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…

Grape composition and wine quality of Muscat Hamburg cultivar after a specific inactivated dry yeast application as adaptation strategy to climate change

In a climate change context, the management of Mediterranean vineyards should be adapted to the new environmental conditions. Predictive models underline that in the future the most of the Mediterranean vineyard regions is expected to experience further warming events producing challenges in ripening balanced fruit. It is already registered that in warm and dry summers, the ripening process is faster and the balance between phenolic and technological (sugar) maturity may not be the desirable. This study investigates the use of specific inactivated yeast derivatives sprayed on the entire canopies of field grown cv Muscat Hamburg vines.
Read More

Soil preparation practices to eliminate soil restrictions to grapevine root distribution for the establishment of sustainable vineyards

Grapevine yield and wine quality are dependent on good quality vegetative growth and root development. Soils that restrict proper grapevine root development, together with the high cost of establishing a new vineyard, require effective soil preparation to sustain productive vineyards for 25 years. This study reviews soil preparation research conducted over the past 50 years and identifies best practices to remove soil physical and chemical impediments to create optimum conditions for root growth.

Read More

Root development and the performance of grapevines in response to natural as well as man‐made soil impediments

The majority of soils used for wine and table grape production in South Africa are notoriously shallow, i.e. they are restricting root penetration.

Read More

Optical visualization of embolism spread in drought‐induced leaves: revealing differences across three grapevine genotypes

‐Evaluation of xylem embolism is an important challenge in identifying drought tolerant genotypes within the context of climate change.

Read More

First company results and for the territory on the application of the “bio-Métaéthique 4.1c” in italy. Cultural, socio-economic, technical and productive aspects

[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