Phenology, thermal requirements and maturation of the SR 0.501-17 white wine grape hybrid cultivated in contrasting climatic conditions

Abstract

The SR 0.501-17 grape hybrid developed for wine making purposes, is characterized for producing white and small berries with seeds. The purpose of this study was to characterize the phenology, thermal requirements and must physicochemical characteristics of the hybrid, in contrasting climatic conditions due to altitude at Jundiaí (715 m) and Votuporanga (483 m) respectively located at east and northwest of the São Paulo State-Brazil. Evaluations were performed from 2012 to 2016 and observations during the vine growth period and data of phenology and must soluble solids content and acidity measurements at harvest were taken. Average duration of the pruning-harvest period was 146 and 131 days and grape maturation period was 29 and 27 days, respectively for Jundiaí and Votuporanga. Thermal requirement expressed in degree days for the hybrid growth cycle was 1663 and 1923, respectively for Jundiaí and Votuporanga. Rainfall during the maturation period showed negative correlation with total soluble solids and maturation index and positive correlation with titratable acidity. The effect of temperature on vine growth cycle were more pronounced in Jundiaí in comparison to Votuporanga while the effect of rainfall on the maturation characteristics were more effective in Votuporanga when compared to Jundiaí.

Effects of Climate Change and Phenological Monitoring of the Indigenous Godello Variety in a Territory of Heroic Viticulture and Biosphere Reserve

“…This includes great spatial and temporal variability in temperature and phenology within the same wine-growing area [26], which can lead to different conditions, such as drier periods during the grape ripening phase depending on the sub-area in which the vineyard is located. Today it is difficult to understand the extent of climate change on viticulture as the literature on this topic is quite recent, with 2000 being the first year in the WoS dataset, and from this time onwards there has been a significant growth in the number of publications, indicating the days, probably due to regional climatic conditions, as a consequence of low temperatures due to the high altitude, and to the genetic characteristics of the cultivar [29].…”