Agriculture and forestry

Matusiak Mikhailo Vasylovych – PhD of Agricultural Sciences, associate professor of the Department of Forestry, Landscape Gardening, Horticulture and Viticulture of Vinnytsia National Agrarian University (21008, Vinnytsya, 3 Sonyachna Street. e-mail: mikhailo1988@gmail.com).

Kozak Yuriy Volodymyrovych – assistant of the Department of Forestry, Landscape Gardening, Horticulture and Viticulture of Vinnytsia National Agrarian University (21008, Vinnytsya, 3 Sonyachna Street. e-mail: kozakyuv@gmail.com).

After analyzing data from the literature sources, it was found that R. viscosa, which ranks second after R. pseudoacacia in terms of the introduction process involvement, is characterized by less winter hardiness. According to Kachalov A.A. [10], R. viscosa proved its winter-hardiness in conditions of the east, northern and middle parts of Ukraine and Transcarpathia. In Vinnytsia conditions, it withstands frosts up to -30˚С. In Moldova (Chisinau R. pseudoacacia tolerates winter well and bears fruit. As a result of the research, it was established that winter hardiness of the genus Robinia L. species in conditions of introduction was 1-2 (3) points. The introduced genus Robinia L. species and forms, which were objects of the research, in conditions of Vinnytsia were able to withstand negative temperatures (up to -32˚C) without significant damage. According to the obtained data, it was established that the genus Robinia L. representatives belong to the drought-resistant species and are able to withstand a long period of dry and rainless weather. The level of drought resistance of the studied species and forms according to the Pyatnytskyi S.S. scale equals to 4-5 points. According to the Pyatnytskyi S.S. light-demanding scale, R. pseudoacacia belongs to the most photophilous tree species – heliophytes. It was also defined that such species as R. pseudoacacia, R. holdtii, R. ambigua are fully acclimatized, R. viscosa, R. luxurians are well acclimatized. Their acclimatization numbers are: R. pseudoacacia = 100, R. viscosa = 86, R. luxurians = 86, R. holdtii = 95, R. ambigua = 94. Having analyzed the studied species in terms of their decorative characteristics, it was found that the time of decorativeness in the genus Robinia L. species is divided into two periods: the first is the flowering one, and the second – the time of leaf pigmentation change. According to our observations, the studied representatives received 5 points of decorativeness according to the Kalinichenko O.A. method in the following time periods: 1) from 05.15.2022 to 06.15.2022 – the time of flowering; 2) from 18.08.2022 to 20.09.2022 – leaf colour change.

1.Kalinichenko O.A. (2003) Dekorativna dendrologiya: navchalniy posibnik[Decorative dendrology: a textbook]. K.: Vischa shkola. 199. [in Ukrainian].

2.Kokhno M.A., Kuznietsov S.I. (2005) Metodychni rekomendatsii shchododoboru derev ta kushchiv dlia introduktsii v Ukraini [Methodical recommendations for the selection of trees and shrubs for introduction in Ukraine]. К. 48. [in Ukrainian].

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4.Mazurenko V. D. (2005). Morfolohichni osoblyvosti vydiv rodu Robinia L.[Morphological features of species of the genus Robinia L.]. Materialy mizhnar. nauk. konf. «Lis, nauka, suspilstvo» – Materials of international of science conf. «Forest, science, society». Kharkiv. 120. [in Ukrainian].

5. Mazurenko V.D. (2007). Osoblyvosti fenolohichnykh faz rozvytku vydiv Robinia pseudoacacia L. ta Robinia viscosa Vent. v umovakh introduktsii [Peculiarities of the phenological phases of development of Robinia pseudoacacia L. and Robinia viscosa Vent species. in terms of introduction]. Naukovi zapysky Ternopilskoho nats. ped. un-tu im. V. Hnatiuka – Scientific notes of the Ternopil National ped. University named after V. Hnatyuk. №3 (33). 49-52. [in Ukrainian].

6.Mazurenko V.D. (2005). Rid Robinia L. ta problemy formuvannia optymalnoho landshaftu [The genus Robinia L. and the problems of forming an optimal landscape]. Problemy zberezhennia, vidnovlennia ta zbahachennia bioriznomanitnosti v umovakh antropohenno zminenoho seredovyshcha: materialy mizhnar. nauk. konf. Kryvyi Rih. 240-241. [in Ukrainian].

7. Mazurenko V. D., Babii L. O. (2006). Nasinnieva produktyvnist vydiv Robinia pseudoacacia L. ta Gleditschia triacantos L. v umovakh Lisostepu Ukrainy [Seed productivity of the species Robinia pseudoacacia L. and Gleditschia triacantos L. in the conditions of the forest-steppe of Ukraine]. Materialy II mizhnar. nauk. konf. stud. ta aspir. «Molod i postup biolohii». Lviv. 101-102. [in Ukrainian].

8. Matusiak M.V. (2020). Osoblyvosti rostu ta rozvytku vydiv rodu Forsythia Vahl. v umovakh biostatsionaru VNAU [Peculiarities of growth and development of species of the genus Forsythia Vahl. in the conditions of the VNAU biostationary]. Vykorystannia innovatsiinykh tekhnolohii v ahronomii: «Mizhnarodna naukovo-praktychna konferentsiia. Vinnytsia. [in Ukrainian].

9. Matusiak M.V. (2020). Otsinka zymostiikosti vydiv rodu Magnolia L. v umovakh biostatsionaru Vinnytskoho natsionalnoho ahrarnoho universytetu [Assessment of winter hardiness of species of the genus Magnolia L. in the conditions of the Vinnytsia National Agrarian University biostation]. Visnyk ZhNAEU. Naukovi horyzonty – Bulletin of ZhNAEU. Scientific horizons. № 03 (88). 74-80 [in Ukrainian].

10. Piatnytskyi S.S. (1960). Kurs dendrolohii [Dendrology course]. Kh.: Vyd-vo Kharkivskoho u-tu,. 423. [in Ukrainian].

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13. Huntley J.C. Robinia pseudoacacia L. Black Locust. URL: www.na. fs.fed.us/spfo/pubs/silvics_manual/Volume_2/robinia pseudoacacia.htm [in English].