Selection assessment of poplar varieties

The paper presents arguments about the increasing role and importance of the scientific approach  in modern landscaping, the importance of expanding the range of fast-growing breeds in complex urban planning  conditions.

A selection assessment in the collection of varietal poplar trees in the Arboretum of the Siberian State University named after M. F. Reshetnev was carried out. The arboretum populetum is represented to a greater extent by EuroAmerican black poplar hybrids, subdivided into male and female varieties. These are Euro-American hybrids that are promising for protective, industrial, forestry and landscaping purposes according to available research. Male varieties lead in three biometric indicators out of five (height, crown height, crown length), in terms of the projection diameter of the crown and trunk diameter they are practically not inferior to female varieties. A mass selection of varieties by growth rate was carried out. It was revealed that trees of Serotina variety are characterized by a higher height,  the largest trunk diameter was noted in poplars of Regeneratа variety. The larger diameter of the crown projection  was noted in the poplar of the Regeneratа variety; in terms of the height of the beginning of the crown and the length  of the crown, the Serotinа variety prevails. Individual selection of poplar specimens based on biometric indicators was carried out.

Most specimens of populetum are trees of I and II class height, class III height is singular; the predominant form of the crown is “narrow”, most specimens are characterized by a crown extent class of “long”. Four categories of viability were identified. Most specimens of poplar varieties are characterized by category “2” (weakened), the only variety with observed category of viability “1” (healthy) is Robusta.

The longest growing season was recorded in the poplars of Robustа and Moniliferа varieties (181 and 189 days, respectively). Varieties characterized by early and late beginning and end of vegetation have been established.

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