FALLOW LANDS TRANSITION EFFECT ON ENZYMATIC ACTIVITY OF CENTRAL SIBERIA SOILS
The purpose of research is to study the enzymatic activity of soils in the process of their transition from agrocenoses to fallow lands. The study was carried out within three landscape zones of Central Siberia: on the land-use territory of Zarechenskoye LLP in the Tyukhtet District of the Krasnoyarsk Region (56°32' N and 89°18' E). The object of the study is soddy-deep podzolic soil, superficially slightly gleyy, light loamy; at the field station of the UNPK "Borskiy" (56°26' N and 92°54' E). The object of research is soil leached chernozem medium thick medium humus heavy loamy; in the zone of dry steppes of the Minusinsk depression of the Ust-Abakan District (53°77' N and 91°30' E). The object of research is the dark chestnut calcareous thin sandy loam soil. The parameters of the enzymatic activity of soils in agrocenoses, as well as the process of their transition to fallow, are considered. Low values of the activity of enzymes catalase and invertase in sod-podzolic soil, regardless of the nature of use are revealed. By the end of the growing season, the catalytic activity on the soddy-podzolic soil decreased, and the use of green manure promoted the hydrolysis of carbohydrates at the level of soil activity in the fallow area. In the leached chernozem by the end of the growing seasons on agrocenoses, the catalytic activity is significantly higher in the area of the fallow. The level of catalase activity was estimated as an average level in comparison with sod-podzolic soil. On the dark chestnut soil under fallow and green manure conditions, the catalytic activity was characterized by a statistically equivalent level. The use of rapeseed as a green manure on dark chestnut soil significantly increases its invertase activity.