Leaf removal is a farming practice that can affect must and grape quality; it is closely related to the meteorological conditions of the year and the climate of the area. The present study aims to analyse the effects ...Leaf removal is a farming practice that can affect must and grape quality; it is closely related to the meteorological conditions of the year and the climate of the area. The present study aims to analyse the effects of different types of defoliation, all conducted at veraison and removing 5-6 basal leaves. The trial provided four tests： leaf removal only on the east side, only on the west side, total defoliation （both sides）, and a non-defoliated treatment （control test）. Two different cultivars, the Sangiovese and the Cabernet Sauvignon, were studied in five different Italian environments： Puegnago （BS）, Scansano （GR）, Bolgheri （LI）, Brisighella （RA）, and Montefalco （PG）. The trial was repeated four times, once per year for the successive years 2007, 2008, 2009, and 2010. The years differed mainly with regard to the total rainfall; because of the variability of the years, different results, both for the same cultivar and between the cultivars, were observed. The differences existing between these two varieties and among the different environments led to different reactions to defoliation, especially concerning the analytical parameters of musts and grapes.展开更多
Different studies show that the altitude regions of the State of Santa Catarina have great potential for the production of grapevine varieties. The aim of this study was to characterize the phenological development, d...Different studies show that the altitude regions of the State of Santa Catarina have great potential for the production of grapevine varieties. The aim of this study was to characterize the phenological development, determine the thermal requirements in degree-days （DD）, the index heliothermic （IH） and climatic variables during the vegetative and productive development of varieties Merlot and Cabernet Sauvignon grown in Campo Belo do Sul （27°40′04″ S, 50°44′48″ W, altitude 950 m a.s.l.） and Sao Joaquim （28°15′13″ S, 49°57′02″ W, altitude 1,400 m a.s.l.） during 2012/2013 cycle. Phenological stages evaluated were bud break, full bloom, veraison and maturity. Higher temperatures, global radiation, PAR and lower volumes of rainfall were the main climatic parameters that differentiated Campo Belo do Sul from Sao Joaquim. Due to occurrence of higher temperatures, Campo Belo do Sul presented thermal summation around 40% higher than Sao Joaquim. The low temperatures of Sao Joaquim extended the period of grape ripening and were responsible for the highest levels of titratable acidity and the higher concentrations of anthocyanins and total polyphenols in both varieties. The results show that in the altitude ranges studied （900 and 1400 m）, climatic behavior and viticultural performance of Cabernet Sauvignon and Merlot were suitable for producing quality wines.展开更多
文摘Leaf removal is a farming practice that can affect must and grape quality; it is closely related to the meteorological conditions of the year and the climate of the area. The present study aims to analyse the effects of different types of defoliation, all conducted at veraison and removing 5-6 basal leaves. The trial provided four tests： leaf removal only on the east side, only on the west side, total defoliation （both sides）, and a non-defoliated treatment （control test）. Two different cultivars, the Sangiovese and the Cabernet Sauvignon, were studied in five different Italian environments： Puegnago （BS）, Scansano （GR）, Bolgheri （LI）, Brisighella （RA）, and Montefalco （PG）. The trial was repeated four times, once per year for the successive years 2007, 2008, 2009, and 2010. The years differed mainly with regard to the total rainfall; because of the variability of the years, different results, both for the same cultivar and between the cultivars, were observed. The differences existing between these two varieties and among the different environments led to different reactions to defoliation, especially concerning the analytical parameters of musts and grapes.
文摘Different studies show that the altitude regions of the State of Santa Catarina have great potential for the production of grapevine varieties. The aim of this study was to characterize the phenological development, determine the thermal requirements in degree-days （DD）, the index heliothermic （IH） and climatic variables during the vegetative and productive development of varieties Merlot and Cabernet Sauvignon grown in Campo Belo do Sul （27°40′04″ S, 50°44′48″ W, altitude 950 m a.s.l.） and Sao Joaquim （28°15′13″ S, 49°57′02″ W, altitude 1,400 m a.s.l.） during 2012/2013 cycle. Phenological stages evaluated were bud break, full bloom, veraison and maturity. Higher temperatures, global radiation, PAR and lower volumes of rainfall were the main climatic parameters that differentiated Campo Belo do Sul from Sao Joaquim. Due to occurrence of higher temperatures, Campo Belo do Sul presented thermal summation around 40% higher than Sao Joaquim. The low temperatures of Sao Joaquim extended the period of grape ripening and were responsible for the highest levels of titratable acidity and the higher concentrations of anthocyanins and total polyphenols in both varieties. The results show that in the altitude ranges studied （900 and 1400 m）, climatic behavior and viticultural performance of Cabernet Sauvignon and Merlot were suitable for producing quality wines.
