Study on the Berry Mature Property of Wine Varieties of Grape
Li Jiming and Li Hua(Department of Horticulture. Northwest Agriculture University, Yangling, Shaanxi, 712100)
Results showed that the juice components of the berries changed continually during its ripening. The sugar content was changed with a "S" curve, while the acids showed a logistical curve. They were probably the best index for determining the berry maturity. The variation of berry maturity among varieties was probably attributed to the variation of the increasing rate of sugar accumulation and the decreasing rate of the acids. Ripening process of grape berries was significantly influenced by the climate.