Irrigation management of white grape varieties has received less attention than the red varieties in Spain, having facing generally towards the increase of grape yield.
Vineyards are traditionally rainfed in Portugal. However, in drier and southern regions (e.g. Alentejo) water supply by irrigation is increasingly being used. Deficit irrigation (DI) strategies are mandatory due to the relationships between vineyard water status and crop yield and wine quality.
The objective of the study was to test the feasibility of stem and shoot hygrometers for the continuous and nearly non-destructive assessment of grapevine water potentials in the field under varying environmental conditions.
The effects of deficit irrigation strategies on soil water dynamics, vines physiologic and productive performance were studied in Vermentino grapevines grown on a deep clay soil, during 2009 and 2010, in South Sardinia (Italy).
The hot and dry climate of the Douro Demarcated Region (DDR), Portugal, particularly during the summer, induces soil water deficits that influence the growth and development of grapevines.
Winegrowing in warm, dry areas usually compromises berry growth and must composition, and therefore the composition of the resulting wines.
Nowadays, irrigation of vineyard is a good tool that can help to mitigate the effects of climate change that most of worldwide wine areas suffer. Its application is determined by several variables, being the period and dose of application the most important.
Mediterranean climate is characterized by hot summer, high evapotranspiration rates, and scarce precipitations (400 mm per year) during grapevine cycle.
In Europe there is an increasing consumer demand for residue-free, organically grown table grapes. Organic table grapes cultivation, however, is very delicate and experience to advice organic growers is still quite lacking.
The dependency of ѱs on soil water availability and air vapour pressure deficit (VPD) the diurnal pattern of the ѱs was assessed during the 2009 growing season in an irrigation experiment set up at the Dão Wine Research Station (CEVDão), Nelas, Portugal.
The petiole hydraulic conductance (Kpetioles) and the vulnerability to cavitation (PLC, percentage loss of hydraulic conductivity) in leaf petioles and stems were monitored on field-grown vines (Vitis vinifera L. cv. Chasselas).
The seedless table grape cultivar ‘BRS Clara’ (Vitis vinifera L.) presents yellowish-green berries and was developed for growing in tropical regions.
In recent years, an uneven distribution of rainfall in Galicia has been observed, the variations in the frequency and amount of rainfall increased the interest for irrigating the vineyards within the Galician wine sector.
Water is essential to the development of any plant. As a result of current climate change, good management is required in many areas, especially in viticulture in a context of increasing competitiveness.
The objective of the study was to test the feasibility of a conversion of vineyards with vertical shoot positioning (espalier type) to minimal pruning with 50 % of the original plant density with regard to their water relations under non-irrigated conditions.