Abstract
The purpose. To study influence of fermentation activity of oxide-reductases of typical chernozem on content and hydrophobic-and-hydrophilic properties of humic acids (HA) at different techniques of soil cultivation. Methods. Field, laboratory-analytical, spectrometric. Results. Increase of polyphenoloxidase activity for 10-years use of zero cultivation promotes heightening of hydrophoby of HA due to formation of big quantity of condensed non-polar aromatic structures. After ploughing occurs re-organization of conformation of macrostructure of HA, which is caused by formation of more polar hydrophilous structures of HA in view of changing oxide-reductase activity, that in its turn causes greater moving ability of humus in comparison with zero cultivation and layland. Conclusions. Use of zero cultivation promotes reverse re-organization of functional macrostructure of HA due to change of oxide-reductase activity aside formation of hydrophobic structures – non-polar aromatic compounds.
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