Uman National University | today: 12/25/2025
| Author(s) | Булат А. Г., , , | ||
|---|---|---|---|
| Category | The Agronomy | ||
| year | 2025 | issue | Issue 107 part 1 |
| pages | 145-154 | index UDK | 630.631.5 | DOI | 10.32782/2415-8240-2025-107-1-145-154 (Link) |
| Abstract | Problem Statement. The successful establishment and sustainable development of ornamental plantations require a reliable supply of certified, high-quality, and regionally adapted seeds. However, in the case of introduced woody species such as Catalpa bignonioides Walt., the limited availability of improved or varietal seeds significantly constrains the needs of urban landscaping and nursery operations. One of the key solutions to this issue lies in effective long-term seed storage without compromising germination capacity and seed vigor. Aims. This study aimed to determine the optimal storage period for Catalpa bignonioides Walt. seeds during which sowing qualities remain at a level suitable for practical application. Results. The research was conducted over a five-year period, combining field observations and laboratory experiments to assess germination parameters under both controlled and soil-based conditions. Short-term storage of seeds (up to 4 months) showed no noticeable reduction in germination capacity: laboratory tests revealed a germination rate of 97 %, while soil-based trials confirmed 91 %. However, a consistent decline was observed with the extension of storage time. After 16 months, soil germination decreased to 71 %, and by 28 months, the rate dropped to 56 %, corresponding to third-class seed quality by Ukrainian DSTU standards. At 40 months of storage, germination fell to only 21 %, indicating unsuitability for horticultural use. Additionally, the study established a direct correlation between the storage period and the duration of seed germination. Fresh seeds germinated in approximately 15 days, whereas seeds stored for more than two years required up to 25 days to complete germination. This extension of germination time negatively impacts seedling uniformity and planting efficiency. Conclusions. Therefore, based on the data obtained, it is recommended to use Catalpa bignonioides seeds within two years of collection to ensure high viability, strong vigor, and economic feasibility in landscape and nursery practices. | ||
| Key words | Key words: Catalpa bignonioides Walt., seed germination, storage period, seed vigor, viability loss, ornamental species, nursery management. | ||