Аналіз спонтанної флори плоских зелених дахів екстенсивного типу у місті Львові

Autor: M. I. Soroka, O. Ye. Halevych
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Науковий вісник НЛТУ України, Vol 30, Iss 5, Pp 20-24 (2020)
ISSN: 2519-2477
1994-7836
Popis: In the city of Lviv, there are 18 researched objects with green flat roofs of extensive type situated on the different heights and different building types. In the course of research some modern methods and technologies of creating green roofs are analysed and the basic directions of exploration in this branch are highlighted. The basic principles of classification and typification of green roofs are considered. An inventory of the species composition of cultivated and spontaneous plant species was made. The groups of green roofs were singled out according to the used species of the dominant biomorph. They were devided into the following types: with a predominance of succulents; lawn roofs; with the participation of essential plants of the Mediterranean flora; with the use of woody plants. For the first time in works of this type the spontaneous cenoflora which accompanies cultural phytocenoses of green roofs is investigated. It is established that the type of landscaping significantly affects the formation of the phytocenosis and determines the main directions of agricultural techniques for the maintenance of extensive roof plantations. It was revealed that there was a close dependence between the type of roof landscaping and the kind of variety of spontaneous plants. Some ways of spreading diasporas of listed species are also defined. The floristic analysis of the spontaneous cenoflora of flat green roofs showed that it consisted of 59 species, more of them are ruderal weeds, which originate from the syntaxonomic class Molinio-Arrhenatheretea. The second largest group consists of segetal weeds which originate from the class Stellarietea Mediae. It evidences about a high agricultural techniques of keeping plant compositions on the roofs, where spontaneous species of the first stage of overgrowth of the processed prevail. There were taproot polycarpic anemochoric hemicryptophytes between the identified species of weeds, that characterizes the method of their inclusion in plant compositions. The majority of the studied species were not planted with the substrate, but later they settled due to diaspora by wind. The numerical groups consist of species-barochors and anthropochors, which are setteled in the process of agricultural work. Although listed plant species make negative influence on the artistic and aesthetic, decorative and ecological function of roof landscaping. For the first time, the effectiveness and feasibility of the proposed research in this destination was proved. It was necessary to improve agrotechnical methods in order to maintain the species composition of plant compositions and to implement effective environmentally safe measures for preventing weeding of plant compositions of green roofs.
Databáze: OpenAIRE
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