Oleksandr
@nubip.edu.ua
Education and Research Institute of Forestry and Landscape-Park Management
National University of Life and Evironmental Sciences of Ukraine
RESEARCH INTERESTS
Forestry, Agroforestry
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Nataliia Puzrina, Roman Vasylyshyn, Orest Obukhivskyi, Ivan Lakyda, Oleksandr Bala, Oleksandr Sovakov, Serhii Sendonin, and Oleksii Boiko
Wydawnictwo Naukowe Gabriel Borowski (WNGB)
Andrii Derii, Andrii Pinchuk, Oleksandr Babyn, Oleksandr Sovakov, and Artur Likhanov
Walter de Gruyter GmbH
Abstract Assessing the condition of plants in an urban landscaping is a necessary component of monitoring urban ecosystems. Studying how the sensitivity of plants to stressful conditions and the influence of many factors on their growth and development is important for determining the suitability of using plants for urban improvement. The purpose of this study was to identify the impact of stress factors on the growth and development of Ligustrum vulgare L. (commonly called privet). The research was conducted in the city of Kyiv, where the plants are affected by significant vehicle traffic, intense insolation or excessive shade, and mechanical traumatization of plants due to plant trimming. Shoots of Ligustrum vulgare L. of different ages and under different growing conditions were used for the analysis. The research used methods of morphometry, chromatographic profiling of secondary metabolites, and statistical data processing. To analyze the morphogenesis of annual shoots, the Gaussian model was used, which accurately (R2 > 0.90) describes their growth processes. The model coefficients were used for a comparative assessment of the growth dynamics of Ligustrum vulgare L. shoots depending on the growing conditions and plant care. Correlation analysis also allowed for the identification of potential connections between the growth model coefficients and certain phenolic synthesis products. It was found that the plant trimming leads to an increase in the length of the shoots and accelerated growth of the side shoots. The obtained results may indicate that phenolic compounds, in particular chlorogenic acid, directly or indirectly affect the regulation of growth and development of shoots of Ligustrum vulgare L. in response to stress factors, such as mechanical injury. The content of chlorogenic acid positively correlates with the increase in the length of internodes, which indicates its possible role in morphogenesis. It has been established that the profiles of phenolic substances allow identification of Ligustrum plants at the species level. Principal component analysis (PCA) and cluster analyses showed that the phenolic profiles of plants depend on their growing conditions and the urban environment. The study confirms the importance of plant trimming for stimulating plant growth. The significant adaptation potential of Ligustrum vulgare L. plants confirmed the suitability of their use in urban environments.
O Babyn, A Pinchuk, A Derii, O Boyko, and O Sovakov
IOP Publishing
Abstract The role of green spaces in the urban system is important for creating a comfortable environment for the urban population. Most native species in urban environments have low resistance to pathogens and pests, due to the constant exposure to stressful abiotic and anthropogenic factors. Therefore, the issue of expanding the range of ornamental plants resistant to high temperatures, low moisture levels and the ability to withstand low winter temperatures is becoming relevant. The aim of the study was to determine the relative drought and frost resistance of plants of the genus Cercis L. by laboratory methods. In particular, determining the potential for drought tolerance by determining the level of vegetation, water yield per unit time, the level of water deficit of leaf blades and heat resistance, as well as determining frost resistance by laboratory freezing of annual shoots of experimental plants. These studies show that frost resistance and drought tolerance are closely related. Plants that had less drought tolerance eventually had a higher score of frost damage to shoot tissue. In our opinion, this is due to the fact that these species are more moisture-loving and their tissues are saturated with more moisture. It was found that drought tolerance varies not only between species, but also between cultivars of Cercis L. Thus, C. canadensis ‘Vanilla Twist’ had a higher level of frost resistance than C. canadensis ‘Ruby Falls’, but lower than Cercis canadensis L.
Volodymyr Maliuha, Oleksandr Sovakov, and Sergii Dudarets
National University of Life and Environmental Sciences of Ukraine
The relevance of the study is related to the need to determine the current state of windbreaks as a component of the forest-agrarian landscape of a particular region. The purpose of the study is to conduct a comprehensive assessment of windbreaks. During the study, data from remote sensing of the Earth using satellite imagery was utilised, which allowed for determining field parameters, the placement of the windbreak system, and their characteristics. Forest inventory works were conducted using commonly accepted methods in forest mensuration, with adjustments made specifically for windbreaks. The quality class of windbreaks was determined based on the percentage of healthy trees out of the total number, and the sanitary condition index was calculated according to established categories. The analysis of the obtained data clearly shows a decline in the quality sequence of common oak from 9 to 3 units within the plantations. The windbreaks were created using the method of oak nest planting, with oak nests placed at a spacing of 5.0×3.0 m and a total windbreak width of 15.0 m. Two additional rows of companion trees were introduced in the wide 5-metre alleys, and companion and shrub species were added within the nest rows. The analysis of the characteristics of windbreaks showed that they have protective heights ranging from 19.6 m to 23.4 m and provide reliable protection for adjacent agricultural fields. Based on the range of effective protective effects of windbreaks, it can be noted that the calculated indicators provide protection with a reliable safety margin of up to 17%. If there is a need to create new windbreaks using the nest planting method in the future, a more efficient scheme is proposed, which involves placing companion tree species in the outer rows to prevent the crowns of the inner rows from spreading towards the field. As a result of the obtained findings, it became possible to conduct a comprehensive expert assessment of the state of windbreaks according to the following criteria: forestry and inventory parameters, meliorative properties, and the sanitary condition index
Volodymyr Maliuha, Victoriia Minder, and Oleksandr Sovakov
National University of Life and Environmental Sciences of Ukraine
Changes related to urban infrastructure directly affect the ecological environment, including soil properties. The purpose of this study is to investigate the anti-erosion and flow-regulating effect of park stands in complex terrain conditions of Kyiv. Forestry and tax indicators of plantings are established according to recognized tax methods. The upper layers of the soil were studied by determining the hardness, water permeability, density, and humidity on paths and in stands. Soil hardness in plantations increases from 9.1 ± 0.76-10.8 ± 1.01 kg/cm2 to 15.4 ± 0.25-30.8 ± 0.15 kg/cm2 , which is associated with the intensity of trampling them. Therewith, the soil changes from loose to medium loose and even dense. Determination of water permeability also showed a significant discrepancy, from 18.6 ± 0.76-20.6 ± 0.66 mm/min to 1.9 ± 0.10-5.7 ± 0.33 mm/min, respectively. Research has confirmed the inverse correlation between soil hardness and water permeability. The obtained indicators of soil density in the stands (1.12-1.20 g/cm3) and on the paths (1.34-1.66 g/cm3), albeit without sharp differences, in both cases indicate their criticality for further normal development of stands. Changes in soil moisture data in stands (16.9-20.6%) are decreasing in comparison with paths (11.2-12.6%), which also indicates the deterioration of growing conditions. The presence of active roots in the upper thickness of the soil on the control was 5.8-9.8 g, and on the paths, depending on the intensity of trampling, from 0.0 to 2.2 g. The territories under study were surveyed to identify characteristic erosion processes. It was established that the park spaces are in a satisfactory condition and fully perform an anti-erosion effect. The threat of erosion processes occurs on paths of intense load. The results obtained can be used for monitoring and regulating anthropogenic load