terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Agronomic behavior of three grape varieties in different planting density and irrigation treatments

Agronomic behavior of three grape varieties in different planting density and irrigation treatments

Abstract

In the O Ribeiro Denomination of Origin, there is a winemaking tradition of growing vines under a high-density plantation framework (8,920 vines/ha) and maintaining its vegetative cycle under rainfed conditions.

Currently, viticulture is advancing to plantation frames in which the density is considered medium (5,555 vines/ha), thus allowing mechanized work to be carried out for vineyard management operations. Although, the application of irrigation applied proportionally to the needs of the vegetative cycle of the vine, is a factor that increasingly helps a good development of the vine compared to the summer period, with increasingly uncertain weather forecasts.

For this reason, the main objective of this work is the agronomic evaluation of three grape varieties, with both planting densities (medium and high), with irrigation (deficit irrigation – 30% ETo) and rainfed treatments, with four replications (seven vines) which allow to determine possible differences in parameters of production and quality.

The plot under study is framed under the Denomination of Origin of O Ribeiro, belonging to the viticulture and oenology station of Galicia (Leiro, Ourense).

The study was carried out in the 2021 and 2022 seasons over two red varieties (Mencia and Sousón) and the most representative white variety of the region, Treixadura.

With the results obtained, it has been possible to observe significant differences performed with a statistical test ANOVA, between irrigation treatments when were evaluated the production parameters, obtaining a higher production per vine and number of clusters when irrigation is applied and when it is in the medium density plantation framework in the three grape varieties studied. Regarding the differences observed between vineyard planting frames, significant differences have been observed in Mencia and Treixadura grape varieties, favoring in both cases the medium density planting frame, with which it has been obtained a greater production of grapes with a greater number of clusters per plant.

Regarding quality parameters, density and irrigation treatments have significant differences in terms of malic acid content in the high planting density.

As conclusions, it has been possible to observe how in none of the varieties, the quality parameters are affected when the vineyard was in a plantation framework in which a mechanized an comfortable work of the vineyard is allowed, compared to the plantation framework of traditional area.

DOI:

Publication date: October 10, 2023

Issue: ICGWS 2023

Type: Poster

Authors

Rodríguez-Febereiro M1*, Fandiño M1, Abarquero E2, Cancela J.J1, Díaz-Losada E2

1GI-1716-Universidad de Santiago de Compostela, Escuela Politécnica Superior de Ingeniería, Rúa Benigno Ledo s/n 27002, Lugo, España.
2Estación de Viticultura e Enoloxía de Galicia (AGACAL_EVEGA). Ponte San Clodio s/n, 32428, Leiro, Ourense (España).

Contact the author*

Keywords

irrigation, density, Mencia, Sousón, Treixadura

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.

Grape pomace, an active ingredient at the intestinal level: Updated evidence

Grape pomace (GP) is a winemaking by-product particularly rich in (poly)phenols and dietary fiber, which are the main active compounds responsible for its health-promoting effects. GP-derived products have been proposed to manage cardiovascular risk factors, including endothelial dysfunction, inflammation, hypertension, hyperglycemia, and obesity. Studies on the potential impact of GP on gut health are much more recent. However, it is suggested that, to some extent, this activity of GP as a cardiometabolic health-promoting ingredient would begin in the gastrointestinal tract as GP components (i.e., (poly)phenols and fiber) undergo extensive catabolism, mainly by the action of the intestinal microbiota, that gives rise to low-molecular-weight bioactive compounds that can be absorbed and utilized by the body.

Selecting green cover species in the under-trellis zone of Lower Austrian vineyards

The under-trellis zone of vineyards is a sensitive area through which vines cover a significant portion of their nutrient and water needs. Mechanical and chemical methods are applied to suppress competing and tall-growing weeds to ensure optimal vine growth conditions. In addition to higher operating costs and depending on the soil conditions, these practices might lead to a long-term reduction in soil fertility and biodiversity. The presented study aims to analyse the suitability and interspecies competition of a selected green cover mixture of five local herbaceous species as potential green cover mixture in the under-trellis area of Lower Austrian vineyards.

Genetic variation among wild grapes native to Japan

Domesticated grapes are assumed to have originated in the Middle East. However, a considerable number of species are native in East Asian countries such as China, Korea and Japan as well. Evidence suggests that a total of seven species and eight varieties have been found to be native to Japan. A wide level variation in morphology, genetic and fruit composition exist in wild grape native to Japan.

Drought responses of grapevine cultivars under different environments

Using grapevine genetic diversity is one of the strategies to adapt viticulture to climate change. In this sense, assessing the plasticity of cultivars in their responses to environmental conditions is essential. For this purpose, the drought tolerance of Grenache, Tempranillo and Semillon cultivars grafted onto SO4 was evaluated at two experimental vineyards, one located in Valencia (Spain) and the other in Bordeaux (France). This was done by assessing gas exchange parameters, water relations and leaf hydraulic traits at the end of the season.