Current Growth Conditions of Populus Diversifolia Schrenk and Populus Pruinosa Schrenk in the Syr-Darya Valley

In the context of urbanization of territories and theintensification of agriculture, the biological diversity of animals and plantsin their habitats is degrading. The purpose of the study is to determine theedaphic factors affecting the growth of Populus diversifolia Schrenk andPopulus pruinosa Schrenk, as well as anthropogenic factors affectingtheir conservation in the Syr-Darya valley (Kazakhstan). For identifying therange of edaphic growing conditions, the analysis of soil samples gathered indifferent phytocenoses with the dominance or participation of Turanga wascarried out. The following results were presented: Physical and chemicalanalyses of soil samples for the content of humus, mobile forms of easilyhydrolyzable nitrogen, phosphorus, and potassium; pH aqueous solution; type,and degree of salinization. Among the 6 sections studied, 4 belong toalluvial-meadow tugai salt marsh soils, 1-to meadow salt marshes, and 1-toalluvial-meadow strongly salt marsh soils. Populus diversifolia has beenfound to prefer mild (sandy) and fewer saline conditions than Populuspruinosa. Among the negative anthropogenic impacts on the Turanga groveswere: Regulation of the runoff of the Syr-Darya, felling of trees, fires, andgrazing. The identified cenoflora was represented by 103 species of highervascular plants. Among them, Chenopodiaceae (18), Asteraceae(18), and Brassicaceae (12) were leading. The indicative role of Turangawas based on its connection to the places of groundwater occurrence.