Abstract
The article presents the results of a study of the lerh wormwood–wheatgrass community (Artemisia lerchiana, Agropyron sibiricum), which grows on poorly washed heavy loamy dark brown soils. The floral composition and dynamics of organic matter reserves of the studied community are described. The research work was carried out according to the methodology of L.E.Rodin, N.I.Bazilevich, N.P.Remezov. Morphological features, the content of organic matter and the chemical composition of the soil of the plant community have been studied. There are 29 species in the flora of the lerh wormwood–wheatgrass community (Artemisia lerchiana, Agropyron sibiricum). The projective coverage is 50-60%, and the true coverage is 40-45%. The plant community under the influence of environmental factors undergoes transformation, which is expressed in a decrease in species diversity, a decrease in biological productivity, a change in the cycle of chemical elements and the replacement of valuable forage species with weeds. The conducted research has practical benefits and can be used in assessing the productivity of pastures, assessing the current state of vegetation and soil cover, determining the level of anthropogenic influence and in organizing work to preserve the biological diversity of plant communities.