GiESCO 2019 banner
IVES 9 IVES Conference Series 9 GiESCO 9 GiESCO 2019 9 Effect of kaolin foliar application on grape cultivar Assyrtiko (Vitis vinifera L.) under vineyard conditions

Effect of kaolin foliar application on grape cultivar Assyrtiko (Vitis vinifera L.) under vineyard conditions

Abstract

Context and purpose of the study – In the context of climate change and for the sustainable exploitation of Mediterranean vineyards, it is necessary to use new strategies to adapt to the new climatic conditions. High temperatures and radiation along with the increasing CO2 concentration in the atmosphere affect the maturity process, the technological maturity, as well as the physiology of the grapevine. The aim of the present study was to investigate the effects of kaolin foliar application on water relations, photosynthesis and berry composition of grape cultivar Assyrtiko, under drought conditions in Santorini and with two different training systems. 

Material and methods – The experiment took place in the cultivation season 2017-2018 in Santorini. There were two vineyards, one with the traditional training system of Santorini ‘kouloures’, and one with a unilateral Guyot training system, on vines of grape cultivar Assyrtiko. In both vineyards, there were vines that underwent kaolin application and control vines.  

Results – The use of kaolin reduced the leaf temperature in both training systems by 6.2 % for the unilateral Guyot system and by 6.9% for the traditional system. Chlorophyll concentration was higher after kaolin application for both training systems. Regarding the water potential, the kaolin application reduced water stress in both training systems, with significant difference observed in the unilateral Guyot system. Vine transpiration did not present statistically significant difference after the kaolin application. The photosynthesis of the vines after kaolin application was lower in comparison with the control vines, while in the case of stomatal conductance, there were no statistically significant differences observed. Kaolin delayed the maturation of the grapes in the case of the traditional training system. Water use efficiency was lower in the treatments with kaolin application compared to control vines. Regarding the other mechanical properties of the grapes and analyses of the must, there were no significant differences observed between the treatments. Therefore, the application of kaolin can be an effective and economical solution for the water saving of the vines in dry conditions, while at the same time it can improve the physiology of the plant and preserve the qualitative and quantitative characters of the grapes

Download the PDF

DOI:

Publication date: June 18, 2020

Issue: GiESCO 2019

Type: Poster

Authors

Eustratios Guillaume XYRAFIS1, Maritina STAVRAKAKI1, Ioannis DASKALAKIS1, Konstantinos TELLIS2, Despoina BOUZA1, Katerina BINIARI1*

(1) Laboratory of Viticulture, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece
(2) Domaine Sigalas, Baxes, Oia Santorini 84702, Santorini, Greece

Contact the author

Keywords

Kaolin, Santorini, Vitis vinifera L., water stress, water use efficiency

Tags

GiESCO | GiESCO 2019 | IVES Conference Series

Citation

Related articles…

Service crop effects on grapevine water and nitrogen status and yield under Mediterranean climate

Service crops in vineyard can provide multiple ecosystem services but they can also lead to competition with the grapevine for soil resources in the Mediterranean region due to potential severe droughts (Garcia et al., 2018). One of the levers of action to manage this competition is the choice of species adapted in terms of growth dynamics and water and nutrients’ needs. The objectives of this study were to determine the effect of temporary service crops on grapevine water and nitrogen status and grapevine yield and yield components in a Mediterranean vineyard.
Read More

How to develop strategies of adaptation to climate change based on a foresight exercise?

Prospective studies raise a real intellectual interest for those who contribute to them or take cognizance of it. But they are often considered too difficult to operationalize

Read More

Assessing bunch architecture for grapevine yield forecasting by image analysis

It is fundamental for wineries to know the potential yield of their vineyards as soon as possible for future planning of winery logistics. As such, non-invasive image-based methods are being investigated for early yield prediction. Many of these techniques have limitations that make it difficult to implement for practical use commercially. The aim of this study was to assess whether yield can be estimated using images taken in-field with a smartphone at different phenological stages. The accuracy of the method for predicting bunch weight at different phenological stages was assessed for seven different varieties.

Read More

A few observations on double sigmoid fruit growth

Many fleshy fruit, including the grape berry, exhibit a double‐sigmoid growth (DSG) pattern. Identification of the curious DSG habit has long been attributed to Connors’ (1919) work with peaches

Read More

Aromatic profile of six different clones of Chardonnay grape berries in Minas Gerais (Brazil)

Aromas are one of the key points in food analysis since they are related to character, quality and consequently consumer acceptance. It is not different in the winery industry, where the aromatic profile is a combination of viticultural and oenological practices. Based on the development of more aromatic clones and on the potential to produce sparkling wines at Caldas, in the southern region of Minas Gerais (Brazil) (21°55´S and 46°23´W, altitude 1,100m), the aim of this work was the determination of volatile compounds in six different clones of Chardonnay grape berries to better understand which compounds add bouquet to the wine, and additionally comprehend the impacts of the edaphoclimatic and annual conditions on the improvement of grape-growing and winemaking practices.

Read More