Influence of climate dynamics and liming on physicochemical soil properties and crop- rotation productivity of North-Western Polissya in Ukraine

Abstract

Two liming fertilizers for soil deacidifi cation in Polissya were investigated: dolomite and lime fl our, which were applied at the beginning of the 8-year crop rotation with medium fertilizer N112P82K105 between 2011 and 2019. The experiments were performed in a stationary fi eld trial by the Institute of Agriculture of Western Polissya of the National Academy of Agrarian Sciences of Ukraine on crop rotation of winter wheat, corn, barley and winter rape. The object of the research was Albic Retisol (Arenic, Aric) (WRB, 2014) in a stationary trial. Before starting the research, soil pHKCl was 4.3 and hydrolytic acidity (Hh) 2.80–2.97 cmol(+)·kg–1. Liming fertilizer doses were determined on the basis of soil hydrolitic acidity (Hh) for dolomite fl our: 0.5 Hh – Dd0.5 2.230 t∙ha–1; 1 Hh – Dd1.0 4,740 t∙ha–1; 1.5 Hh – Dd1,5 6,700 t∙ha–1 and lime fl our: 1 Hh – Dl1.0 4,940 t∙ha–1. Application of dolomite fl our at a dose of Dd1.5 6,700 t∙ha–1 proved to be the most effective. It neutralised the acidity of the soil to the highest level pHKCl (6.64) and maintained in this case pHKCl 6.04 until the end of the 8-year of crop rotation. 3D modeling showed that the effectiveness of soil deacidifi cation by dolomite fl our increases with moderate simultaneous climate warming and humidifi cation.