Relationship between water availability and viticultural performance of Sangiovese, Montepulciano, and Trebbiano Toscano

摘要

The script reports a long-term research project, located in the Ascoli Piceno area, that investigated the characterization of climatic parameters, physical and chemical properties of the soils and viticultural performance of three vine varieties (Montepulciano, Sangiovese, and Trebbiano) over three consecutive years (1999-2000-2001). The varieties were selected as having different capacities of adaptation to the environment and distinct seasonal courses. All three varieties, but particularly the Montepulciano and Sangiovese, are affected by "through the season" effects and subsequently alter the length of the phenological intervals, budding-flowering and flowering-veraison. Annual rainfall is decisive, in particular for Montepulciano, as it limits the dry matter accumulation. The climate in June, July, and August, expressed as the Selyaninov Aridity Index (Al), affected acidity in all the varieties as well as the must, in Sangiovese the sugar content, and in Montepulciano the amount of polyphenolsin the wine.