UDC 631.452+631.445.41+631.8
DOI 10.36461/NP.2025.75.3.007

CHANGES IN THE FERTILITY OF MEADOW-CHERNOZEM SOIL UNDER THE INFLUENCE OF THE SOIL IMPROVER “POCHVOULUCHITEL” AND FERTILIZERS
I.S. Semenov, postgraduate student; E.N. Kuzin, Doctor of Agricultural Sciences, Professor;
A.N. Arefyev, Doctor of Agricultural Sciences, Professor;
E.E. Kuzina, Candidate of Agricultural Sciences, Associate Professor
Penza State Agrarian University, Penza, Russia, tel. 8(412) 62-85-65, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

The aim of the research was to study the effect of various doses of the soil improver “Pochvouluchitel” and their combinations with mineral and organic fertilizers on the fertility of meadow-chernozem soil and the productivity of agricultural crops in the forest-steppe conditions of the Middle Volga region. Studies have shown that the use of the soil improver “Pochvouluchitel” and the recommended manure dose (8 t/ha of dry matter) provided enhanced reproduction of humus in the arable layer of meadow-chernozem soil. The humus content in the arable layer increased by 0.14-0.22% compared to the control in the winter wheat agrocenosis and by 0.22-0.29% in the corn agrocenosis. The most significant positive effect on the restoration of the water-resistant macrostructure of the soil was provided by the joint application of the soil improver “Pochvouluchitel” at the rates of 750 and 1000 l/ha with cattle manure. The content of water-resistant aggregates varied from 59.3 to 60.5% at the end of the research (2024). The increase in relation to the control variant was significant and amounted to 26.6-27.8%. The structural condition of these variants was assessed as good. The use of the soil improver “Pochvouluchitel” together with cattle manure had the highest effect on reduction of hydrolytic acidity. The concentration of hydrogen ions in the soil absorbing complex in these variants was lower than the initial value in 2024 by 0.10-0.20 mg-eq/100 g of soil. The deviation from the control variant was significant and ranged from 0.11 to 0.22 mg-eq/100 g of soil. The maximum total crop productivity of the crop rotation link was marked while using of the soil improver “Pochvouluchitel” at the rate of 750 and 1000 l/ha in combination with manure and complete mineral fertilizer.
Keywords: meadow-chernozem soil, soil improver “Pochvouluchitel”, fertilizer, humus, water-resistant aggregates, hydrolytic acidity, plant productivity.

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