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…

Quantification of polysaccharides of variety Pomaces of the D.O.Ca Rioja

Pomace is one of the main residues generated by the wine industry and represents an environmental problem. Currently, there is a growing interest in the revaluation of these products because different bioactive compounds can be obtained from them, such as polyphenols, grape seed oils and polysaccharides. Red grape pomace can be an important source of polysaccharides, but they are currently little studied and even less with viable and environmental extraction processes (green extraction), such as flash extraction. The residual amount of the fraction rich in pectin (residual pulp) and component rich in hemicellulose in the pomace and the strength of association of the pectin with the cellulose-xyloglucan network depend on the degree of extractability of the polysaccharides in red winemaking and on the winemaking conditions.

Evaluation of the effects of pruning methodology on the development of young vines 

Grapevine pruning is one of the most important practices in the vineyards. Winegrowers use it to provide the vines the shape needed, or to maintain it once achieved, and also to balance vegetative growth and fruit production. In the last decades, careless pruning has been blamed, among other factors, as responsible of the vineyard decay that is been observed even in young vines. However, to our knowledge, there is a lack of systematic research trying to elucidate to which extent the pruning method used affects plant development or its susceptibility to grapevine trunk diseases (GTD). Within this context, the aim of this work is to study the influence of different pruning method strategies on the development of field-planted young vines.

Acceptability of canned wines: effect of the level of involvement of consumers and type of wine

In recent years there has been a growing demand for alternative packaging designs in the food industry focused on diminishing the carbon footprint. Despite the environmental advantages of cans versus bottles, the traditional environment of wine has hindered the establishment of less contaminant containers. In this context, the objective of this study was to understand and generate knowledge about consumers´ perception of canned wines in comparison to bottled wines.

Association between dietary pattern and wine consumption and Alzheimer’s disease in a cohort from La Rioja (Spain)

Addressing modifiable risk factors is the most promising strategy to prevent/delay Alzheimer Disease (AD)[1]. The aim of the study was to establish the connections between dietetic habits, wine consumption and AD. Thus, 98 volunteers were recruited: 50 diagnosed as AD and 48 healthy/controls. The Food Frequency Questionnaire (FFQ) was used for dietary patterns assessment and, based on these data, the Mind Diet Score was calculated. (Poly)phenol metabolites (especially derived from wine consumption) were analyzed by UPLC-QqQ-MS/MS in 24-h urine samples to confirm dietary (poly)phenol consumption.

Possible methods of adaptation to the effects of climate change in the Tokaj Wine Region 

Viticulture’s adaptation to the harmful effects of climate change is globally the biggest challenge of the near future. Short, extremely intensive rainfalls and longer periods of drought are getting more frequent in the Tokaj Wine Region, where the majority of the vineyards are cultivated on steep slopes. Hence, erosion has high risk, especially when combined with the loess-based soils on about ten percent of the region. The environmentally beneficial cover crop and mulch usage can effectively reduce the risk of erosion, according to research done by the Tokaj Wine Region Research Institute of Viticulture and Oenology.