Home – Home – Jornals – Contemporary Problems of Ecology 2009 number 5

Influence of reservation rate on natural degraded pasture areas at different stages of pasture digression was studied during the years 1994-2004 under the conditions of the right-bank forest-steppe near the Ob river. It was revealed that the isolation of pasture phytocoenoses of a steppe meadow from pasturing causes an increase in the productivity of grass but due to different economic-botanical groups of plants. An increase in the productivity at the initial stage of digression occurs due to overgrowth of legumes and motley grass, while at the final stages mainly due to an increase in the mass of cereals. Removal of pasture load promotes the formation of intermediate communities; in this situation, an increase in their species diversity is to a high extent due to the presence of closely located phytocenoses which are richer from the floristic viewpoint.