terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Effect on the grape and wine characteristics of cv. Tempranillo at 3 production levels

Effect on the grape and wine characteristics of cv. Tempranillo at 3 production levels

Abstract

The vineyard has experienced a general increase in yields mainly due to the elevated use of technology which caused a quality loss of grapes in more than one case. A large percentage of the Spanish vineyard is covered by a Denomination of Origin which limits the productive level of the vineyards as one of its regulations. The maximum production limit is a variable characteristic of each vineyard and is not usually regulated by agronomic criteria, and this explains the fact that each vineyard can reach high quality with a totally different yield from that set by the Denomination of Origin.

This study aims to evaluate the effect of three different and theoretical production levels on the grape and wine quality during the years 2020, 2021 and 2022.  For this, an early yield estimation method (in fruit set) has been used, and subsequent productive adjustment at the beginning of veraison to 5000 Kg. ha-1, 7000 Kg. ha-1 and 9000 Kg. ha-1 in a Tempranillo variety’s vineyard under the Denomination of Origin Ribera del Duero.

The results show that the production level adjustment methodology is quite accurate, with few differences noticed between the theoretical estimated yield and the actually obtained. On one hand, the parameters that define the grape’s composition are very similar among the three productive levels studied. However, the wine quality witness some statistically significant differences in the phenolic composition and colour. In the same way, the organoleptic analysis has shown different wine profiles during the years of study. The wines from the different yields have not been valued by the consumer tasting panel in a linear way according to the crop load.

Acknowledgements: Thanks to the financial support of the Junta de Castilla y León (Spain), ITACyL, and the VISOSTEC project (FEADER funds). The authors thank the Solterra Wine Company for its contribution by their helpful in the vineyard operations and the grapes.

DOI:

Publication date: October 9, 2023

Issue: ICGWS 2023

Type: Poster

Authors

Barajas1, S. Vélez2, M. Bueno1, A. Martín1, J.A. Rubio1, D. Ruano-Rosa3 and S. Pérez-Magariño1

1 Instituto Tecnológico Agrario de Castilla y León (ITACyL). Valladolid, España.
2 Information Technology Group. Wageningen University & Research (WUR). Wageningen. Gelderland. Netherlands.
3 Instituto Andaluz de Investigación y Formación Agraria y Pesquera (IFAPA-Las Torres). Sevilla. España.

Contact the author*

Keywords

cluster thinning, crop load, consumer tasting panel, organoleptic tasting

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

What to do to solve the riddle of vine rootstock induced drought tolerance

Climate change will increase the frequency of water deficit situation in some European regions, by the increase of the evapotranspiration and the reduction of rainfalls during the growing cycle. This requires finding ways of adaptation, including the use of plant material which is more tolerant to drought. In addition to the varieties used as scions that result in the typicality of wines, rootstocks constitute a relevant way of adaptation to more stressful environmental conditions.

Retrospective analysis of our knowledge regarding the genetics of relevant traits for rootstock breeding 

Rootstocks were the first sustainable and environmentally friendly strategy to cope with a major threat for Vitis vinifera cultivation. In addition to providing Phylloxera resistance, they play an important role in protecting against other soil-borne pests, such as nematodes, and in adapting V. vinifera to limiting abiotic conditions. Today viticulture has to adapt to ongoing climate change whilst simultaneously reducing its environmental impact. In this context, rootstocks are a central element in the development of agro-ecological practices that increase adaptive potential with low external inputs. Despite the apparent diversity of the Vitis genus, only few rootstock varieties are used worldwide and most of them have a very narrow genetic background. This means that there is considerable scope to breed new, improved rootstocks to adapt viticulture for the future.

Pre-breeding for developing heat stress resilient grape varieties to ensure yield 

Climate change has numerous detrimental consequences and creates new challenges for viticulture around the world. Transitory or constant high temperatures frequently associated with an excess of sunlight (UV) can cause a variety of physiological disorders, such as sunburn. Diverse environmental factors and the plant’s response mechanisms to stress determine the symptoms. Grapevine berry sunburn leads to a drastic reduction in yield, and may eventually decline berry quality. Consequently, this poses a significant risk to the winegrowers.

Effect of drought on grapevine wood fungal pathogen communities using a metatranscriptomics approach

Crops are facing increasing biotic and abiotic stress pressures due to global changes. However, trade-off mechanisms between these stresses and the underlying physiological processes are still poorly understood, especially in perennial crop species. To better understand these trade-offs, we studied the effect of drought on grapevine (Vitis vinifera) physiology and esca-related wood fungal communities. Esca is a vascular disease caused by a community of wood-infecting pathogenic fungi, and characterized by trunk necrosis, leaf scorch symptoms, yield losses, and mortality.

Organic mulches slightly influence wine phenolic composition and sensorial properties

Grapevines have traditionally been grown in semi-arid areas, but viticulture is now compromised by climate change. Therefore, it is necessary to implement environmentally friendly viticulture practices to adapt grapevines to current climatic conditions. In this context, organic mulches offer many benefits, such as reduced soil erosion and increased organic matter, soil water content and crop productivity. However, these practices must not compromise grape and wine quality. Therefore, the objective of this study was to evaluate the effect on wine physicochemical and phenolic composition and sensorial properties of different soil management practices on the vine row. Over four years, five soil treatments were examined in two different vineyards.