Response of Albariño to local environmental conditions in Uruguay
Context and purpose of the study
Albariño is a white cultivar that has been recently promoted in Uruguay due to its ability to maintain high berry quality even in adverse climate conditions during ripening. This study aims to assess the effect of different topographic conditions on Albariño agronomic behavior and oenological potential.
Material and methods
Ten Albariño plots located at different aspects of exposure, altitude and slope were selected in the emerging wine-growing region of Eastern Uruguay. To assess spatial temperature variability due to the topography conditions, a temperature sensor was installed in each plot. Bioindicators for grapevine were calculated, and relationships between site topography and plant responses (yield components and berry composition) were analyzed using climatic and agronomic data recorded over three seasons (2019, 2020, and 2021).
In the plots of Albariño under study, we found that the interactions between topography and berry metabolites varied through the seasons. The slope was the topography factor which showed a more substantial impact on local temperature and berry metabolites. Plots on steeper slopes (8.8 to 11.6º) favored grapes with a higher acid content (more than 0.43 gH2SO4 per liter), while plots at lower elevations provided berries with higher amounts of secondary metabolites (more than 1.6 units of phenol richness). No significant statistical relationships were found between yield, local climate, and topography. This cultivar showed less differences in berry composition associated with temporal and spatial climate variability due to topography than other cultivars like Tannat (red cultivar).
Issue: GiESCO 2023
1Facultad de Agronomía, Universidad de la República, Av. E. Garzón 780, CP 11400 Montevideo, Uruguay
2Laboratoire LETG-Rennes UMR 6554 CNRS, Université de Rennes II, Place du Recteur Henri Le Moal, 35043, Rennes, France