Purpose. To evaluate hazelnut cultivars, species and hybrids from the genetic collection of Corylus spp. in the National Dendrological Park “Sofiyivka” of the NAS of Ukraine for the complex of economic characters. An attempt has been made to analyze the information on Corylus spp. identity, taxonomy and description, dissemination and ecological requirements of the species, possibilities to use the genetic potential for developing new cultivars. Methods. The value of the Corylus spp. collection representatives was investigated using conventional testing procedures. For summarizing information concerning phylogenetic reconstruction of the Corylus L. genus and hazelnut, a number of scientific publications to be proposed for discussion was analyzed. The oil content in hazelnut kernels and the fatty acid composition was determined using official methods. Results. The best samples of hazelnut genetic collection were included into the broad hybridization programme, and C. chinensis Franch. representatives as well. A number of hybrid seedlings was obtained including new hazelnut cultivars ‘Sofiyivsky 1’, ‘Sofiyivsky 2’ and ‘Sofiyivsky 15’ which were characterized by spherical or almost spherical fruits, high winter hardiness and drought resistance, as well as the absence of rhythmicity in fruiting. Conclusions. The collection of varieties, forms, cultivars and species of the Corylus L. genus created during the last years can be the base for hazelnut breeding in Ukraine.

Purpose. To study biological peculiarities of softwood cuttings of three species of ornamental garden plants of the Hydrangeaceae family introduced under the conditions of a botanical nursery of Uman National University of Horticulture, and the prospects of planting material use in landscaping. Methods. Field study, laboratory test, statistical and mathematical analysis. Results. Bioecological and ornamental peculiarities of grafters of investigated species and their preservation for supplying the store of initial plant graft material were studied. The dependence of regeneration ability of softwood cuttings of investigated varieties on preplant treatment by a biologically active substance (KANO), type of a shoot, time of grafting, etc was analyzed. Substantially intensive rooting of basal drafts with three nods and less intensive rooting of apical drafts was observed during the whole period of rooting. Conclusions. The treatment of softwood cuttings with a biologically active substance at the concentration of 10–15 mg/l in the aqueous solution stimulates root formation and activates growth of own root plants. Investigated plant species of Hydrangeaсeae family are promising for landscaping on urbanized areas of various functional use.

Мета. Проаналізувати таксономічне та сортове різноманіття колекції пряних рослин Сирецького дендрологічного парку загальнодержавного значення, оцінити їхні декоративні якості та визначити напрями використання в ландшафтному дизайні. Методи. Предмет дослідження – вирощувані на території Сирецького дендропарку пряні рослини, що є частиною колекції рослин відкритого ґрунту. Види та сорти цієї групи рослин інтродуковано в дендропарк у період з 1949-го по 2021 р. У процесі досліджень використовували методи аналізу та синтезу, порівняння й узагальнення інформаційних даних. Результати. Встановлено, що колекція пряних рослин Сирецького дендропарку налічує 69 таксономічних одиниць 33 родів, які об’єднують 12 родин. Серед них 52 види та 25 культиварів. Найбільше представників мають родини Lamia€ceae – 32 таксони, Amaryllidaceae – 11 таксонів та Asteraceae – 9 таксонів. Життєві форми пряних рослин представлені деревними (19 таксонів) та трав’яними рослинами (50 таксонів, з яких 10 є однорічниками, 2 – дворічниками, 38 – багаторічниками). Традиційні сфери застосування пряних рослин – харчова, лікарська (фармакологія) та парфумерна. Також їхні декоративні сорти і культивари використовують для створення ландшафтних композицій. Зокрема на території Сирецького дендропарку пряні рослини є композиційною основою тематичного «Саду пряно-ароматичних рослин», їх використовують як елементи класичних клумб і композицій літників, тематичних композицій (національні й аптекарські сади, декоративні городи), альпійських гірок і рокаріїв тощо.Висновки. Багаторічний досвід озеленення та створення квітникових композицій у Сирецькому дендрологічному парку свідчить, що пряні рослини є важливим елементом у всіх типах апробованих декоративних композицій. Встановлено, що із 69 таксонів пряних рослин, які ростуть у колекційних насадженнях Сирецького дендропарку, 51 мають декоративні якості та використовуються як декоративно-квіткові й декоративно-листяні види. Таксономічне та сортове різноманіття пряних рослин має значний потенціал для селекційної роботи та створення високодекоративних ландшафтних композицій різного призначення. Завдяки розмаїттю життєвих форм та біоморфологічним особливостям пряні рослини доцільно використовувати в різних типах насаджень для декоративного садівництва та ландшафтного дизайну. | Purpose. To analyze the taxonomic and varietal diversity of the collection of spicy plants of the Syrets Arboretum, evaluate their decorative qualities and determine the directions of use in landscape design. Methods. The subject of the study is spicy plants grown on the territory of the Syrets Arboretum, which are a part of the collection of open ground plants. The species and varieties of this group of plants were introduced in the arboretum from 1949 to 2021. In the process of research, methods of analysis and synthesis, comparison and generalization of information were used. Results. It has been established that the collection of spicy plants of the Syrets Arboretum includes 69 taxa belonging to 33 gene­ra, 12 families.  There are 52 species and 25 cultivars among them. The largest number of representatives are in the families Lamiaˆceae – 32 taxa, Amaryllidaceae – 11 taxa and Aste­raceae – 9 taxa. The life forms of spicy plants are represented by woody (19 taxa) and herbal plants (50 taxa, of which 10 annual, 2 biennial, and 38 perennial forms). The traditional fields of application of spicy plants are food, medicine (pharmacology) and perfumery. In addition, their decorative varieties and cultivars are used to create landscape compositions. In particular, on the territory of the Syrets Arboretum, spicy plants are the compositional basis of the thematic “garden of spicy aromatic plants”, they are used as elements of classic flower beds and summer compositions, thematic compositions (national and pharmacy gardens, vegetable flower beds), alpine slides and rocky gardens, etc. Conclusions. Many years of experience in landscape design and creation of floral arrangements in the Syrets Arboretum showes that spicy plants are an important element in all types of tested decorative compositions. It is revealed that out of 69 spicy plants that grow on collectible plantings of the Sirets Arboretum, 51 have decorative qualities and are used as decorative-floral and decorative-deciduous species. The taxonomic and varietal variety of spicy plants has considerable potential for breeding work and creation of highly decorative landscape compositions of various purposes. Due to the availability of different life forms and biomorphological features, it is advi­sable to use spicy plants in different types of plantations for decorative gardening and landscape design.

Purpose. To study biological peculiarities of softwood cuttings of three species of ornamental garden plants of the Hydrangeaceae family introduced under the conditions of a botanical nursery of Uman National University of Horticulture, and the prospects of planting material use in landscaping. Methods. Field study, laboratory test, statistical and mathematical analysis. Results. Bioecological and ornamental peculiarities of grafters of investigated species and their preservation for supplying the store of initial plant graft material were studied. The dependence of regeneration ability of softwood cuttings of investigated varieties on preplant treatment by a biologically active substance (KANO), type of a shoot, time of grafting, etc was analyzed. Substantially intensive rooting of basal drafts with three nods and less intensive rooting of apical drafts was observed during the whole period of rooting. Conclusions. The treatment of softwood cuttings with a biologically active substance at the concentration of 10–15 mg/l in the aqueous solution stimulates root formation and activates growth of own root plants. Investigated plant species of Hydrangeaсeae family are promising for landscaping on urbanized areas of various functional use.

Purpose. To evaluate hazelnut cultivars, species and hybrids from the genetic collection of Corylus spp. in the National Dendrological Park “Sofiyivka” of the NAS of Ukraine for the complex of economic characters. An attempt has been made to analyze the information on Corylus spp. identity, taxonomy and description, dissemination and ecological requirements of the species, possibilities to use the genetic potential for developing new cultivars. Methods. The value of the Corylus spp. collection representatives was investigated using conventional testing procedures. For summarizing information concerning phylogenetic reconstruction of the Corylus L. genus and hazelnut, a number of scientific publications to be proposed for discussion was analyzed. The oil content in hazelnut kernels and the fatty acid composition was determined using official methods. Results. The best samples of hazelnut genetic collection were included into the broad hybridization programme, and C. chinensis Franch. representatives as well. A number of hybrid seedlings was obtained including new hazelnut cultivars ‘Sofiyivsky 1’, ‘Sofiyivsky 2’ and ‘Sofiyivsky 15’ which were characterized by spherical or almost spherical fruits, high winter hardiness and drought resistance, as well as the absence of rhythmicity in fruiting. Conclusions. The collection of varieties, forms, cultivars and species of the Corylus L. genus created during the last years can be the base for hazelnut breeding in Ukraine.