Comparaçâo entre as regiôes vitícolas de Sâo Joaquim - Sc. Brasil e San Michele all'Adige, TN, Italia

The grapevine phenology, plant yield and grape quality have a strong relationship with environmental factors. The objective of this study was to compare the wine producing regions of the State of Santa Catarina in Brazil and the region of San Michele All’Adige located in Italy. The data used in this study came from São Joaquim Experimental Station - EPAGRI (28°16’30,08”S, 49°56’09,34”W, altitude 1,400 m), located in São Joaquim and from Istituto Agrario di San Michele All’Adige - Fondazione Edmund Mach (46°11’41,46 “N, 11°08’04,41”E, altitude 223m), located in the Province of Trento. The evaluated variety was Rebo, the main phenological stages were recorded and thermal requirement was calculated through the growing degree-days. The climatic parameters evaluated were, maximum, mean and minimum temperature, amplitude, precipitation, relative humidity, sunlight and solar radiation. At harvest was evaluated the agronomic performance. In São Joaquim the cycle of Rebo is longer, the heat summation is lower, the precipitation and accumulated solar radiation are higher than in San Michele All’Adige. Lower temperatures and lower sunlight during flowering-veraison are the main climatic factors related to lower yields. In São Joaquim, lower temperatures and higher rates of solar radiation during maturation contribute positively in the formation of phenolic compounds, but make difficult acids degradation of Rebo variety.