Method for judging optimal harvesting time of grape raw materials for brewing brandy

Abstract

The invention discloses a method for judging the optimal harvesting time of grape raw materials for brewing brandy, which is different from the prior art in that the content of glucose and fructose in grape fruits is detected when the sugar-acid ratio of the grape fruits reaches 15 to 20; when the mass ratio of fructose to glucose in the grape fruits is not lower than 1.035, the fruits reach the optimal harvesting time. According to the method, important flavor substance sugar is subdivided, and sugar components are included in a detection range; a plurality of physicochemical indexes are integrated together, so that the balance state among the component substances can be more accurately grasped, and the optimal harvesting time of the wine grapes can be more accurately grasped. A lot of rainwater before and after the grape harvesting period has great influence on flavor substance components such as total sugar, and the method can rectify the harvesting period misjudgment caused by a single index theoretic method, so that the aroma richness and the taste smoothness of the brandy are improved, and the quality stability of the product is improved.

Description

technical field [0001] The invention belongs to the fields of grape planting and wine brewing, and in particular relates to a method for judging the optimal harvest period of grape raw materials for brewing brandy. Background technique [0002] Both wine and brandy are made from fresh grapes or grape juice through fermentation and other processes. The quality of raw materials determines the quality of wine, and maturity is the main quality index of grapes. [0003] The maturity of the grape raw materials directly determines the plasticity in the later stage. The wine produced by the grapes that have reached the optimal harvesting period has a richer fruity aroma and a more delicate taste. Wine grapes contain a variety of flavors, and the best picking state of wine grapes is to achieve a balanced state among the various components. However, the existing judging indicators are single, and usually only rely on sugar and acid to judge the harvest period. There are large differ...

AI Technical Summary

Problems solved by technology

However, the existing judgment index is single, and usually only rely on sugar and acid to judge the harvest period

There are large differences in the apparent characteristics and quality indicators of the optimal harvest period of grapes in different production areas, different management models and ecological conditions. It is difficult to accurately grasp the optimal harvest period only by relying on a single indicator. , There is a large difference in temperature difference between day and night, which affects the speed of sugar accumulation and acid conversion, so it is easy to cause other situations where the sugar-acid ratio is appropriate and the total sugar and total acid content are higher or lower than the optimum value at the same time.

The harvesting period in some production areas coincides with the rainy season, and the rain has a great impact on the sugar index. In actual production, the inaccurate grasp of the harvesting period often results in the loss of brandy aroma and quality.

Images