільськогосподарських наук Registration Date 22-12-2025 Organization State Institution "Institute of Grain Crops" of the National Academy of Agrarian Sciences of Ukraine popup.description1 The purpose of the research is to theoretically substantiate and develop models of sustainable functioning of agrocenosis of the Steppe zone with optimization of ecologically safe soil fertilization systems. popup.description2 The aim of the research was to develop and theoretically substantiate models for the sustainable functioning of agrocenoses in the Steppe zone through optimization of environmentally safe soil fertilization systems. The study was based on data from long-term stationary field experiments processed using theoretical, empirical, and experimental (field, laboratory, and statistical) methods. The adaptability of major field crops to current climate change was established; the effectiveness of organic, mineral, and organo-mineral fertilization systems under different soil tillage technologies was determined; and the patterns of fertility transformation of ordinary chernozem were identified. It was demonstrated that organic and organo-mineral fertilization systems ensure stabilization of soil physicochemical properties, an increase in humus content, optimization of nitrogen, phosphorus, and potassium regimes, and the formation of a balanced or positive humus balance. A model for the sustainable functioning of agrocenoses in the Steppe zone was theoretically substantiated, providing for a rational combination of crop rotations, the use of crop residues, and environmentally safe fertilization systems. Implementation of the model ensures a zero or positive humus balance, mitigation of soil degradation processes, and increased crop rotation productivity. In grain–row crop rotations, the humus balance deficit is compensated through the incorporation of non-marketable residues of stubble crops and sunflower, whereas in grain–grass rotations a positive humus balance is formed (+0,24–0,25 t/ha). Arable land productivity reaches 4,03–4,50 t of grain units per hectare, with yield increases ranging from 0,50 to 1,49 t/ha depending on the fertilization system. The content of toxic elements in soil and crop products complies with regulatory standards. The economic effect is characterized by profits of 6,830–20,610 UAH and a profitability level of 26–59%. Product Description popup.authors Volodymyr I. Chaban Oksana Y. Podobed Nataliia V. Shvets Denys V. Bershov popup.nrat_date 2025-12-22 Close