terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Reduction of the height of the canopy in fruit set and in pea size: vegetative, productive and maturation effects, in cv. Verdejo

Reduction of the height of the canopy in fruit set and in pea size: vegetative, productive and maturation effects, in cv. Verdejo

Abstract

Global warming is accelerating the technological ripening of the grape, with a loss of acidity, which requires that vineyard management can delay ripening to avoid it. The source-sink relation is essential for grape ripening, since it affects the distribution of photosynthates and substances derived from plant metabolism. A work is proposed to know the response of the vineyard to the drastic reduction of the foliar surface by trim down the shoots in cv. Verdejo. In 2020, in Valladolid, the height reduction of the canopy was studied according to treatments: T (control), without reduction; Rj (reduction in fruit set -j-), trim to half the length of all shoots; Rk1 (reduction in pea size -k-), similar to Rj; Rk2 (reduction + lateral leaflessness, in -k-). Trim was made by hand respecting a height of trellis vegetation of 60 cm. The experiment was designed in 4 random blocks, with an elemental plot of 12 control vines, in a bilateral Royat cordon. The reduction of vegetation did not significantly affect grape production, producing a decrease between 8% and 4%, but significantly reduced pruning wood, between 25% and 16%, due to a decrease in shoot weight. In the campaign after the reduction, 2021, neither the grape production nor the vegetative development were affected. The composition of the grape in 2020 was hardly affected by the reduction, since the harvest only had to be delayed up to five days to reach the same concentration of sugars as in the control vines.

The pH, total acidity and malic acid of grapes did not show notable changes, while tartaric acid was significantly favored and potassium increased slightly. Probably, the relatively low production level did not prevent a fairly normal development of the grape ripening, despite the drastic reduction in the leaves-clusters ratio.

Acknowledgements: PID2019-105039RR-C42 project (MCIN/AEI) and Junta de Castilla y León

DOI:

Publication date: October 3, 2023

Issue: ICGWS 2023

Type: Article

Authors

J. Yuste1, D. Martínez-Porro1

1Instituto Tecnológico Agrario de Castilla y León, 47071 Valladolid (Spain)

Contact the author*

Keywords

acidity, grapes, shoot trimming, sugars, vineyard

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

High-throughput sequencing analysis based on nematode indices revealed healthier soils of organic vineyards 

Proper soil health assessments are crucial for sustainable cropland. Among the widely employed approaches, evaluating nematode community structure is particularly suitable. Traditionally, the taxonomic characterization of soil nematodes has relied on time-consuming morphology-based methods requiring experienced experts. However, molecular tools like high-throughput sequencing have emerged as efficient alternatives. In this study, we performed a metataxonomic analysis of soil samples collected from 57 vineyards in the DOCa Rioja region of Northern Spain, focusing on the impact of organic viticulture and cover cropping compared to integrated pest management (IPM) and tilling practices.

Read More

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.

Read More

Uncovering the interplay between Copper and SO2 tolerance in Saccharomyces cerevisiae

[lwp_divi_breadcrumbs home_text="IVES" use_before_icon="on" before_icon="||divi||400" module_id="publication-ariane" _builder_version="4.20.4" _module_preset="default" module_text_align="center" module_font_size="16px" text_orientation="center"...
Read More

Effect of rising atmospheric CO2 levels on grapevine yield and composition by the middle of the 21st century: what can we learn from the VineyardFACE?

Atmospheric CO2 levels have been rising continuously since the industrial revolution, affecting crop physiology, yield and quality of harvest products, and grapevine is no exception [1]. Most of previously reported studies used potted plants in controlled environments, and explored grapevine response to relatively high CO2 levels, 700 ppm or more. The vineyardFACE, established in Geisenheim in 2012, uses a free air carbon dioxide enrichment (FACE) system to simulate a moderate (ambient +20%) increase in atmospheric CO2 in a vineyard planted with cvs. Cabernet-Sauvignon and Riesling grafted on rootstock 161-49 Couderc and SO4, respectively.

Read More

The influence of pre-heatwave leaf removal on leaf physiology and berry development

Due to climate change, the occurrence of heatwaves and drought events is increasing, with significant impact on viticulture. Common ways to adapt viticulture to a changing climate include site selection, genotype selection, irrigation management and canopy management. The latter mentioned being for instance source-sink manipulations, such as leaf removal, with the aim to delay ripening.

Read More