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.

Download the PDF

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…

Do high temperature extremes impact berry tannin composition?

Flavonoids, including flavonols, anthocyanins, and tannins, are important contributors to grape and wine quality, and their biosynthesis is strongly influenced by bunch microclimate.

Read More

Report on the work carried out by the zoning group of the O.I.V.

La création officielle du groupe Experts Zonage Vitivinicole à l’O.I.V., qui s’inscrit dans la Commission Viticulture, est récente. Le Professeur Mario FREGONI en assure la présidence depuis 1998, assisté du vice-président et du secrétaire général Mario FALCETTI. Ils ont été confirmés dans leurs fonctions lors des sessions de mars 2001. Actuellement, le groupe d’experts Zonage Vitivinicole de l’O.I.V. se compose de 40 délégués, représentant 18 pays membres. La mise en place de ce groupe a tout d’abord été initiée par l’Instituto Agrario de San Michele (Italie) et l’Unité de Recherches Vigne et Vin du Centre INRA d’Angers (France). Une collaboration entre les chercheurs s’est installée très tôt, dès 1987.

Read More

Comparison of the aroma profile in total and partial dealcoholisation of white and red wines by reverse osmosis

The increasing demand for low-alcohol and non-alcoholic wines has led to the development of advanced dealcoholisation techniques aimed at preserving wine quality while reducing ethanol content. Reverse osmosis is one of the most widely used membrane-based processes for the selective removal of ethanol [1].

Read More

Impact of mycorrhizal inoculation of ‘Monastrell’ grapevines grafted onto different conventional vs. newly breed rootstocks 

Grafting Vitis vinifera L. (wine traditional cultivars) onto North American grapevine species or hybrids is a common practice in viticulture given their tolerance against phylloxera (Daktulosphaira vitifoliae). However, rootstock genetic background affects the response of grapevines to environmental stresses and their ability for establishing a symbiotic relationship with the microbial communities, and more specifically with arbuscular mycorrhizal fungi (AMF).
The aim of this study was to evaluate Monastrell variety (clone ENTAV 369) grafted onto three rootstocks (140Ru, 110R and RG8) characterized by a different genetic background, in combination with AMF inoculation (Rhizophagus irregularis) vs. a non-inoculated control with regards to vegetative growth, leaf gas exchange parameters, and mycorrhization.

Read More

High-throughput screening of physical-mechanical berry skin traits facilitates targeted selection of breeding material with resistance to Botrytis bunch rot and grape sunburn

The ongoing climate change implies an increasing mean air temperature, which is signified by weather extremes or sudden changes between drought and local heavy rainfalls. These changing conditions are especially challenging for the established grapevine varieties growing under cool climate conditions due to an increased risk for fungal diseases like downy mildew (DM) and Botrytis bunch rot (BBR) as well as for grape sunburn. To meet that demand, the scope of most grapevine breeding programs is the selection of mildew fungus-resistant and climatic adapted grapevines with balanced, healthy yield and outstanding wine quality.

Read More