Singenesys of vegetation cover and redox systems forming in soils of burrows of coal-pits

Every year, up to three billion tons of solid waste are brought to the surface in the Kuznetsk Coal Basin. The majority of them consist of overburden and enclosing rocks extracted during coal mining. When on the surface, these substances start to undergo the process of oxidation, which is accompanied by the formation of new compounds capable of accumulating or migrating and, thus, complicating the environmental situation in the adjacent landscapes. The soil redox systems are known to be capable of fixation and detoxication of the products of oxidation. For instance, in the process of the humus formation, phenolic substances can form polymers that are similar in their properties to humus acids. The entry of biogenic substances on surface and into substratum is the most important condition for transformation of initial lithogenic redox systems to paedogenic. The influence of vegetation as a factor determining both quantity and quality of incoming biogenic substances in different soils is irregular and depends on embriosems evolution stages. In reference to these facts the goal of research was to evaluate vegetative cover influence on redox system transformation processes in soils of man-caused landscapes of Kemerovo region. Soils formed on Olgerass coal-mine dumps, located in mountain-taiga zone of Kuzbass were taken as objects of research. Embriosems formed at this moment on surface of coal-mine dump refer to initial, organo-accumulative, turf and humus-accumulative types, in accordance with man-caused landscapes soil classification. The results of the research show that transformation of initial lithogenic redox systems to paedogenic depends on floral group composition. Meanwhile forming paedogenic redox systems proceed stepwise, in accordance with phytocenosis succession stages. It is ascertained that pioneer vegetation, typical of initial embriosems, does not provide enough quantity of biogenic substances entry. Chemogenic redox systems transformation processes are prevalent in such embriosems. Simple vegetation corresponded to organo-accumulative embriosems sustain activation of biologic processes. It expressed in accumulation of reduced biogenic substances on surface of the soil as turf horizon. Predominance of biogenic redox processes is attributable for such type of embriosems. Complex vegetation forming on turf embriosems support advance of paedogenic redox processes. It takes place under intra-soil influence of live organisms and their vital activity products on substratum. Self-contained phytocenosis, typical of humus-accumulative embriosems, sustain paedogenic accumulative redox processes. The evolution of these processes is accompanied by the forming ofpaedogenic reduced substances or humus accumulative horizon.

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