Terroir 2010 banner
IVES 9 IVES Conference Series 9 Validation of phenological models for grapevine in the Veneto region

Validation of phenological models for grapevine in the Veneto region

Abstract

In this study we have compared the predictive ability of two phenological models: a traditional Thermal Time (TT) and a version of the more recently develop Unified Model (UM). Unlike TT, which quantifies the accumulation of heat units which trigger bud break and the subsequent development phases, the UM describes also the fulfilment of chilling requirements, predicting the date of dormancy break, and implements a finer description of the plant development temperature-dependency. The models were fitted and validated on phenological observations collected from 1986 and 2008 in a site of North-Eastern Italy, on the cultivars Glera, Chardonnay, Merlot and Cabernet Sauvignon. The UM fitted better to observations than TT, and yielded more accurate estimates on the validation dataset. In both models, the accuracy of estimates decreased from bud break to veraison.

Download the PDF

DOI:

Publication date: October 8, 2020

Issue: Terroir 2010

Type: Article

Authors

G. Fila (1), P. Belvini (2), F. Meggio (1), A. Pitacco (1)

(1) University of Padova, Department of Environmental Agronomy and Crop Science I-35020Legnaro (PD), Italy
(2) Centro per l’Educazione la Cooperazione e l’Assistenza Tecnica. I-31033-Castelfranco Veneto (TV),

Contact the author

;

Keywords

Grapevine phenology, modelling

Tags

IVES Conference Series | Terroir 2010

Citation

Related articles…

Hormone metabolism regulates fruit maturation in a slow ripening grape genotype

Context and purpose of the study. Rising temperatures and prolonged heat accelerate berry sugar accumulation in advance of the accumulation of compounds responsible for aroma, colour and mouthfeel.
Read More

Terroir influence on growth, grapes and grenache wines in the AOC priorat, northeast Spain

The Mediterranean climate of The Priorat AOC, situated behind the coastal mountain range of Tarragona, tends towards continentality with very little precipitation during the vegetation cycle. The soil is poor, dry and rocky, largely composed of slate schist, known as “llicorella”. Vines primarily grow on steep slopes and terraces.

Read More

Classification and prediction of tannin botanical origin through voltammetry and machine learning approach

The classification of enological tannins has gained importance following the OIV’s requirement to include their botanical origin on product labels (OIV-OENO624-2022).

Read More

Influenza delle componenti climatiche e pedologiche sulla variabilità dei contenuti polifenolici in alcuni ambienti vitati della DOCG Sagrantino di Montefalco

Obiettivo del progetto è la valutazione dell’influenza climatica e pedologica dell’areale di Montefalco sul vitigno Sagrantino, ponendo particolare attenzione alla componente polifenolica e antocianica. Sono stati quindi messi a confronto, a partire dal 2001 fino al 2008, sei differenti zone tutte situate all’interno dell’areale DOCG Sagrantino di Montefalco; per ciascun vigneto alla vendemmia sono state effettuate analisi sui parametri analitici e sul contenuto polifenolico e antocianico delle uve. Ognuna delle sei zone è inoltre stata caratterizzata dal punto di vista pedoclimatico, valutando l’influenza del clima e della tipologia di suolo sui parametri analitici presi in considerazione.

Read More

Chemical and sensory diversity of regional Cabernet-Sauvignon wines

AIM: To investigate chemical and sensory drivers of regional typicity of Cabernet Sauvignon from different geographical regions of Australia.

Read More