Abstract
This study aimed to determine the variability of plant nutrition content in two-year old local and well-known wine grape cultivars under different water constraint scenarios. Own rooted and potted eight grapevine cultivars (cv. ‘Adakarası’, ‘Papazkarası’, ‘Karasakız’, ‘Karalahana’, ‘Yapıncak’, ‘Vasilaki’, ‘Cabernet Sauvignon’ and ‘Sauvignon Blanc’) were subjected to five irrigation treatments (100% daily irrigation of available water capacity (AWC), 75% irrigation of AWC, 50% irrigation of AWC, 25% irrigation of AWC, and no irrigation for 0% treatment) for two consecutive years during vegetative growth (May – late September). An increase in nitrogen, potassium and magnesium contents in leaf tissues with decreasing water amount was observed. Similar effect was found for phosphorus and calcium contents. The sulfur concentration in leaf tissues remained almost unchanged. In addition, the variability of genetic potential influenced the nutrient intake of the studied cultivars. The ability of grapevine cultivars to cope with the water deficit of the cultivars should definitely be assessed in adaptation strategies developed to make viticulture sustainable under the effects of the climate crisis.
Highlights
The importance of biodiversity and local cultivars have been repeatedly emphasized by many researchers (Ergül et al, 2011; Balda et al, 2014; Yılmaz et al, 2020)
This study aimed to determine the variability of plant nutrition content in two-year old local and well-known wine grape cultivars under different water constraint scenarios
The reason for the increasing trend towards local cultivars is that it has been a natural phenomenon throughout history, climate change is happening faster than ever before and a greater human impact on this alteration exists
Summary
The importance of biodiversity and local cultivars have been repeatedly emphasized by many researchers (Ergül et al, 2011; Balda et al, 2014; Yılmaz et al, 2020). These risks are largely due to severe dryness, heat waves, severe soil water deficit (Tóth and Végvári, 2016) and unwanted precipitation during vegetation (Candar et al, 2019a). Changes in nutrient utilization reveal a potential for related changes in vine productivity and berry quality These potential yield and quality levels are determined by climate, environmental CO2 and cultivar characteristics.
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