Оrlov О. The ecological-power differentiation of edaphotops in the Upper Dniester Basin.

The objects are humics block of edaphotope of primary and secondary biogeocenoses, culture-biogeocenoses and technogenic ecosystems in the Upper Dniester Basin. The aims are find out influencing a quantitative and qualitative structure of an edaphic humus on power capacity of edaphotope and to study their differentiation on ecological-energy parameters. Methods - generally accepted techniques edaphic and biogeocenologys researches, variational statistics. The differential estimation of ecological-power condition of edaphotope of primary biogeocenoses in the Upper Dniester Basin has been done. The results of study prove a considerable difference in power parameters of edaphotops of natural biogeocenoses. Taking into account indices of power reserve and calorific capacity of organic matter, three types of ecological-power condition of edaphotops in native plant associations have been distinguished. Changes in power characteristics of soil humus under influence of forestry and agriculture have been investigated. Owing to the substitution of secondary forest biocenoses for primary ones, all edaphotops investigated are characterized by a slight reduce of their power capacity (to 25%), such losses being caused by changes of both quantitative and qualitative parameters of organic matter. Agricultural management of edaphotops leads to reduction of their power capacity more than 50%, these losses being mainly caused by decrease of amount of organic matter. As a result of our study, three types of digression of ecological-power condition of the regional soils have been distinguished. Some trends in optimization of ecological-power condition of anthropogenic edaphotops in the studied area have been suggested. Spheres of use are recovery of a functional condition of biogeocenoses, edaphic-ecological estimation, land-use system, rational specialization of grounds.