Action du chlorure de sodium sur la composition des baies de vigne cultivées en hors-sol
DOI:
https://doi.org/10.5073/vitis.1993.32.215-221Keywords:
sodium chloride, salinity, Vitis hydroponics, yield, organic composition, berry qualityAbstract
La variété Cabernet Sauvignon greffée sur 101-14 a été cultivée en milieu hydroponique et alimentée par une solution nutritive équilibrée (témoin) surchargée en chlorure de sodium (6, 40 et 80 meq∙l-1) durant trois années consécutives. A forte dose, un effet dépressif se manifeste sur le rendement en baies, accompagne par l'acceleration de la maturation; aux autres doses, le NaCl provoque une augmentation du rendement. La teneur en sucres croit avec la richesse du milieu en NaCl, alors que le taux des composés phénoliques et des tanins est maximum pour les faibles doses de NaCl et l'acidite totale relativementstable.
Influence of sodium chloride on the composition of berries in hydroponically grown grapevines
Plants of Vitis vinifera Cabernet Sauvignon clone no. 161 grafted on rootstock 101-14 M.G. clone no. 13 were grown hydroponically for 3 years in a balanced nutrient solution, in the presence of 6, 40 and 80 meq∙l-1 of NaCl. 6 and 40 meq∙l-1 of sodium chloride in the nutrient solution had beneficial effects on the plant biomass, and also on the yield, but growth and yield of berries were impaired by 80 meq∙l-1 NaCl doses, whereas maturation occurred earlier. The concentration of sugar and tartaric acid increased with the sodium chloride dose whereas phenolic compounds, tannins and malic acid decreased. Total acidity was rather constant.
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