UDC 631.8+631.452
DOI 10.36461/NP.2023.65.1.013
INFLUENCE OF LIME MATERIALS AND THEIR COMBINATION WITH POULTRY MANURE ON THE FERTILITY OF LEACHED CHERNOZEM
N.S. Ochkina1, Postgraduate Student; A.N. Arefiev1, Doctor of Agricultural Sciences, Associate Professor; E.N. Kuzin1, Doctor of Agricultural Sciences, Professor; E.E. Kuzina1, Candidate of Agricultural Sciences, Associate Professor; R.I. Dubin2, Candidate of Agricultural Sciences, Associate Professor
1Federal State Budgetary Educational Institution of Higher Education "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.;
2Federal State Budgetary Educational Institution of Higher Education "Astrakhan State University", Astrakhan. Russia
The purpose of the study was to investigate the effect of different amounts of chemical meliorants and their combinations with poultry manure on the fertility of leached chernozem. To achieve the set goal, field experiments were conducted in 2019-2022 at the Educational and Experimental Farm of Penza State Agrarian University. Studies have shown that the highest effect on humus accumulation, alkaline-hydrolyzable nitrogen, labile phosphorus and labile potassium in the arable layer of leached chernozem (medium-thick and medium-humic) was obtained by the complex application of marl and dolomite powder with poultry manure. At the end of the study, the humus content in the arable layer exceeded the initial values by 0.21-0.22%, alkaline-hydrolyz-able nitrogen by 28.4-28.5 mg/kg soil, labile phosphorus by 20.5-20.6 mg/kg soil, labile potassium by 21.5-21.6 mg/kg soil against the background of the after-effect of marl and dolomite powder in the amount of 1.0 Ng in complex with poultry manure in the amount of 30 t/ha. Application of chemical meliorants at 1.5 Ng in combi-nation with poultry manure increased humus content by 0.24-0.25%, alkaline-hydrolyzable nitrogen by 29.9-30.0 mg/kg soil, labile phosphorus by 23.4-23.8 mg/kg soil, and labile potassium by 24.9-25.0 mg/kg soil.
Keywords leached chernozem, marl, dolomite powder, poultry manure, humus, alkaline-hydrolyzable ni-trogen, labile phosphorus, labile potassium.
