terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Culturable microbial communities associated with the grapevine soil in vineyards of La Rioja, Spain

Culturable microbial communities associated with the grapevine soil in vineyards of La Rioja, Spain

Abstract

The definition of soil health is complex due to the lack of agreement on adequate indicators and to the high variability of global soils. Nevertheless, it has been widely used as synonymous of soil quality for more than one decade, and there is a consensus warning of scientists that soil quality and biodiversity loss are occurring due to the traditional intensive agricultural practices.

In this work we monitored a set of soil parameters, both physicochemical and microbiological, in an experimental vineyard under three different management and land use systems: a) addition of external organic matter (EOM) to tilled soil; b) no tillage and plant cover between grapevine rows, and c) grapevines planted in rows running down the slope and tilled soil. Monitoring was performed in the soil top-layer (10 – 20 cm depth) and in the deeper layer (20 – 30 cm). The monitored physicochemical parameters were: pH; soil organic matter; total N; C/N ratio; soil texture; soil temperature and humidity; and the biological parameters: soil respiration (CO2 efflux using the chamber technique) and microbial populations of the following microbial families: yeasts, decomposers of organic matter (actinomycetes), nitrogen fixing bacteria and total aerobes.

Results showed that the EOM dosage was correctly adjusted and maintained the soil biochemical equilibrium and fertility. With regard to microbial populations, it was shown that the vineyard soil is a relevant yeast reservoir that conserved its yeast populations above 104 CFU/g dry soil. Results also showed that the most abundant microbial family was the nitrogen-fixing bacteria located in the soil top-layer, and remarkably, this population showed the highest values during the humid period and in the soil that received EOM, whereas the tilled soil on slope showed the lowest values. It is worth noting that the measured parameter of CO2 efflux showed higher values in the soil deeper layer, proximate to the grapevine rhizosphere, than in the upper layer, and it did not correlate with microbial populations. This could be explained by the fact that soil mesofauna is more abundant in the deeper, warmer and more humid soil layer than in the upper layer, and to the abundance of plant roots in the soil deeper layer. In summary, in this work it is shown that an adequate EOM addition to the vineyard soil can contribute to its microbial richness, which is regarded as a parameter associated with soil health.

Acknowledgment: Financed with the Project EOM4SOIL of the E.U. H2020-EJP SOIL Program.

DOI:

Publication date: October 9, 2023

Issue: ICGWS 2023

Type: Poster

Authors

1J. Ugarte, I. Morteruel , 1E. Rodrigo, 1J. M. Martínez-Vidaurre, 2C. Tenorio, 2F. Ruiz-Larrea

1Instituto de Ciencias de la Vid y del Vino – ICVV (Gobierno de La Rioja, Universidad de La Rioja, CSIC), Finca La Grajera, Ctra. De Burgos km 6, Logroño, 26007 (Spain).
2Universidad de La Rioja, ICVV (CSIC, Universidad de La Rioja, Gobierno de La Rioja), Av. Madre de Dios 53, 26006 Logroño (Spain).

Contact the author*

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

Analysis of volatile composition of interaction between the pathogen E. necator and two grapevine varieties

Volatile organic compounds (VOCs) are emitted by nearly all plant organs of the plants, including leaves. They play a key role in the communication with other organisms, therefore they are involved in plant defence against phytopathogens. In this study VOCs from grapevine leaves of two varieties of Vitis vinifera infected by Erysiphe necator were analysed. The varieties were selected based on their susceptibility to pathogen, Kishmish Vatkana has the Ren1 resistance gene and Zamarrica showed high susceptibility in previous trials.

Effect on the grape and wine characteristics of cv. Tempranillo at 3 production levels

The vineyard has experienced a general increase in yields mainly due to the elevated use of technology which caused a quality loss of grapes in more than one case. A large percentage of the Spanish vineyard is covered by a Denomination of Origin which limits the productive level of the vineyards as one of its regulations. The maximum production limit is a variable characteristic of each vineyard and is not usually regulated by agronomic criteria, and this explains the fact that each vineyard can reach high quality with a totally different yield from that set by the Denomination of Origin.

Combined abiotic-biotic plant stresses on the roots of grapevine

In the 19th century, devastating outbreaks of phylloxera (Daktulosphaira vitifoliae Fitch), almost brought European viticulture to its knees. Phylloxera does not only take energy in form of sugars from the vine, but also affects the up- and down- regulations of genes, acts as a carbon sink and reprograms the physiology of the grapevines, including nutrient uptake and the defense system [1]. A key trait of rootstocks is the ability to perform well under high lime conditions as about 30 % of the land surface has calcareous soil. Iron deficiency not only causes the well-known problems of lime-induced chlorosis and stunted growth, but also affects the entire plant metabolism.

Sensory profile of wines obtained from disease-resistant varieties in La Rioja

The European wine industry is facing multiple challenges derived from climate change and the pressure of different fungal diseases that are compromising the production of traditional varieties. A sustainable alternative maybe the adoption of resistant varieties.
In this study, we have evaluated the enological potential of 9 resistant varieties (5 white and 4 red varieties) in La Rioja. Microvinifications were carried out with three biological replications. Oenological parameters were very diverse with acid content varying from 2.6 g/L to 6.6 g/L.

Correlative study between degradation of rosé wine under accelerated conditions and under normal conditions

Several studies have tried to develop different methods to study the photodegradation of wine in an accelerated way, trying to elucidate the effect of light on the wine compounds[1]. In a previous study, our team developed a chamber that speeds up the photodegradation of rosé wine[2]. In the present work we have tried to establish a correlation between irradiation times in accelerated conditions and the natural exposure to the cycles of light that usually exist in markets or at home.