Specificity of determination of paedogenic organic substances in soils of man-caused landscapes of Kuzbass.

It is known that transformation of organic substances to humus in soils is caused by Red-Ox processes development. In case of natural soils as a result of these processes incoming organic matter has biogenic nature, but in soils of man-caused landscapes to compounds of lithogenic origin add to these substances. Later lithogenic and biogenic substances conversion in the result of Red-Ox processes proceeds by two ways. The first is paedogenic transformation or humification by which humus compounds are produced. The second is chemical oxidation or chemogenic transformation in results of which humus matter is not forming, but organic substances like humus are able to be generated.Component composition of humus formed in such conditions has complicated structure which determines heterogeneity of its properties and functions. Therefore for understanding ecological and technological problems when revegetating disturbed soils it is necessary to know how to distinguish paedogenic (humus) and non-paedogenic organic substances.Soils formed on the burrows of Olgerass coal-pit located in mountain-taiga zone of Kuzbass were chosen as an object of research. In this time on surface of the burrow formed embryosems related, in accordance with classification of soils of man-caused landscapes, to initial, organo-accumulative, turf and humus-accumulative types. Samples of zonal sod-deep-podzol soils as well as coal particle and fresh capping rock were picked out and analyzed for comparison.A suggested method of definition of paedogenic organic matter content in soils of burrows of coal-pits allowed registering that decreasing of lithogenic organic substances amount and accumulating of paedogenic compounds or humus take place in embryosems. So, humus content in soils under consideration increased from 0,7% in upper lay of initial embryosem to 2,0% on such depth in humus-accumulative embryosem. As calculated humus content in the initial embryosem profile upper part corresponds to a similar one in lower horizons of zonal soils, it suggests that the result of chemical processes influence on initial substratum is involving lithogenic substances in forming systems. In turf and humus-accumulative embryosems humus profile is characterized by equal distribution with slight decrease in humus content in lower part of the profile. Such pattern indicates that forming humus substance systems on this stage of evolution function as similar systems in climacteric soils.Thus, emphasizing most important features of organic matter of soils of man-caused landscapes, it is needed to distinguish the following: embryosems formation is accompanied by accumulation of paedogenic and biogenic organic substances and lithogenic substances decreasing in soil profiles; rate and nature of paedogenic organic matter accumulation are syngenetic to stages of soil-arising; paedogenic organic substances formation proceeds both by humification of biogenic compounds and chemical conversion of lithogenesis products.

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