Potassium

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The bluish-silvery, soft alkali metal is the seventh most common element (K) in the earth's crust, accounting for around 2.5% of the total. The name is derived from the Arabic "al kalja" for "potash" (potassium), a potassium carbonate obtained from wood ash. This highly reactive element only occurs in nature in bound form. It is contained in many minerals such as mica, feldspar, kainite, potassium salt, polyhalite and clay. Increased fertilisation with potassium causes the vine to react with increased production of malic acid. Potassium therefore has an influence on the acidity of the wine. Potassium-rich wines have a "buffered or integrated acidity" that is perceived as balanced. Compared to other minerals, potassium is present in high quantities in must (up to 1.5 g/l) or wine.

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Potassium

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