No abstract

In the conditions of the Central Black Earth region, in the park plantations of the city of Voronezh, the categories of tree conditions and seed productivity of the genus Pseudotsuga Carr were compared. Estimated yield, linear parameters of cones and seeds. The average values and the amplitude of the variability of the morphometric parameters of cones and seeds are determined. It was shown that in urban conditions at different objects the variability of attributes increases and the category of condition worsens for trees that grow in close proximity to roads, and are also in a depressed state due to shadowing by neighboring trees. The possibility of phenotypic selection of trees for stability in an urban environment by the level of variability of the parameters of the generative sphere is considered. It was revealed that variability at the level of cultivated phytocenoses is weakly expressed than that of individual trees at the endogenous level. In this regard, selection requires a more in-depth study of the polymorphism of cones and seeds to identify correlative traits associated with tree productivity indices.

The article analyzes the diversity of tree species in different natural zones of the Saratov region. The main species composition of natural and artificial plantings is revealed, the importance of forests of the Saratov region is estimated. Recommendations for expanding the species composition in urban landscaping are proposed.