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Different vineyard management practices: agronomic responses and consequences on must quality

Cocco, Massimiliano (2020) Different vineyard management practices: agronomic responses and consequences on must quality. Doctoral Thesis.

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Abstract

Background and Aims
Global warming has repercussions on vine phenology and physiology, with consequences affecting yield and berry composition. In order to counteract negative effects, it is necessary to improve the knowledge on genetic aspects as well as vineyard management.
The aim of this study was to evaluate the responses of different Vitis genotypes to several agronomic practices, such as water management, the application of exogenous abscisic acid (ABA) as well as leaf removal, all of which influence the ripening process.
Methods and Results
Two experiments were carried out. In the first one, conducted in Sardinia (Italy), different strategies of water stress and exogenous ABA application were tested on three red grapevine cultivars. In the second trial, carried out in Australia, a leaf removal treatment, performed post-veraison, was compared with no defoliation treatment on two grapevine cultivars.
Conclusions
Water stress response is cultivar-dependent. No significant effect or interactions were observed by applying exogenous ABA.
Leaf defoliation above the bunch zone reduced sugar accumulation rate in the berries, causing a delay in harvest of 24 days, although observed only in one of the two investigated varieties.
Significant of study
This study points out the importance of the deep knowledge of the genetic background of each specific cultivar, highlighting how the different cultivation techniques can play a fundamental role in influencing the berry maturation.

Item Type:Doctoral Thesis
ID Code:11975
Contributors:Mercenaro, Luca
Publisher:Universita' degli studi di Sassari
Uncontrolled Keywords:Sardinia, Grapevine, Water stress, ABA, Defoliation, Must composition
Subjects:Area 07 - Scienze agrarie e veterinarie > AGR/02 Agronomia e coltivazioni erbacee
Divisions:001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Agraria
Cicli, scuole e corsi:Ciclo 31 > Scienze agrarie > Produttività delle piante coltivate
Deposited On:19 Apr 2019 13:24

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