The 'Niagara Rosada' grape has been highlighted as an alternative to the diversification of fruits growing in irrigated areas of the semi-arid Brazilian regions. The objective of this research was to characterize and compare the length of time in days and the thermal requirements in degree-days, taking in account twelve sub-periods of their phenological cycle, from pruning to harvesting. The study was carried out in the vineyard Santa Catarina, in the county of Janaúba, north of Minas Gerais - Brazil. Grapevines, grafted on the rootstock IAC 572 'Jales' were irrigated by microaspersion. The amount of days and the thermal requirement were determined in the same plants on two consecutive pruning dates. The total length of the cycle, varied from 116 days for the grape pruned in January, and 123 days for those pruned in July. The base temperature used for the study was 10° C. The total amount of degree days for the grape pruned in January was 1838; while for the ones pruned in July were 1766.
vineyard; semi-arid; biometeorological index
