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…

OENOLOGICAL POTENTIAL OF AUTOCHTHONOUS SACCHAROMYCES CEREVISIAE STRAINS AND THEIR EFFECT ON THE PRODUCTION OF TYPICAL SAVATIANO WINES

Due to the global demand for terroir wines, the winemaking industry has focused attention on exploiting the local yeast microflora of each wine growing region to express the regional character and enhance the sensory profile of wines such as varietal typicity and aroma complexity. The objective of the present study was to isolate and compare the indigenous strains of Saccharomyces cerevisiae present in different vineyards in the Mesogeia – Attiki wine region (Greece), evaluate their impact on chemical composition and sensory profile of Savatiano wines and select the most suitable ones for winemaking process.

Read More

Varieties and rootstocks: an important mean for adaptation to terroir

A large genetic diversity exists among V. vinifera varieties, but also among cultivated rootstocks. This diversity is important to adapt plant material to different environmental conditions

Read More

Comparative proteomic analysis of wines made from Botrytis cinerea infected and healthy grapes reveal interesting parallels to the gushing phenomenon in sparkling wine

In addition to aroma compounds also protein composition strongly influences the quality of wines. Proteins of wine derive mainly from the plant Vitis vinifera and may be influenced by abiotic stress as well as fermentation conditions or fining. Additionally, fungal infections can affect the protein content as well by introducing fungal proteins or affecting grape protein composition. An infection of the vine with the plant pathogenic fungus Botrytis (B.) cinerea was shown to cause a degradation of proteins in the resulting wine. Moreover, it influences the foaming properties in sparkling wine.

Read More

Sheep manure: An effective regenerative practice for enhancing Plavac Mali (Vitis vinifera L.) wine quality in dry-farming vineyards on Hvar island

There is an urgent need to develop protective measures for grapevines in historically significant dry-farming vineyards, particularly on Mediterranean islands.

Read More

Identification of arbuscular mycorrhizal fungi species preferentially associated with grapevine roots inoculated with commercial bioinoculants 

Arbuscular mycorrhizal fungi (AMF) form symbiotic associations with plant roots and can help plants acquire nutrients from the soil in exchange for photosynthetic carbon. Commercial bioinoculants containing AMF are widely available and represent a potential opportunity to reduce the dependence of grapevines on agrochemicals. However, which commercially available AMF species colonize vine roots and affect vine growth remains unknown. The aim of this study was to identify the AMF species from commercial bioinoculants that colonize grapevine roots using high-throughput sequencing, and to evaluate the performance of five commercial bioinoculants and their effects on own-rooted Cabernet sauvignon.

Read More