Terroir 1996 banner
IVES 9 IVES Conference Series 9 Optimisation de la fertilisation du Cot sur le Causse de l’Appellation d’Origine Contrôlée Cahors

Optimisation de la fertilisation du Cot sur le Causse de l’Appellation d’Origine Contrôlée Cahors

Abstract

L’aire d’Appellation d’Origine Contrôlée de Cahors (Lot) couvre une superficie de 21700 ha, répartis sur 45 communes, dont seulement 4300 sont plantés en vigne. Le cépage principal de cette A.O.C. est le Cot noir qui représente 70 % de l’encépagement, conférant ainsi leur typicité aux vins de cette région ; mais malgré cette importance, à notre connaissance, sa physiologie est restée assez peu étudiée.

Sur cette A.O.C. Cahors, traditionnellement on distingue le vignoble implanté sur le plateau calcaire : le Causse et celui de la vallée : terrasses alluviales du Lot et cônes d’éboulis. Nous avons choisi le Causse qui couvre 70 % de l’A.O.C., et correspond au quart environ de la superficie totale plantée en vigne. Sur différentes parcelles de ce terroir, nous avons réalisé un suivi sur plusieurs années par analyse de sols, de sous sols et par diagnostic foliaire. Les résultats d’analyse de limbes ont permis de déterminer, sur cette zone pédo-climatique homogène, des teneurs optimales en éléments minéraux pour ce cépage. Valeurs de référence permettant de pratiquer une fertilisation raisonnée qui est cependant à moduler en fonction des fluctuations climatiques interannuelles (Garcia et al. 1985).

DOI:

Publication date: March 25, 2022

Type: Poster

Issue: Terroir 1996

Authors

G. BRUN (1), M. GARCIA (1), F. DEDIEU (2), F. LAFFARGUE (3)

(1) Institut National Polytechnique. E.N.S.A.T.
145, Avenue de Muret, 31076 Toulouse cedex, France
(2) Faculté de Pharmacie
35, Chemin des Maraîchers, 31062 Toulouse cedex, France
(3) Maison du Vin de Cahors
B.P. 199, 46004 Cahors cedex, France

Tags

IVES Conference Series | Terroir 1996

Citation

Related articles…

Neural networks and ft-ir spectroscopy for the discrimination of single varietal and blended wines. A preliminary study.

Blending wines from different grape varieties is often used in order to increase wine complexity and balance. Due to their popularity, several types of blends such as the Bordeaux blend, are protected by PDO legislation.

Effect of potential crop on vine water constraint

It is important to quantify the effect of potential crop on vine water constraint in order to adapt vine-growing consulting and vine management to the Mediterranean climate conditions

Amyndeon‐naoussa: the two faces of Xinomavro

Xinomavro is the most important indigenous red wine variety grown in Northern Greece. It participates in the production of several PGI wines in Macedonia while from 100% Xinomavro the PDO “Amyndeon” and “Naoussa” are produced. The viticultural area of Amyndeon lies in a plateau of 550 ‐700 m of altitude, in a semi‐continental climate with mostly deep sandy loamy soils derived from limestone and marl bedrocks while in Naoussa, Xinomavro is grown in a Mediterranean climate on more heavy textured soils, sandy clay loam to clay, derived from ophiolithic, limestone and marl bedrocks, in an altitude which varies from 150 to 400 m. Different soil, climate and viticultural technique interactions, result in great variability with respect to morphological, ampelographical and physiological characters of Xinomavro as well as in the characteristics of the wines produced. 

Staying hydrated – not easy when it’s hot!

Heat and drought episodes during the growing season are becoming more frequent and more severe in many of the world’s grape‐growing regions

Low and zero alcohol “wines”: impact of different dealcoholization processes on phenol profile and health benefits

Consumers’ demand for non-alcoholic wine has notably increased in the last years: this trend is a consequence of a growing interest in more healthy habits, and as a response to higher alcohol levels in wine due to climate change. In addition, drinking limitations due to physiological/pathological conditions (e.g., pregnancy, diabetes, hepatic disorders), driving regulations, ethical/religious considerations, and high import taxes on alcoholic beverages have positively influenced this marked (us$ 1.6 billion in 2021). International organisation of vine and wine (OIV) established that alcohol content defining wines must not be less than 8.5% vol, (OIV, 2017).