UDC 631.599:631.452:631.811.93:631.861
DOI 10.36461/NP.2023.68.4.005

FORMATION OF CROP YIELDS AND FERTILITY OF GRAY FOREST SOIL UNDER THE INFLUENCE OF DIATOMITE AND BIRD DROPPINGS
A.N. Arefiev¹, Doctor of Agricultural Sciences, Associate Professor; E.N. Kuzin¹, Doctor of Agricultural Sciences, Professor; O.N. Kukharev¹, Doctor of Technical Sciences, Professor; E.E. Kuzina¹, Candidate of Agricultural Sciences, Associate Professor; R.I. Dubin², Candidate of Agricultural Sciences
¹Federal State Educational Institution of Higher Education “Penza State Agrarian University”, Penza, Russia, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.;
²Federal State Educational Institution of Higher Education “Tatishchev Astrakhan State University”, Astrakhan, Russia

Taking into account the soil and climatic conditions of the forest-steppe of the Middle Volga Region, the effect and aftereffect of various norms of diatomite (siliceous agronomic ore) and its combinations with bird droppings on crop yields and effective fertility of gray forest soil have been scientifically substantiated and experimentally proven. In the experimental variants with the introduction of 10 t/ha of bird droppings and siliceous agronomic ore (diatomite) with norms from 4 to 10 t/ha mixed with bird droppings, the humus content in the arable layer of gray forest soil increased by 0.06-0.15% from the initial values during the research period. The most significant effect on the accumulation of nutrients in the arable layer of gray forest soil was the joint use of diatomite with bird droppings. The content of alkaline hydrolyzable nitrogen while using diatomite with bird droppings exceeded the control by 7.4-11.9 mg/kg of soil, mobile phosphorus – by 6.7-9.0 mg/kg of soil, mobile potassium – by 7.8-9.6 mg/kg of soil. A mathematical analysis of experimental data and the magnitude of the correlation coefficient was carried out, conclusions were drawn about the nature of the interaction of the studied values of fertility of the arable layer of gray forest soil.
Keywords: diatomite, bird droppings, humus, alkaline hydrolyzable nitrogen, mobile phosphorus, mobile potassium, gray forest soil, yield.

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