INFLUENCE OF MINERAL AND ORGANIC FERTILIZERS
 ON THE CHEMICAL AND AGROCHEMICAL PROPERTIES
 OF THE DEVELOPED LOWLAND PEAT DEPOSIT UNDER THE PLANTATION
 OF VIRGINAL PLANTS OF HIGHBUSH BLUEBERRY

Abstract

The article deals with the results of a biennial (2017–2018) comparative study of physico-chemical and agrochemical properties of the residual layer of a peat deposit under the plantation of two-year virginal plants of model Vaccinium corymbosum varieties (Northcountry, Bluecrop and Northland) on a recultivated developed lowland peat deposit under introduction of complete mineral fertilizer (‘Rastvorin’ brand ‘B’, N16P16K16), microfertilizer (Nanoplant-8, including eight trace elements: Co, Mn, Cu, Fe, Zn, Cr, Mo and Se) and organic fertilizers (Ekosil and Gidrogumat).
 In all variants of the experiment in both years of observations during the growing season in the root-inhabited layer, an increase relative to the initial level of the content of hydrolysable nitrogen and exchange potassium was found against the background of a decrease in the content of mobile phosphorus. In the first season, a slight increase in the level of hydrolytic acidity was registered, while the amount of absorbed bases decreased against the background of opposite changes in these indicators in the second season. In the first year of application of fertilizers by the end of the season, a significant enrichment of the substrate with mainly nitrate form of nitrogen and exchange potassium was established, with no noticeable changes in the content of mobile phosphorus. In the second year of application of fertilizers, there was a replenishment of ammonium nitrogen reserves with a predominant depletion of nitrate nitrogen, mobile phosphorus and exchange potassium (the greatest with Nanoplant and organic fertilizers treatment), which is due to the most intensive expenditure on the formation of the aboveground phytomass of experimental plants.