WEED VEGETATION OF FOREST AND FOREST-STEPPE ZONES OF SOUTH URAL
Segetal or weed communities of South Ural differ in a high variety. It is bound both to variety of soil climatic conditions in the region, and to variety of the sowed cultures and ways of agriculture. Authors set the object to reveal a diversity of weed communities of a forest and northern part forest-steppe zones and to define their location in the system of weed vegetation of South Ural. The dataset includes 118 reléves of weed communities. According to result of syntaxonomical analysis, the diversity of researched territory weed vegetation is presented by one association, two subassociations, and three variants. The allocated subassociations presents geographical differentiation of communities of association, variants – differentiation on a crop. The feature of floristic composition of the studied communities consists in presence of a large number of apophyte species of meadows and forest edges vegetation. DCA-ordination results showed that the association has the most mezophytic floristic composition in comparison with other communities of weed vegetation of South Ural.