TRANSFORMATION OF THE STEPPE MEADOW WITH THE TRIFOLIUM MEDIUM (FABACEAE) SOWING IN THE RIVER-OB FOREST-STEPPE AREA
E.V. Bogolyubova
Siberian Federal Scientific Centre of Agro-Bio Technologies of the RAS, 630501, Krasnoobsk, Novosibirsk region
elenabogolyubova@yandex.ru
Keywords: Trifolium medium, Fabaceae, подсев, остепненный луг, видовой состав, урожайность, Trifolium medium, Fabaceae, seeding, steppe meadow, species composition, productivity
Abstract
The long-term observation data on the species composition and productivity changes in the herb-bluegrass steppe meadow under Trifolium medium strip sowing are presented. This species was introduced into the forest-steppe of Western Siberia by Central Siberian Botanical Garden of the SB RAS. It is shown that after intrusion into the natural community, T. medium exhibits a high degree of adaptation, successfully competing with representatives of the phytocenosis. A positive eff ect of T. medium on the main dominant of the grass stand, Poa angustifolia , and a negative effect on the species of herbs, including those dominating in the natural community, as Filipendula vulgaris and Fragaria viridis , were noted. With intensive shoot formation of T. medium , mainly due to rhizomes, their total number grows up to the 7th year of life and is maintained at a high level (450-850 pcs/m2) more than 9 years with fluctuations over years. Due to T. medium participation the total productivity of the grass stand increased by 1.5-2.5 times.
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