Keywords
decorative forms
introduction test
botanical garden
Kherson
How to Cite
Abstract
Objective — to evaluate the viability and decorativeness of introduced forms and hybrids of Berberis thunbergii DC. in collections and expositions of Kherson State University.
Materials and methods. The object of our study is decorative forms and hybrids of B. thunbergii and their viability in introduction collections and expositions founded in 2002–2005 in Botanical Garden of Kherson State University. We used traditional criteria for evaluating the viability and vital state of plants.
Results. We identified the cultivars of B. thunbergii in collections and expositions of Kherson State University, studied their biometrical characteristics, drought resistance and winter hardiness, viability and decorativeness under the conditions of southern arid steppe of Ukraine. The studied cultivars differ in their shape, habit of bushes, size of one-year shoots, leaf colouring, seed production, seed-renewing ability, and drought resistance. The maximal height of bushes reaches 230 cm (B. × ottawensis ‘Auricoma’), and the minimal one is 68 cm (B. thunbergii ‘Bananza Gold’) and 50 cm (B. thunbergii ‘Bagatelle’); the latter has also the smallest diameter of bushes —75–80 cm. The largest diameter of bushes (up to 300 cm) was found for two cultivars: B. × ottawensis ‘Superba’ and B. thunbergii ‘Red Roсket’. The length of one-year shoots strongly varies within a single bush, the biggest rate can reach 145 cm, the least – 1 cm. The studied cultivars essentially differ in number of renewing shoots (turions), which can reach up to 170 cm. We highlighted the six most promising forms, three interspecific hybrids, and one dwarf form for further using them in garden and park landscaping in Southern Ukraine.
Conclusion. Among 21 decorative cultivars of B. thunbergii, which were tested in conditions of Botanical Garden of Kherson State University, we highlighted the most promising ones for further using them in garden and park landscaping, namely ‘Green Carpet’, ‘Minor’, ‘Atropurpurea’, ‘Golden Ring’, ‘Red Roсket’, ‘Bagatelle’, interspecific hybrids B. × ottawensis ‘Superba’, ‘Pluriflora’, ‘Auricoma’.
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