The aim of the research work is to analyze the biological manifestations of the local Bulgarian variety Pamid grown in the South central region. The experiment was conducted during the period 2022-2024. The duration of the main phenological phases in days during the vegetation of the vines was monitored (bud burst-first leaf, first leaf-flowering, flowering-pea size, pea size-veraison, veraison-technological ripeness, bud burst-technological ripeness). Emphasis is also placed on agrobiological indicators, in order to determine the reproductive variety potential, giving an overall assessment of its economic efficiency. High values of developed buds (84.63%) and a relatively high percentage of fruiting shoots (73.86%) were established, which contributes to the formation of a sustainable yield. The coefficient of actual fertility varies depending on climatic conditions, remaining within the limits for the variety (1.28) and reflecting the influence of the environment on the fruiting processes. The obtained average yield per vine (3.35 kg) and per hectare (10486.95 kg) shows relative stability even in the presence of climatic changes. Variety Pamid exhibits good adaptability to variations in temperature regime and water deficit. The study contributes to a better understanding of the response of local grape varieties to environmental changes and their role in the future development of the viticulture and wine sector. The obtained results confirm the importance of the variety Pamid as an adaptive local genotype with potential for sustainable viticulture, provided that appropriate agrotechnical practices are applied.

bud burst, climatic conditions, coefficient of actual fertility, fruiting shoots, variety Pamid, yield

agronomy

Presentation: poster