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Scientific publication: Post-Harvest Regulated Deficit Irrigation in Chardonnay Did Not Reduce Yield but at Long-Term, It Could Affect Berry Composition

Future increases in temperatures are expected to advance grapevine phenology and shift ripening to warmer months, leaving a longer post-harvest period with warmer temperatures. Accumulation of carbohydrates occurs during post-harvest, and has an influence on vegetative growth and yield in the following growing season. This study addressed the possibility of adopting regulated deficit irrigation (RDI) during post-harvest in Chardonnay. Four irrigation treatments during post-harvest were applied over three consecutive seasons: (i) control (C), with full irrigation; (ii) low regulated deficit irrigation for sparkling base wine production (RDIL SP), from harvest date of sparkling base wine, irrigation when stem water potential (Ψstem) was less than −0.9 MPa; (iii) mild regulated deficit irrigation for sparkling base wine production (RDIM SP), from harvest date of sparkling base wine, irrigation when Ψstem was less than −1.25 MPa; (iv) mild regulated deficit irrigation for wine production (RDIM W), from harvest data of wine, irrigation when Ψstem was less than −1.25 MPa. Root starch concentration in full irrigation was higher than under RDI. Yield parameters did not differ between treatments, but differences in berry composition were detected. Considering that the desirable berry composition attributes of white varieties are high in titratable acidity, it would seem inappropriate to adopt RDI strategy during post-harvest. However, in a scenario of water restriction, it may be considered because there was less impact on yield and berry composition than if RDI had been adopted during pre-harvest.

Download the full scientific article: Post-Harvest Regulated Deficit Irrigation in Chardonnay Did Not Reduce Yield but at Long-Term, It Could Affect Berry Composition

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How will climate change affect the viticulture in the coming decades in Europe?

Conclusions from the Decadal Projections Performance Report

Facing climate change and climate variability is one of the main challenges in viticulture. Developing strategic actions to adapt viticulture to the impacts of a warmer climate is one of the main interests of the sector, which has been suffering for changes in the quality and yield.

A report has recently been published by VISCA project Decadal projection performance report (D2.5) which provides a set of regional climate projections at European scale and at demosites of the project (Campania region, Mirabella Eclano Estate (Mastroberardino-Italy), Costers del Segre region, Raimat hills (Codorniu- Spain),  Douro Valley, Porto (Symington-Portugal)). These projections would bring an added value for the wine industry to plan long-term adaptation strategies to face climate change and a new climate variability in the coming decades.

First of all, EURO-CORDEX climate projections have been analysed in terms of their ability to reproduce the historical climate. As a result, it has been confirmed that EURO-CORDEX is representing correctly the temporal and spatial correlation of the main interesting variables such as mean temperature and precipitation, climate extremes such as droughts, spring frosts and heatwaves and, finally, specific agronomical parameters such the Winkler index.

After that, the analysis of climate projections at European scale and at demosites is providing by comparing the climatology off the period 2070-2099 against the historical period 1976-2005. In terms of precipitation, a decrease in the southern European countries, which is more intense in the summer months. In terms of temperature, there is a clear increase throughout Europe, although it is more intense in southern countries like Spain, Portugal, Italy, Greece and in norther countries like Sweden and Finland. Regarding extreme events, there is an increase of the length of droughts, especially in the Iberian Peninsula, a decrease of frost days in spring months and an increase of heatwaves, especially in the southern European countries.

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VISCA Insights: Interview with Dr. Ramzi Belkhodja (CIHEAM Zaragoza)

VISCA Insights is a series of short interviews with experts working in agriculture, wine production or climate services. Watch the 1st interview with Dr. Ramzi Belkhodja, Coordinator of Plant Production at CIHEAM Zaragoza discussing the role of climate services in climate change adaptation, and how we can build trust on the prediction of climate services among the agricultural community!

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VISCA at the 4th European Climate Change Adaptation conference

The European Climate Change Adaptation (ECCA)’s primary objective is to bring leading academics and practitioners together to identify and disseminate adaptation solutions, and explore methods to reduce the risks and impacts of disasters caused by extreme weather events.

On 28-31 May 2019, the 4th ECCA conference took place in Lisbon, Portugal which had a particular attention on identifying the ways that the climate change adaptation and disaster risk reduction communities can learn from each other, and find ways to support the most vulnerable groups and environments in danger from climate change impacts.

 VISCA project was presented by METEOSIM and IRTA during the event!

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VISCA concludes its 2nd General Meeting & Stakeholders’ Workshop

Organised by Mastroberardino and the University of Naples (Department of Agricultural Sciences), VISCA project - which is developing climate services to make the wine industry resilient to climate change - held its 2nd General meeting on 10th-11th December 2018 followed by the 2nd Stakeholders Workshop on 12th December 2018 in the premises of Mastroberardino and the Department of Agriculture – Università degli Studi di Napoli Federico II who are part of our consortium.

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This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 730253.