UDC 631.412+631.445.4+631.822+631.867
DOI 10.36461/NP.2023.65.1.003
CHANGES IN THE ACID-BASE PROPERTIES OF LEACHED CHERNOZEM WHEN USING CHEMICAL AMELIORANTS AND POULTRY MANURE
N.S. Ochkina, post-graduate student, А.N. Arefiev, Doctor of Agricultural Sciences, Assistant-Professor, Е.N. Kuzin, Doctor of Agricultural Sciences, Professor, Е.Е. Kuzina, Candidate of Agricultural Sciences, Assistant-Professor
Federal 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.
The aim of the study was to investigate the effect of different rates of marl, dolomite flour and their com-binations with poultry manure on the acid-base properties of leached chernozem. To solve these problems in the first agro-soil district of Penza region we conducted field studies in the period from 2020 to 2022. The results showed that the use of marl and dolomite flour had an equal effect on the acid-base properties of leached cher-nozem, and the highest effect in this case was provided by the ameliorant rate equal to 1.5 Ng. The application of marl and dolomite meal at the rate of 1.5 Ng together with poultry manure had the most significant effect on the increase of cation exchange capacity, the sum of exchangeable bases, pHsalt value and decrease of hydrogen ions concentration in soil absorbing complex. Amount of cation exchange capacity when marl and dolomite meal were added together with poultry manure increased by 2.6-2.7 mg-eq./100 g, the amount of exchangeable bases - by 4.8-4.9 mg-eq./100 g, pHsalt - by 1.37-1.38 units, concentration of hydrogen ions in soil absorbing complex decreased by 2.20 mg-eq./100 g.
Keywords: leached chernozem, marl, dolomite flour, poultry manure, cation exchange capacity, total ex-changeable bases, acidity.
