Fluctuation of quality and spectroscopic performances of organic matter of typical black earth at different systems of soil cultivation

Abstract

The purpose. To study influence of systems of soil cultivation of different intensity on quality and spectroscopic performances of organic matter of a surface layer of typical black earth. Methods. Field, laboratory-analytical, spectroscopic. From probed soil they extracted specimens of humic acids of 2-nd fraction. Results. Data are given concerning quantitative and quality parameters of organic matter of a surface layer (0-10 cm) of typical black earth at application of different systems of cultivation. It is determined that the content of general carbon and fraction of humic acids linked to calcium (HA-2) of organic matter decreases with increase of intensity of cultivation. The content of the most mobile fraction of humic acids (HA-1) and carbon of labile humus, on the contrary, increases. The most condensed aromatic structures of organic matter were organized after minimum and zero cultivation of typical black earth. Conclusions. Minimization of cultivation decreases loss of organic matter due to formation of stable ripe aromatic elements of humic acids.