Terroir 2020 banner
IVES 9 IVES Conference Series 9 Effect of fungi addition, root preparation, and other factors on the success of vine replacement in an established vineyard

Effect of fungi addition, root preparation, and other factors on the success of vine replacement in an established vineyard

Abstract

Dead or dying vines must be replaced regularly in order to ensure the sustainability of a vineyard. Successful plant replacement is crucial to maintain yield and quality by encouraging balanced root and leaf development in vines. However, young vines planted within an established vineyard encounter several problems, ranging from poor soil conditions to competition with older vines with well-established root systems.  

Aim: The aim of this project is to study the impact of plant material and plant replacement practices, including the addition of microorganisms.

Methods and Results: Three trials were set up in the Médoc region, north of Bordeaux. The first trial had four modalities in which two rootstocks, previously inoculated with arbuscular mycorrhizal fungi (AMF) or not, were planted in April 2019. The second trial was designed to study the influence of root preparation (bare roots versus balled roots) and the period of replacement of the plants, while the third trial, set up in 2018, crossed the modalities of the root preparation and mycorrhization. Measurements of plant recovery rate, nitrogen status of the leaves and development of shoots were carried out.

In the first trial, the mycorrhization of the plants did not reveal differences in terms of recovery. It did not induce a better development of the shoots or differences in nitrogen status in leaves. In contrast, the other mycorrhizal trial found shoots from mycorrhized plants had better growth, although this result was not confirmed in the second year. The two trials addressing root preparation found that plants with balled roots had better shoot growth and nitrogen status compared to bare rooted plants. However, these results are moderated by other parameters of the trials such as planting period, soil maintenance practices or choice of the rootstock.

Conclusions: 

These results are a first step to understand the effect of fungi addition and root preparation on success of vine replacement. To conclude on the interest of balled plants or mycorrhization, these measures on development and production should be continued until the first years of grape production.

DOI:

Publication date: March 25, 2021

Issue: Terroir 2020

Type : Video

Authors

Coralie Dewasme Laveau1*, Séverine Mary2, Anne Janoueix1, Virginie Lauvergeat1

1 University of Bordeaux, INRAE, Bordeaux Sciences Agro, EGFV, UMR1287, F-33140, Villenave d’Ornon, France
2 Vitinnov, University of Bordeaux, Bordeaux Sciences Agro, ISVV, 1 cours du Général de Gaulle, Gradignan, France

Contact the author

Keywords

Mycorrhization, rootstock, planting practices, shoots growth

Tags

IVES Conference Series | Terroir 2020

Citation

Related articles…

Physiological and growth reaction of Shiraz/101-14 Mgt to row orientation and soil water status

Advanced knowledge on grapevine row orientation is required to improve establishment, management and outcomes of vineyards on terroirs with different environmental conditions (climate, soil, topography) and in view of a future change to more extreme climatic conditions. The purpose of this study was to determine the combined effect of row orientation, plant water status and ripeness level on the physiological and viticultural reaction of Shiraz/101-14 Mgt.

Effects of mechanical leafing and deficit irrigation on Cabernet Sauvignon grown in warm climate of California

San Joaquin Valley accounts for 40% of wine grape acreage and produces 70% of wine grape in California. Fruit quality is one of most important factors which impact the economical sustainability of farming wine grapes in this region. Due to the recent drought and expected labor cost increase, the wine industry is thrilled to understand how to improve fruit quality while maintaining the yield with less water and labor input. The present study aims to study the interactive effects of mechanical leafing and deficit irrigation on yield and berry compositions of Cabernet Sauvignon grown in warm climate of California.

The effects of cane girdling on berry texture properties and the concentration of some aroma compounds in three table grape cultivars

The marketability of the table grapes is highly influenced by the consumer demand; therefore the market value of the table grapes is mainly characterized by its berry size, colour, taste and texture. Girdling could cause accumulation of several components in plants above the ringing of the phloem including clusters and resulting improved maturity. The aim of the experiments was to examine the effect of girdling on berry texture characteristics and aroma concentration.

Application of a fluorescence-based method to evaluate the ripening process and quality of Pinot Blanc grape

The chemical composition of grape berries at harvest is one of the most important factors that should be considered to produce high quality wines. Among the different chemical classes which characterize the grape juice, the polyphenolic compound, such as flavonoids, contribute to the final taste and color of wines. Recently, an innovative non-destructive method, based on chlorophyll fluorescence, was developed to estimate the phenolic maturity of red grape varieties through the evaluation of anthocyanins accumulated in the berry skin. To date, only few data are available about the application of this method on white grape varieties.

Different yield regulation strategies in semi-minimal-pruned hedge (SMPH) and impact on bunch architecture

Yields in the novel viticulture training system Semi-Minimal-Pruned Hedge (SMPH) are generally higher compared to the traditional Vertical Shoot Positioning (VSP). Excessive yields have a negative impact on the vine and wine quality, which can result in substantial losses in yield in subsequent vintages (alternate bearing) or penalties in fruit quality. Therefore yield regulation is essential. The bunch architecture in SMPH differs from VSP. Generally there is a higher amount but smaller bunches with lower single berry weights in SMPH compared to VSP.