French term (bâton = stick, rod) for the mechanical stirring of the lees during fermentation; see under lees storage.
Wine-making method in which the wine is left for a longer period of time on the lees formed during fermentation. It is either stored on the full lees (also coarse lees, sediment after fermentation) or on the fine lees (fine parts of the yeast suspended in the wine after racking in other containers). The French term is "sur lie" or "tirage sur lie". According to Cato the Elder (234-149 BC), this method was already known to the Romans in antiquity.
This measure favours the malolactic fermentation (BSA = Biological Acid Degradation) and additional flavours such as mannoproteins as well as carbon dioxide get into the wine. This gives the wine a pleasant yeast tone and a fresh, tangy taste. The duration depends on the type of wine, but can take place over several months or even longer. In principle, yeast storage is common in the production...
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