Dynamics of phosphorus reserves in the soil due to intensive use of arable land
M.S. Sidakova, E.M. Egorova, R.A. Tiev, A.Yu. Kishev
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Abstract: The article presents the results of research on one of the most pressing problems – the study of the dynamics of phosphorus reserves in the soil under conditions of intensive use of arable land, including the main factors influencing the change in phosphorus content, including agrotechnical practices, fertilization, soil erosion and biological activity. The purpose of the study is to determine the dynamics of phosphorus reserves in the soil due to intensive use of arable land. The scientific novelty lies in the fact that special attention is paid to the effects of long-term agriculture on phosphorus balance and soil fertility. The experiments, observations and records were carried out according to the methodology adopted in agronomy. As a result of research, it is important to note that the phosphorus content for this period under alfalfa corresponds to the content of P2O5 under annual crop crops. In a 10–40 cm soil layer, the phosphorus content turns out to be almost equal under all crops and black steam, but 23–12% less than in a field undergoing semi-steam treatment. In the 40–100 cm soil layer, the P2O5 content is leveled under alfalfa, black fallow, and chilly and is 14–28% less than in crop crops of annual crops, i.e. the opposite pattern is observed compared to the overlying soil layers, which is due to the redistributing role of the root system and the decomposition of crop and root residues. And according to the dynamics of P2O, depending on the method of using arable land and its precursors under the rye mixture, it can be said that the powerfully developed alfalfa root system increases the mobility of phosphates. During the analyzed period, only the alfalfa root system in the 40–100 cm soil layer supports phosphorus activity. In fields unoccupied by plants, phosphorus binds to sedentary forms. A similar pattern is typical for the entire meter-high soil layer. According to the results of the conducted research, it can be said that phosphorus, which is part of the crop and root residues of crops previously growing in the field, is insured against possible transformations in the soil and, like contained in manure, is easily accessible by this time to a new generation of plants (winter – basic and intermediate, corn and Therefore, the retention of N, P2O5, K2O and other macro- and microelements from fertilizers and soil in the crop-root sediments of plants is a well-known phenomenon, but not yet actively used.
Keywords: phosphorus reserves, soil, arable land, accumulation dynamics, crop rotations, tillage, fertilizers, stubble crops
For citation. Sidakova M.S., Egorova E.M., Tiev R.A., Kishev A.Yu. Dynamics of phosphorus reserves in the soil due to intensive use of arable land. News of the Kabardino-Balkarian Scientific Center of RAS. 2025. Vol. 27. No. 2. Pp. 130–138. DOI: 10.35330/1991-6639-2025-27-2-130-138
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Information about the authors
Margarita S. Sidakova, Candidate of Agricultural Sciences, Associate Professor, Kabardino-Balkarian State Agricultural University named after V.M. Kokov;
360030, Russia, Nalchik, 1v Lenin avenue;
sidakova.53@mail.ru
Elena M. Egorova,Candidate of Agricultural Sciences, Associate Professor of the Department of Agronomy, Kabardino-Balkarian State Agricultural University named after V.M. Kokov;
360030, Russia, Nalchik, 1v Lenin avenue;
conf200606@inbox.ru, ORCID: https://orcid.org/0009-0002-9559-4608, SPIN-code: 1914-0691
Ruslan A. Tiev, Candidate of Biological Sciences, Associate Professor, Kabardino-Balkarian State Agricultural University named after V.M. Kokov;
360030, Russia, Nalchik, 1v Lenin avenue;
Alim Yu. Kishev, Candidate of Agricultural Sciences, Associate Professor, Acting Head of the Department of Agronomy, Kabardino-Balkarian State Agrarian University named after V.M. Kokov;
360030, Russia, Nalchik, 1v Lenin avenue;
a.kish@mail.ru, ORCID: https://orcid.org/0000-0003-2838-6876, SPIN-code: 2237-8388