terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Cover crop management and termination timing have different effects on the maturation and water potentials of Glera (Vitis vinifera L.) in Friuli-Venezia Giulia

Cover crop management and termination timing have different effects on the maturation and water potentials of Glera (Vitis vinifera L.) in Friuli-Venezia Giulia

Abstract

Inter-row soil tillage in vineyards, stimulates vigor and production due to the absence of competition for water and nutrients, however negatively affects organic matter content, soil erosion, and compaction, resulting in reduced fertility. In this study, we investigated the effects of different cover crop management approaches, including cultivation type and termination timing, on the physiological and productive responses of a Glera vineyard.

The experimental trial was conducted in Precenicco (UD) from 2019 to 2021. A commercial mixture for autumn cover cropping was sown in alternating rows, and the sowing pattern was changed each year. Four cover crop management treatments were tested: buried cover crop (T) and only shredded (S), combined with two treatment timings: early (E) and late treatment (L).

During the 2020-2021 seasons, data of stem water potential, maturation curves, productivity, and soil biological characteristics were collected during the summer and at harvest.

The treatments did not have a significant effect on grapevine production in terms of bunch number, production per plant, and average bunch weight. However, the treatment tilled late (TL) showed higher concentrations of titratable acidity, lower concentrations of soluble sugars and pH compared to the other treatments. Furthermore, the same  significantly increased the values of soil microbial metabolic quotient (qCO2) compared to the other treatments.

The termination timing had a noticeable effect on the T treatments in terms of stem water potential. TL exhibited the highest stem water potential, whereas the TE treatment had the lowest values. Additionally, these two treatments displayed the most contrasting trends in terms of stem water potential. These findings suggest that termination timing had a more pronounced impact on tilled soils compared to shredded soils.

DOI:

Publication date: October 10, 2023

Issue: ICGWS 2023

Type: Poster

Authors

Mirko Sodini1*, Alessandro Pichierri1,2, Alberto Calderan1,2, Riccardo Braidotti1, Claudio Mondini5, Paolo Sivilotti1

1 Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine,Via Delle Scienze 206, 33100 Udine, Italy
2 Department of Life Sciences, University of Trieste, via L. Giorgieri 10, 34127, Trieste, Italy3 CREA Research Centre for Vitiaculture and Enology, branch of Gorizia, via Trieste 23, I-34170 Gorizia, Italy

Contact the author*

Keywords

stem water potential, cover crops, soil management, Glera

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

Aroma characterization of mold resistant base wines for sparkling wine produced in a warm-temperate area at two different altitudes

In a recent context where consumers pay an increasing attention to sustainability and eco-friendly aspects in the decision-making process, the use of the resistant varieties in the wine sector have returned to the attention. In this context, the use of mould-resistant grape varieties would be an opportunity for sparkling wine producers as it can reduced the pesticide utilization in grape management and hence production costs.
However, the use of the resistant varieties to produce the base wine may be strongly influenced due to its requirements for a particular balance between sugars and acidity to ensure the quality of the final product. In addition, the aromatic profile of base wine plays a crucial role in the perception of the quality of the sparkling wine.

Typicality of Rioja wines: identification of sensory profiles for the three subregions of DOCa Rioja

Within the DOCa Rioja three main production areas are differentiated: Rioja Alta (RA), Rioja Alavesa (RAv) and Rioja Oriental (RO). They are three diverse territories with particular characteristics that are claimed to give rise to differentiated profiles. The present work aims at evaluating the sensory diversity of young commercial red wines in these three subregions. Therefore 30 young red wines (mainly Tempranillo and vintage 2021), ten from each subregion, were sensory described following a non-verbal free sorting task and a verbal free comment task by 32 well-established Rioja winemakers.

Stomatal abundance in grapevine: developmental genes, genotypic variation, and physiology

Grapevine cultivation is threatened by the global warming, which combines high temperatures and reduced rainfall, impacting in wine quality and even plant survival. Breeding for varieties resilient to these challenges must address plant traits such as tolerance to supraoptimal temperatures and optimized water use efficiency while minimizing productivity and quality losses. Stomatal abundance (SA) determines the maximum leaf potential for transpiration and thus water loss and cooling. Since SA results from a developmental process during leaf emergence and growth, knowledge on the genetic control of this process would provide specific targets for modification.

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.

Survey of pesticide residues in vineyard soils from the Denomination of Origin Ribeiro

Vineyards from mild temperature, high humidity locations receive often treatments with fungicides to prevent damages produced by fungi responsible for mildium, oidium and botrytis infections. In addition, insecticides are also applied to vineyards to fight again pests, which affect directly, or indirectly (as vectors of different diseases), their productivity. A fraction of the above compounds reaches the soil of vineyards, either during application, or when released from the canopy of vines due to rain-wash-off. Thereafter, depending on soil conditions (pH, organic matter) and environmental variables (regimen of rain, slope of vineyards), they might persist in this compartment, be degraded and/or transferred to water masses, modifying the biodiversity of soils and/or affecting the quality of water reservoirs.