Terroir 1996 banner
IVES 9 IVES Conference Series 9 Tools for assessing vine nitrogen status; role of nitrogen uptake in the “terroir” effect

Tools for assessing vine nitrogen status; role of nitrogen uptake in the “terroir” effect

Abstract

Among the numerous nutrients vines extract from the soil, nitrogen is the one that interferes most with vine vigor, yield, berry constitution and wine quality. Many studies relate on the influence of various levels of nitrogen fertilization on vine growth, yield and berry constitution (KLIEWER, 1971; BELL et al., 1979; DELAS et al., 1991; SPAYD et al., 1993; SPAYD et al., 1994). Other papers deal with the depressive effect of cover crop on vine nitrogen supply, which can partly explain the quality-improving effect of this technique (SOYER et al., 1996).
Vine nitrogen uptake is likely to vary to a considerable extend with soil parameters, even when no nitrogen fertilization or cover crop occurs. Figuring among those parameters are: soil organic matter content, C/N ratio of soil organic matter and soil organic matter turnover. The latter depends mainly on soil temperature, soil aeration, soil pH and soil moisture content. Despite considerable empirical evidence, almost no literature is available on vine nitrogen status as a function of soil characteristics and the impact of this status on vine development, berry constitution and wine quality. This might be explained by the lack of accuracy of currently available indicators of vine nitrogen status, such as petiole or leaf blade nitrogen content, or their lack of accessibility, as is true for cane arginine content. In this paper we discuss the use of several forms of nitrogen in grape juice (must) as indicators of vine nitrogen status. The accuracy of these indicators provides the means to differentiate nitrogen offer by the soil in “terroir” studies and assess its impact on berry quality potential.

Download the PDF

DOI:

Publication date: February 24, 2022

Issue: Terroir 2000

Type: Article

Authors

Cornelis VAN LEEUWEN (1, 2), Philippe FRIANT (1), Enzo RONCO (3), Cyril JOURDAN (2), Jean-Pierre SOYER (4), Christian MOLOT (4) and Xavier CHONE (2)

(1) ENITA de Bordeaux, 1 Crs du Général de Gaulle, F 33175 Gradignan Cedex
(2) Faculté d’OEnologie, 351 Cours de la Libération, F 33405 Talence Cedex
(3) Faculta’ di Farmacia, Universita’ degli studi di Torino, Italia
(4) INRA Agronomie, Domaine de la Grande Ferrade, F 33140 Villenave d’Ornon

Contact the author

Tags

Terroir 2000

Citation

Related articles…

Effects of mesoclimate on the yield, quality and phenolic maturity of Grenache

The potential climate change, due to global change, will increase temperature general and could increase at local level. These changes are not going to be the same in different parts of the world, being especially important in the Mediterranean Basin.

Read More

Physico-chemical properties of vine pruning residues with potential as enological additive

Grapes are one of the world’s primary fruit crops, and pruning activities generate high amounts of annual wood wastes [1]. These pruning shoots contain valuable phenolic compounds and could have numerous potential applications [1,2]. Consequently, the aim of this work was to evaluate the physico-chemical properties of vine pruning residues with potential as enological additives. For this purpose, grapevine shoots from 12 varieties grown in Chile were collected during the winter of 2021.

Read More

INTENSE PULSED LIGHT FOR VINEYARD WASTEWATER: A PROMISING NEW PROCESS OF DEGRADATION FOR PESTICIDES

The use of pesticides for vine growing is responsible for generating an important volume of wastewater. In 2009, 13 processes were authorized for wastewater treatment but they are expensive and the toxicological impact of the secondary metabolites that are formed is not clearly established. Recently photodecomposition processes have been studied and proved an effectiveness to degrade pesticides and to modify their structures (Maheswari et al., 2010, Lassale et al., 2014). In this field, Pulsed Light (PL) seems to be an interesting and efficient process (Baranda et al., 2017). Therefore, the aim of this work was to investigate the PL technology as a new process for the degradation of pesticides.

Read More

Wine racking in the winery and the use of inerting gases

The O2 uptake in the different winemaking processes is generally considered to be negative for the sensory characteristics of white and rosé wines. Wine racking is a critical point of O2 uptake, as the large surface area of the wine exposed during this operation and the inability to maintain an effective inert gas blanket over it.
The objective was to study O2 uptake during the racking of a model wine without using inert gases and to compare it with the purging of the destination tank with different inert gases.

Read More

Système de Classification Climatique Multicritères (CCM) Géoviticole

Le travail concerne en premier la méthodologie de caractérisation du climat des vignobles, à l’échelle du macroclimat des régions viticoles du monde (géoviticulture). Trois indices climatiques viticoles synthétiques

Read More