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HomeNews!The solar radiation and grapes’ maturation

July 03 2017

The solar radiation and grapes’ maturation

  • Grape maturation is more important when the vine is exposed to the sun
  • Moreover, when the vine is exposed to the sun with a ventilation of the exposed parts, it has a higher maturation than when it is simply exposed to the sun.

So :

  • During the day, when temperature is close to the photosynthetic optimum of the vine (25-35 ° C), it is favorable to the accumulation of sugars in the bay.
  • When the temperature is too high, the content of anthocyanins and malic acid in the grapes is reduced.
  • Temperature plays a positive role in the accumulation of anthocyanins in the grapes around 20 ° C (15-25 ° C).
  • Low night temperatures favorise the color of the grapes, their acidity and partly their sugar content.
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