Final answer:
Süssreserve is the practice of adding unfermented grape juice or must to a wine to increase its sweetness, commonly used in German winemaking. It can be added to German wine styles like Riesling, Gewürztraminer, Müller-Thurgau, and some red wine varieties.
Step-by-step explanation:
Definition of Süssreserve:
Süssreserve refers to the practice of adding unfermented grape juice or must to a wine to increase its sweetness. This technique is commonly used in German winemaking to produce off-dry or semi-sweet wines.
German wines that can have Süssreserve added:
Süssreserve can be added to various German wine styles, including Riesling, Gewürztraminer, Müller-Thurgau, and even some red wine varieties like Dornfelder and Spätburgunder.