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The grapevine production in high altitude regions of southern Brazil is recent and there is little information about the phenological stages and thermal requirements of different grape varieties. The objective of this study was to determine the phenology and thermal requirements of Chardonnay, Sauvignon Blanc, Cabernet Sauvignon, Merlot, Pinot Noir, Cabernet Franc and Sangiovese. The experiment was conducted at the Experimental Station of São Joaquim, EPAGRI, (28"1T39" S; 49°55'56" W, altitude 1,415 meters). The phenological stages evaluated were bud break, flowering, change in berry skin color and maturity, during seasons 2004/05, 2005/06 and 2006/07. Thermal requirements were calculated by degree-days, considering base temperature of 10°C. At harvest, technological maturity was determined by analyses of total soluble solids, titratable acidity and pH. It was observed a delay in vine cycle, because harvest occured later in this place than in other Brazilian regions. The thermal durations are a good indicator of vine development phases. Regions above 1,300m should give preference to varieties with cycle between September 15 and April 15. [ABSTRACT FROM AUTHOR]

A produção de uvas viníferas nas regiões de elevada altitude do estado de Santa Catarina é recente e há poucas informações disponíveis a respeito das características fenológicas e das exigências térmicas para as variedades utilizadas. O objetivo deste trabalho foi caracterizar o comportamento fenológico e determinar as exigências térmicas das variedades Chardonnay, Sauvignon Blanc, Cabernet Sauvignon, Merlot, Pinot Noir, Cabernet Franc e Sangiovese. A área experimental foi instalada na Estação Experimental da EPAGRI, localizada em São Joaquim (28°17'39"S; 49°55'56"W, altitude 1.415m). Os estádios fenológicos avaliados foram início da brotação, floração, mudança de cor das bagas e maturidade nos ciclos produtivos de 2004/05, 2005/06 e 2006/07. A exigência térmica das variedades foi calculada empregando-se o somatório de graus-dia, considerando-se temperatura-base para a videira de 10°C. Na colheita, a maturação tecnológica foi determinada através das análises de sólidos solúveis totais, acidez titulável e pH. O ciclo das variedades viníferas avaliadas na região de São de Joaquim é mais longo do que o observado em outras regiões produtoras do Brasil. A duração térmica é um bom indicador de desenvolvimento das fases do ciclo da videira. Para as regiões com altitude acima de 1.300m, deve-se dar preferência para o plantio de variedades com ciclos entre 15 de setembro até 15 de abril.The grapevine production in high altitude regions of southern Brazil is recent and there is little information about the phenological stages and thermal requirements of different grape varieties. The objective of this study was to determine the phenology and thermal requirements of Chardonnay, Sauvignon Blanc, Cabernet Sauvignon, Merlot, Pinot Noir, Cabernet Franc and Sangiovese. The experiment was conducted at the Experimental Station of São Joaquim, EPAGRI, (28°17'39" S; 49°55'56" W, altitude 1,415 meters). The phenological stages evaluated were bud break, flowering, change in berry skin color and maturity, during seasons 2004/05, 2005/06 and 2006/07. Thermal requirements were calculated by degree-days, considering base temperature of 10°C. At harvest, technological maturity was determined by analyses of total soluble solids, titratable acidity and pH. It was observed a delay in vine cycle, because harvest occured later in this place than in other Brazilian regions. The thermal durations are a good indicator of vine development phases. Regions above 1,300m should give preference to varieties with cycle between September 15 and April 15.