Agriculture and forestry

Neyko Ihor – Doc., sеnior rеsеarchеr of SЕ «Vinnytsia Forеst Rеsеarch Station» (21036, 39, Pravednykiv Svitu St., Vinnytsia. e-mail: ihor_neyko@ukr.nеt).

Matusiak Mikhailo – Сandidate of Agricultural Sciences, Associate Professor, Head of the Department of Forestry and Horticulture, Faculty of Ecology, Forestry and Horticulture, Educational and Scientific Institute of Agricultural Technologies and Nature Management of Vinnytsia National Agrarian University (21008, Vinnytsya, Soniachna st. 3. e-mail: mikhailo1988@gmail.com).

Razanov Serhii – Doctor of Agricultural Sciences, Professor of the Department of Forestry and Horticulture, Faculty of Ecology, Forestry and Horticulture, Educational and Scientific Institute of Agricultural Technologies and Nature Management of Vinnytsia National Agrarian University (21008, Vinnytsya, Soniachna st. 3. e-mail: razanov@vsau.vin.ua).

Razanova Alla – PhD (Ecology), Senior Lecturer of the Department of Forestry and Horticulture, Faculty of Ecology, Forestry and Horticulture, Educational and Scientific Institute of Agricultural Technologies and Nature Management of Vinnytsia National Agrarian University (21008, Vinnytsya, Soniachna st. 3).

Mudrak Halyna − Candidate of Geographical Sciences, Associate Professor of the Department of Ecology and Environmental Protection, Vinnytsia National Agricultural University (Vinnytsia city, galina170971@ukr.net).

The study examines the peculiarities of reproductive processes in clonal plantations of European spruce (Picea abies (L.) Karst.) of Finnish origin in the context of sustainable forestry. The research is based on the analysis of generative structures' formation, specifically microstrobili and macrostrobili, as well as the general physiological state of trees in the plantation. The findings contribute to the development of effective forestry strategies aimed at mitigating the adverse effects of climate change and ensuring the long-term sustainability of spruce plantations. The study was conducted in 2023 in the Lityn Forestry District (Vinnytsia Forestry Branch, Ukraine). A comprehensive assessment of the reproductive potential of spruce clones was carried out, with a focus on the intensity of microstrobili and macrostrobili formation. The results indicate significant variability in reproductive traits among different genotypes. The average intensity of microstrobili formation across all studied genotypes was 4.4 points, with maximum values reaching 5 and minimum values dropping to 0. The deviation ranged from 0.4 to 1.5, and dispersion varied from 0.2 to 2.2. The most stable and highly reproductive genotypes included E1020, E11, E1156, and E269, which demonstrated minimal fluctuations in reproductive intensity and consistently high values.Similarly, macrostrobili formation exhibited variability among genotypes. The average macrostrobili formation score was 3.5, with maximum values reaching 5 and minimum values of 0. The highest reproductive stability was observed in clones E11, E253, and E268, which showed minimal deviation and dispersion. The findings indicate that genotypic differences significantly influence reproductive potential and should be considered when selecting material for clonal plantations. The overall physiological condition of trees in the clonal plantation was also assessed. The health index averaged 1.1 points, with maximum values reaching 5.0 and a minimum of 1.0. Most genotypes exhibited stable physiological conditions, indicating favorable growth conditions and proper plantation management. However, certain genotypes demonstrated higher variability in health status, suggesting the need for additional monitoring and adaptive silvicultural practices. The results confirm that the use of selected, highly productive genotypes in clonal plantations can significantly improve reproductive efficiency, ensuring the sustainability of spruce forests.

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