Vineyard irrigation: Comparison of drip irrigation and deep sub-irrigation systems (deep root irrigation) for sustainable consumption of the water resource

Increasingly frequent adverse weather events, such as reduced rainfalls and high temperatures, are challenging viticulture, with consequences on grape production and quality. The objective of this three-years study conducted in Arezzo was to compare two treatments, Drip Irrigation System (DIS) and Deep Root irrigation (DRI), in vineyard to evaluate their impacts on grape and pruning wood productions. The research assessed various measures, including soil humidity, plant water status, canopy thermal imaging, production and grape quality, as well as the effectiveness of a new sub-irrigation technique. The results do not definitively indicate which method is superior, as both systems produce comparable outcomes in several key aspects, even if DRI consumes less water compared to DIS. The study highlights the need for advanced irrigation practices and innovative technologies to improve vineyard productivity and sustainability to face changing climate conditions.