Heat stress is among the most critical abiotic constraints on cereal productivity, necessitating intensified breeding strategies. While elevated temperatures can occur at multiple developmental stages, heat stress during the post-anthesis period is particularly damaging, as it disrupts grain formation and filling, leading to substantial yield reductions. Although the study was conducted in a region traditionally favourable for barley cultivation, long-term meteorological records reveal a steady increase in post-anthesis temperatures over the past three decades, increasing crop vulnerability. Under these conditions, evaluating varietal performance and heat tolerance in line with current climatic trends is essential. In this study, chemical desiccation was applied to simulate heat stress by inhibiting photosynthesis, enabling assessment of the capacity of spring barley cultivars to remobilize assimilates from vegetative tissues to the grain. Ten cultivars were evaluated over three years under both stress and non-stress conditions, focusing on key yield components.
Emanuela Filip, C. Urdă, Matilda Ciucǎ et al.· Romanian Agricultural Resear...· 1 citation
Nowadays, biostimulants are increasingly being applied to potato crops to increase nutrient efficiency and better tolerate abiotic stress. Aiming to achieve sustainable potato crops, biostimulants have positive effects on crop yield. This research investigates the effects of foliar fertilization, planting density, and environmental conditions on yield and tuber quality (starch, protein, ash, dry matter content) in two potato cultivars, Darilena and Ultra, across two locations (Brașov and Codlea) in the year 2023 and 2024. The experiment involved five foliar fertilizer treatments: control (V1), two biostimulants - Genaktis (V2) and Irys (V3), a third biostimulant - Number One (V4) and a foliar fertilizer with biostimulant properties - Wuxal Macromix (V5). Results showed that Ultra at 53,000 plants/ha combined with biostimulants V4 and V5 achieved the highest yields, particularly in 2023. Darilena consistently recorded higher starch and protein content, especially in 2024 and under lower planting density. PCA and correlation analyses revealed that the yield was negatively associated with starch and dry matter, while starch strongly correlated with dry matter content. These results emphasize the need to align cultivar choice, fertilization strategy, and planting density with local environmental conditions to maximize tuber quality and yield.
Lorena Adam, M. Hermeziu, C. Urdă et al.· Romanian Agricultural Resear...· 0 citations
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