Occurrence of Ulmus L. in the different forest site conditions of eastern Ukraine

Abstract

The “Ukrderzhlisproekt” Ukrainian State Forest Management Planning Association Database by 2017 was analysed for Donetsk, Kharkiv and Sumy Regional Forest and Hunting Management Administrations (RFHMA) to recognize the distribution of forest-covered area, area with Ulmus sp. as a main forest-forming species, and area of subcompartments with Ulmus sp. in the stand composition by forest site condition (FSC) types. Forests of Donetsk, Kharkiv and Sumy RFHMA are located in 16, 17 and 16 FSC types, with Ulmus sp. in 14, 13 and 11 FSC types, and with Ulmus sp. as the main forest-forming species in 11, 9 and 8 FSC types, respectively. U. minor is the most common; U. glabra is the least common. U. pumila dominates in Donetsk RFHMA and is absent in Sumy RFHMA. U. laevis is most common in Kharkiv RFHMA. U. minor prefers fresh and dry fertile FSC. U. laevis in Donetsk RFHMA prefers dry and fresh fertile FSC types, in Kharkiv RFHMA fresh fertile FSC types, in Sumy RFHMA fresh relatively poor, relatively fertile and fertile FSC types. U. pumila In Donetsk RFHMA prefers dry relatively fertile FSC, in Kharkiv RFHMA fresh fertile FSC, in Sumy RFHMA fresh relatively poor FSC, fresh relatively fertile FSC and moist fresh relatively fertile FSC. U. glabra prevails in moist relatively fertile FSC types, and in Kharkiv RFHMA also widely spread in fresh fertile FSC types.

The age structure of Ulmus L. stands in the eastern regions of Ukraine

“…In the forest fund of Donetsk region, there are four elm species that are the main forest-forming species. U. minor prevails in te rms of area (Meshkova et al, 2021), and both U. minor and U. pumila dominate in terms of the number of subcompartments (Fig. 1).…”

“…Elm is not considered a very important tree species in Ukraine, and its damage by various natural and anthropogenic factors has been little studied (Шевченко, 1986, 1987; Скольський, 2009; Пузріна, Явний, 2020). In the eastern part of Ukraine, elm distribution by forest site conditions was studied in the forests of the Donetsk, Kharkiv, and Sumy Regional Forest and Hunting Management Administrations (RFHMA) (Meshkova, Kuznetsova, Khimenko, 2021). It was conclud ed that U. minor is the most common, and U. glabra is the least common in the region.…”

“…Four elm species were analyzed (Meshkova et al, 2021): U. minor Mill. (fi eld elm) -in Ukrainian "berest"; U. laevis Pall.…”

“…As of 2017, the area of stands with U. minor, as the main species, is only 309.3 ha in Sumy region, while in Donetsk and Kharkiv regions, it is 477.3 and 504.9 ha, respectively (Meshkova et al, 2021).…”

“…1900 1910 1920 1930 1940 1950 1960 1970 1980 1990 The areas with U. laevis as the main forest-forming species are much smaller than those with U. minor. In Kharkiv region, the stands with U. laevis as the main forest-forming species occupy an area of 111.6 ha, in Donetsk region -61.7 ha, and in Sumy region -12 ha (Meshkova et al, 2021). At the same time, the stands of U. laevis, planted or naturally grown in the 1970s, predominate in Donetsk region (35 %).…”