Humus and humic acids in chernozems of the southeastern Transbaikal region (Chita Oblast) |
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Authors: | G. D. Chimitdorzhieva D. B. Ayurova D. B. Andreeva |
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Affiliation: | (1) Institute of General and Experimental Biology, Siberian Branch, Russian Academy of Sciences, ul. Sakhyanovoi 6, Ulan-Ude, 670047, Russia;(2) Faculty of Biology and Geography, Buryat State University, ul. Smolina 24A, Ulan-Ude, 670000, Russia |
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Abstract: | Humic acids (HAs) in the noncalcareous chernozems developed from the colluvium of argillites and chlorite schist are characterized by a predominance of the first, relatively mobile fraction (HA-1) and a lower content of the second (HA-2) fraction. Modern nondestructive physicochemical methods for studying the chemical structure of HA macromolecules have shown that the Has in the virgin soils have approximately equal portions of aromatic and aliphatic groups. In the plowed soils, the portion of aromatic carbon increases under the impact of the intensive agricultural use of these soils and their susceptibility to wind erosion. |
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