Oribatidas as bioindicators at monitoring the state of little used agricultural lands in Voronezh oblast

Numerosity of oribatidas in idle lands of Voronezh oblast is studied. It is noted, that the maximal parameter of ticks population density is characteristic for soils of northern part of oblast. In the south of oblast this parameter noticeably below. Character of change the ticks numerosity on idle lands of various age stages is revealed. Oribatidas population density gradually increases in the first (age of long fallow - 2-3 years) and the second (6-7 years) stages of idle lands restoration, but decreases in the third stage (10- 11 years). In the fourth stage on long fallows of meadow steppes oribatidas population density noticeably increases, on long fallows of gramineous steppes it decreases a little or remains at the previous level. The seasonal dynamics of oribatidas numerosity in idle lands is researched. It is found out, that on the general character dynamics of oribatidas numerosity on long fallows of forest-steppe zone in Voronezh oblast gravitates to parameters of the central Russia, and steppe zone - to northern regions of Ukraine. Data obtained during research show the general character of soils state as depending on geographical arrangement, types of soils, age, and from degree of anthropogenic load.