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 grapes 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 (715m) and Votuporanga (483m) 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.

摘要：专为酿酒培育的SR 0.501-17葡萄杂交品种，其典型特征为结出带籽的白葡萄与小型浆果。本研究旨在巴西圣保罗州东部的容迪亚伊（Jundiaí，海拔715米）与西北部的沃图波朗加（Votuporanga，海拔483米）这两处因海拔差异形成的迥异气候条件下，对该杂交品种的物候期、需热量与葡萄醪理化特性进行系统表征分析。试验于2012年至2016年间开展，期间记录了葡萄生长期的各项观测数据，并在采收阶段测定了物候指标、葡萄醪可溶性固形物含量与酸度指标。容迪亚伊与沃图波朗加的剪枝至采收平均时长分别为146天与131天，葡萄成熟周期分别为29天与27天。该杂交品种生长周期的需热量以度日数为计量单位，两地分别为1663与1923。成熟期降雨量与可溶性固形物总量及成熟指数呈负相关，与可滴定酸度呈正相关。相较于沃图波朗加，容迪亚伊地区的温度对葡萄生长周期的影响更为显著；而相较容迪亚伊，沃图波朗加地区的降雨量对葡萄成熟特性的影响更为突出。