4 documents found, page 1 of 1
Using aerial thermal imagery to evaluate water status in <i>Vitis vinifera cv.<...
Araújo-Paredes, Cláudio; Portela, Fernando; Mendes, Susana; Valín, Maria IsabelThe crop water stress index (CWSI) is a widely used analytical tool based on portable thermography. This method can be useful in replacing the traditional stem water potential method obtained with a Scholander chamber (PMS Model 600) because the latter is not feasible for large-scale studies due to the time involved and the fact that it is invasive and can cause damage to the plant. The present work had three o...
Dual crop coefficient approach in vitis vinifera L. cv. Loureiro
Silva, Simão P.; Valín, Maria Isabel; Mendes, Susana; Araújo-Paredes, Claúdio; Cancela, Javier J.Vineyard irrigation management in temperate zones requires knowledge of the crop water requirements, especially in the context of climate change. The main objective of this work was to estimate the crop evapotranspiration (ETc) of Vitis vinifera cv. Loureiro for local conditions, applying the dual crop coefficient approach. The study was carried out in a vineyard during two growing seasons (2019–2020). Three ir...
Training systems evaluation of vitis vinifera L. Alvarinho (vinhos verdes PDO r...
Valín, Maria Isabel; Araújo-Paredes, Cláudio; Mendes, Susana; Dafonte, J.; Alonso, Joaquim Mamede; Rodrigues, Ana Sofia; Cancela, J. J.In the Vinhos Verdes wine region, the largest Protected Designation of Origin (PDO) region in Portugal, the most common ‘Alvarinho’ training system is single downward shoot positioning (DSP), which is currently being replaced by vertical shoot positioning (VSP). This work aimed to evaluate physiological and productive parameters of ‘Alvarinho’ grapevines in both training systems. This study was carried out in 2...
Agro-ecological terroir units in the North West Iberian Peninsula wine regions
Cardoso, Andreia Saavedra; Alonso, Joaquim Mamede; Rodrigues, Ana Sofia; Araújo-Paredes, Cláudio; Mendes, Susana Miguel; Valín, Maria IsabelViticultural zoning studies that support the definition of terroir units general follow two main approaches of geographic differentiation related either to: a) land capability or vineyard suitability, or b) grape, grapevine or wine characteristics. Both approaches are commonly considered in the definition of terroir at regional and local approaches. The purpose of this preliminary study was to develop and apply...