GiESCO 2019 banner
IVES 9 IVES Conference Series 9 GiESCO 9 Assessing reserve nitrogen at dormancy for predicting spring nitrogen status in Chardonnay grapevines

Assessing reserve nitrogen at dormancy for predicting spring nitrogen status in Chardonnay grapevines

Abstract

Context and purpose of the study – Nitrogen (N) supply strongly influences vine productivity and berry composition, matching availability and uptake requirements of vines during the growing season is essential to optimize vine nutrition. The nutritional status of grapevines is commonly assessed by the determination of petiole nutrient concentrations at flowering. The reserve N could also be an earlier indicator for grapevine N status, this work aimed to assess how the petiole levels relate to these perennial N reserves.

Material and methods – Five Chardonnay vineyards were planted two years prior and one Riverina vineyard 10 years prior to study commencement. The N levels in various perennial tissues and in the petioles at flowering were determined in these vineyards; vine productivity and berry ripeness were also assessed.

Results – The application of N fertiliser generally increased petiole N levels at bloom, the winter N reserves in root and spur tissues had a strong relationship with spring N status. A spur N concentration between 0.3 to 0.4 % and root N concentrations of 1.0 % relating to the lower value of the adequate range in the petiole at flowering (0.8 %). The determination of root and spur N during dormancy could assist in assessing N status, allowing for adjustment of N supply earlier in the season, prior to petiole levels at flowering are determined. However, it would be expected that the uptake between burst and flowering will alter petiole levels, which would be influenced by N fertiliser applications and by soil processes that are influenced by soil temperature and moisture.

DOI:

Publication date: March 11, 2024

Issue: GiESCO 2019

Type: Poster

Authors

Bruno HOLZAPFEL1 ,2* and Jason SMITH1

1 National Wine and Grape Industry Centre, Wagga Wagga, New South Wales 2678, Australia
2 New South Wales Department of Primary Industries, Wagga Wagga, New South Wales 2678, Australia

Contact the author

Keywords

Nutrient status, nitrogen, requirements, reserves

Tags

GiESCO | GiESCO 2019 | IVES Conference Series

Citation

Related articles…

Zoning, environment, and landscape: historic and perspective

Dans une approche globale, nous proposons la définition suivante du zonage : “représentation cartographique associée à une sectorisation du territoire en zones unitaires homogènes à partir de facteurs discriminants établis sur la base d’indicateurs quantifiables et d’avis d’experts”. La première application de cette méthode a porté sur la caractérisation du terroir en liaison avec les aspects qualitatifs des vins. Il est également possible d’envisager d’appliquer cette démarche dans les stratégies environnementales et paysagères liées aux approches territoriales et aux pratiques viticoles. Cette méthode peut servir de base dans la mise en œuvre des outils financiers associés aux mesures environnementales (CTE, aides spécifiques).

Precision viticultural strategy for managing intra-vineyard variability in grape aroma using UAV-based vigour indices

In several cultivars, such as Gewürztraminer and Riesling, grape and wine aromas are determined by volatile terpenoids.

Historical terraced vineyards – heritage and nature conservation strategies

Historical terrace vineyards are simultaneously impressive documents of the human inclination to design, sites for the production of high quality wines and habitats for a rich variety of flora and fauna

Incidence de la nature du sol et du cépage sur la maturation du raisin, à Saint Emilion, en 1995

The AOC Saint-Emilion, one of the most prestigious in Bordeaux, is located on the right bank of the Dordogne upstream from Libourne. The vineyard is planted on Tertiary (Oligocene) and Quaternary geological formations, on which very varied soils have developed. Numerous studies have taken account of this heterogeneity and made it possible to better understand the functioning and viticultural potential of these soils (Duteau et al. 1981, Van Leeuwen, 1991).

Terroir and precision viticulture: are they compatible?

The concept of terroir or sense of place is almost as old as the wine industry. It is generally used as an all-encompassing term to reflect the effects of the biophysical environment in which grapes and their resultant wines are produced on the character of those wines. Historically, terroir has generally been considered at the regional or property scale.