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…

Forcing vine regrowth in Vitis vinifera cv. Touriga nacional at Douro region

[lwp_divi_breadcrumbs home_text="IVES" use_before_icon="on" before_icon="||divi||400" module_id="publication-ariane" _builder_version="4.20.4" _module_preset="default" module_text_align="center" module_font_size="16px" text_orientation="center"...
Read More

Seasonal vine nutrient dynamics and distribution of shiraz grapevines

The nutrient reserves in the grapevine perennial structure perform a critical role in supplying the grapevine with nutrients
Read More

Bio‐metaethics viticulture proposed by the Giesco. Direct charter with producers. Example of evaluation of training systems

The key points of the current GiESCO charter ‘BIO‐MetaEthics’ are exposed. The new development in cooperation with Giovanni Cargnello is to apply the principles and the content into the practice by establishing a direct contract with producers and other actors of the wine sector. An evaluation sheet is proposed and tested in a new advanced vineyard. For illustrating the methodology of evaluation, the example of the choice of the training systems is detailed on a wide range of situations. 

Read More

Influence of planting stock and training strategy on the development and productivity of Pinot noir grapevines

For cool windy climates and/or lower vigor site situations delays in vine development during vine establishment can result in a greater number of growing seasons to achieve full yield potential. Plant material and training strategies utilized are critical factors in promoting vine development and production that is appropriate to the site conditions. The objective of this study was to evaluate nursery planting stock and training strategies for their potential to achieved advanced vine development and yield.

Read More

Assessing macro-elements contents in vine leaves and grape berries of Vitis vinifera using near-infrared spectroscopy coupled with chemometrics

The cultivated vine (Vitis vinifera) is the main species cultivated in the world to make wine. In 2017, the world wine market represents 29 billion euros in exports, and France contributes 8.2 billion (28%) to this trade, making it a traditional market of strategic importance. Viticulture is therefore a key sector of the French agricultural economy. It is in this context that the nutritional diagnosis of the vine is of real strategic interest to winegrowers. Indeed, the fertilization of the vine is a tool for the winegrower that allows him to influence and regulate the quality of the wine.

Read More