Space-time unevenness of soil supply with mobile microelements

Goal. To determine the spatial and temporal variation of content mobile trace elements in arable layer zonal soils Left Bank Forest Steppe Ukraine. Methods. Field, soil monitoring, laboratory-analytical — for determination forms by method atomic absorption spectrometry with extraction ammonium acetate buffer solution pH 4.8, statistical. The research was conducted during 2018–2020 at 2 soil-agrochemical land ranges. cover one them consisted chornozems dark gray podzolized soils, other, typical their varieties. Each ranges divided into 24 plots, where twice a year (April–May, September–October) saline, organic carbon, moisture, Zn, Cu, Mn were determined. Results. During period, average saline parameters first range varied from 4.4 to 5.0, second 5.8 6.1. At range, Zn increased spring autumn 0.63 0.81 mg/kg, Cu 0.25 0.38, 20.0 27.5 mg/kg. Conversely, on content, decreased 0.79 0.52 0.35 0.16 did not change significantly. A very high level observed within each especially Cu. However, centers concentration or impoverishment mostly have stable location. distribution had significant negative correlation Mn, certain periods observation, also Zn. Conclusions. Mobile dynamics Steppe, which manifested an increase under acidic reaction environment decrease close neutral values. variability high, coefficients 25–71% 28–76 9–52% Mn. closest relationship between (correlation – 0.4––0.85) noted samples experimental «Novyi Korotych» periods.