INTERACTION OF CAICAREOUS FERTILIZERS WITH ORGANIC MATTER OF PEAT SOILS

Abstract

The increase of the decomposition degree of peat take place if calcareous fertilizers have been used on the weakly decomposed peat soils, but decomposition degree is not changing by introduction of calcareous fertilizers into soils developing on the middle or highly decomposed peat. The content of total nitrogen, humic and fulvic acids is increasing, but С:N ratio, the quantity of the light- and heavy hydrolysable substances are decreasing in soils developing on a weakly decomposed peat. The elemental and group composition of organic matter are not changing if calcareous fertilizers have been used on the soils developing on the middle and highly decomposed peat. At entering of calcareous fertilizers into peat soils calcium and magnesium cations interact with the carboxyl groups located at aromatic nucleus belonging to different molecules of humic acids. The new organic-mineral components with the increased electronic paramagnetism are forming into peat soils as a result of such interaction.