Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL

Ourense, Spain

Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL

Ourense, Spain

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Miras-Avalos J.M.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL | Trigo-Cordoba E.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL | Bouzas-Cid Y.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL | Orriols-Fernandez I.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL
Journal International des Sciences de la Vigne et du Vin | Year: 2016

Aims: Vine-growers worldwide are concerned about climate change effects on grape yield and quality. Drip irrigation systems are increasingly being installed even in humid regions such as Galicia (NW Spain). In this context, a field experiment was carried out over three seasons (2012-2014) on white Vitis vinifera L. cv. 'Albariño' to assess the effects of deficit irrigation on vine physiology, yield and must and wine composition. Methods and results: Rain-fed vines were compared with a treatment irrigated to 50% of the estimated crop evapotranspiration (ETc) from bloom to two weeks before harvest. Irrigated vines showed more positive stem water potentials than those rain-fed. Yield was unaffected by irrigation except in 2014 (19% increase). Pruning weight was increased by irrigation. Must soluble solids tended to decrease and total acidity to increase with irrigation; however, wines were similar between treatments. Water productivity was slightly higher under rain-fed conditions. Conclusion: Under the conditions of this experiment, irrigation was of no interest either in terms of grape and wine quality or in terms of net income. Significance and impact of the study: These results may be useful for managing water resources in vineyards under similar climatic conditions. © Université de Bordeaux (Bordeaux, France).


Miras-Avalos J.M.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL | Trigo-Cordoba E.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL | Bouzas-Cid Y.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL | Bouzas-Cid Y.,University of Vigo | Orriols-Fernandez I.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL
Ciencia e Tecnica Vitivinicola | Year: 2016

Growers are concerned about the negative impacts on vine yield and berry quality caused by global warming. Irrigation systems are increasingly being installed in vineyards in order to counteract those problems. Therefore, an efficient irrigation management is required. In this context, a field experiment was carried out over three years (2012-2014) on red Vitis vinifera (L.) cv. 'Brancellao' and 'Sousón' in order to assess the effects of supplementary irrigation on vine performance and must and wine composition. Rain-fed vines were compared with a treatment irrigated to 40% of potential evapotranspiration (ET0) from bloom to two/three weeks before harvest. Both cultivars showed less negative stem water potentials under irrigation than under rain-fed conditions; however, stomatal conductance was similar between treatments. Yield was unaffected by irrigation, whereas pruning weight tended to increase in both cultivars. Must and wine composition, including amino acids and volatile compound concentrations, were mostly unaffected by irrigation. Water productivity was higher under rain-fed conditions and, as a consequence, gross incomes were not increased by irrigation. Therefore, irrigation does not seem an economically viable agricultural practice under the conditions of this trial.


Miras-Avalos J.M.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL | Miras-Avalos J.M.,CSIC - Center of Edafology and Applied Biology of the Segura | Fandino M.,University of Santiago de Compostela | Trigo-Cordoba E.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL | And 4 more authors.
LWT - Food Science and Technology | Year: 2017

Consumer research provides insight into market acceptance, preference, and perception of foods and beverages. We aimed to investigate the effect of irrigation on consumer acceptability of white wines. Experiments comparing irrigated against rain-fed Albariño and Godello vines were conducted from 2012 to 2014 on three areas in NW Spain: Rías Baixas, Ribeiro and Valdeorras. Wines were tasted by approximately 50 consumers each year. Consumers rated their hedonic liking of each wine using a 5-point qualitative scale (from "dislike" to "like extremely"). Consumer acceptance was analyzed using descriptive and multivariate techniques. Albariño wines from Rías Baixas showed very similar results for 2013 and 2014. However, in 2012, rain-fed wines were preferred by consumers. In Ribeiro, in 2014, Albariño wines from irrigation were preferred over those from rain-fed. Godello wines were similarly accepted by consumers; however, wines from the rain-fed treatment tended to receive higher marks than those from the irrigated treatment. Results depended on variety and year. This work suggests that irrigation might affect the sensory profile of Galician white wines. Hence, it contributes to the knowledge base in that it is the first to investigate consumer preference in Galician wines from two cultivars grown in three different Designations of Origin. © 2017 Elsevier Ltd.


Vidal-Vazquez E.,University of La Coruña | Camargo O.A.,Instituto Agronomico Of Campinas Iac | Vieira S.R.,Instituto Agronomico Of Campinas Iac | Miranda J.G.V.,Federal University of Bahia | And 4 more authors.
Vadose Zone Journal | Year: 2013

Soil textural fractions, organic carbon content, pH, and attributes of the soil exchange complex were sampled parallel and perpendicular to land slope, along two transects. All data sets have been found to exhibit slight to strong multifractal behavior. Most variables showed different scaling properties between the two transects. The spatial variability of soil properties can be best characterized through concepts of scale invariance, fractals, and multifractals. The objectives of this study were to analyze and to compare the scaling patterns and structural heterogeneity of soil properties across two transects in Campinas, SP, Brazil, using the multifractal formalism. Two transects were marked parallel and perpendicular to land slope, with a length of 2.28 and 1.98 km, respectively. Soil samples were collected at the 0 to 20 cm depth every 30 m. The soil properties analyzed were: texture (sand, silt, clay), pH (H2O and KCl), organic carbon (OC) content, exchangeable Ca, H, and Al, exchangeable bases (SB), cation exchange capacity (CEC), and percent base saturation (V). Spatial variability of soil properties was controlled by natural causes, including parent material and topography, and by soil use and management. The variability of pH across the two transects was characterized by either quasi-monofractal behavior or by a relatively low degree of multifractality. The other soil properties studied showed stronger degrees of multifractality. Hence, the multifractality for OC and silt content was much higher at the transect perpendicular to land slope. Variables from the soil exchange complex, particularly exchangeable Al, Ca, and SB, were characterized by higher multifractal indices in the two transects. Patterns of spatial distribution assessed by multifractal analysis were linked to soil forming factors and processes. Our results suggest that scale heterogeneity in the spatial distribution of soil properties was enhanced by the interaction of various natural or anthropogenic sources of variability. © Soil Science Society of America 5585 Guilford Rd., Madison, WI 53711 USA. All rights reserved.


Arrieta-Garay Y.,Rovira i Virgili University | Lopez-Vazquez C.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL | Blanco P.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL | Perez-Correa J.R.,University of Santiago de Chile | And 2 more authors.
Journal of the Institute of Brewing | Year: 2014

The impact of the distillation system and yeast strain on the chemical and aromatic profile of kiwi spirits was investigated. Three fermentations of kiwi fruits were carried out, two with selected yeasts (KL1 and KL2) and one spontaneous (KL3). The obtained kiwi wines were distilled using two distillation systems (Charentais alembic and packed column), and the resulting spirits were analysed by direct injection gas chromatography. Kiwi spirits obtained with the packed column had the highest concentrations of esters C6-C10 and monoterpenols, while the alembic spirits had the highest concentrations of ethyl acetate, methyl acetate and higher alcohols. Three principal components derived from the chemical composition data explained 96.6% of the variance. Principal component 1 differentiated alembic from packed column distillates, principal component 2 distinguished KL3 spirits and principal component 3 distinguished KL1 spirits. Kiwi spirits distilled with the packed column were preferred by consumers. The predominant sensory descriptors in the packed column kiwi spirits were floral, fruity and spicy, while burnt/smoky and pungent were the principal aroma descriptors in alembic spirits. Moreover, significantly higher ethanol yields and ethanol strengths were obtained with the packed column distillation system. The observed influence of the yeast strains on preference and ethanol yields was minor. © 2014 The Institute of Brewing & Distilling.


Trigo-Cordoba E.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL | Bouzas-Cid Y.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL | Orriols-Fernandez I.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL | Miras-Avalos J.M.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL
Ciencia e Tecnica Vitivinicola | Year: 2014

This study aimed to assess the effect of irrigation on the sensory profile of wines from three Galician white grapevine cultivars. Field experiments were carried out in 2011 and 2012 at the research farm of the Estación de Viticultura e Enoloxía de Galicia (EVEGA), where two treatments were imposed: rain-fed and irrigation to the 50% of potential evapotranspiration. A panel of seven judges tasted the wines in six sessions (one per cultivar and year) for evaluating their sensory profile. In the case of 'Albariño', three descriptors, although not the same for both years, were significantly different between treatments. For 'Godello', several descriptors differed between treatments, and citric was present in both years. In 'Treixadura' white fruit and persistence were present in 2011 and 2012. Several descriptors contributed to the hedonic index, but differed between wines; however, balance was common for all the cultivars and years. In conclusion, 'Albariño' and 'Godello' wines from the rain-fed treatment received higher marks than those from the irrigation treatment; whereas Treixadura wines from the irrigation treatment were better valued.


Cancela J.J.,University of Santiago de Compostela | Trigo-Cordoba E.,University of Santiago de Compostela | Martinez E.M.,University of Santiago de Compostela | Rey B.J.,University of Santiago de Compostela | And 3 more authors.
Agricultural Water Management | Year: 2016

Inter-annual climate variability, mainly rainfall temporal distribution, is a critical factor for scheduling irrigation. In order to efficiently manage precision irrigation systems for Vitis vinifera (L.), their effects on plant physiology, and vineyard soils, together with yield and quality parameters, need to be understood. The current study was conducted on two grapevine cultivars from Galicia (NW-Spain), cv. 'Albariño' and 'Godello', during 2012-2014, in two different Designations of Origin (DO): Rías Baixas and Valdeorras. The treatments were rainfed (R) and surface drip irrigation (DI) in DO Rías Baixas, adding subsurface drip irrigation (SDI) in DO Valdeorras, with four replicates (7 plants each). Irrigation was triggered at fruit set, when midday stem water potential (Ψstem) dropped to -0.5MPa, and stopped 15 days before harvest in DO Valdeorras; but it was managed by the vinegrower in DO Rías Baixas. Different bioclimatic indices were calculated to characterize each season and location. Soil water content and Ψstem were periodically measured to assess vineyard water status. Yield and juice quality attributes were determined. Water productivity indices were calculated to compare locations and cultivars. Differences between DOs were observed regarding bioclimatic indices, which indicated temperate and very cool nights for cv. 'Godello'. In the case of 'Albariño', warmer nights were observed. In DO Valdeorras, the differences between treatments in Ψstem were never higher than -0.19MPa; whereas they were almost null in DO Rías Baixas. Yield parameters showed a worse overall productive performance for the R treatment, with lower yields in 2012 and 2013. Qualitative parameters were stable over the three growing seasons studied. Adjusting irrigation schedules for a given season using Ψstem measurements and considering the phenological stage of the vine might help to obtain homogeneous harvests, both in yield and quality. Water productivity indices related with grape yield and pruning weight showed that, in a temperate climate, vegetative growth has an important weight in vineyard water use. © 2016 Elsevier B.V.


Trigo-Cordoba E.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL | Bouzas-Cid Y.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL | Orriols-Fernandez I.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL | Diaz-Losada E.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL | Miras-Avalos J.M.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL
Spanish Journal of Agricultural Research | Year: 2015

Vineyards are usually managed by tilling the inter-rows to avoid competition from other plants for soil water and nutrients. However, in humid and sub-humid climates, such as that of NW Spain, cover crops may be an advantage for controlling vine vegetative growth and improving berry composition, while reducing management costs. The current study was conducted over three consecutive growing seasons (2012-2014) to assess the effects of establishing three permanent cover crop treatments on water relations, vine physiology, yield and berry composition of a vineyard of the red cultivar ‘Mencía’ (Vitis vinifera L.) located in Leiro, Ourense. Treatments consisted of four different soil management systems: ST, soil tillage; NV, native vegetation; ER, English ryegrass (Lolium perenne L.); and SC, subterranean clover (Trifolium subterraneum L.). Midday stem water potential was more negative in the native vegetation treatment, causing significant reductions in leaf stomatal conductance on certain dates. Total vine leaf area and pruning weight was reduced in the cover crop treatments in the last year of the experiment. Yield was unaffected by the presence of a cover crop. No significant differences among treatments were observed for berry composition; however, wines were positively affected by the SC treatment (higher tannin content and colour intensity and lower malic acid concentration when compared with ST). Wines from the cover crop treatments were preferred by taste panelists. These results indicate that in humid climates cover crop treatments can be useful for reducing vine vegetative growth without compromising yield and berry quality. © 2015 INIA.


Bouzas-Cid Y.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL | Bouzas-Cid Y.,University of Vigo | Falque E.,University of Vigo | Orriols I.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL | And 4 more authors.
Ciencia e Tecnica Vitivinicola | Year: 2015

Amino acids constitute a source for yeast metabolism and, thus are of paramount importance to wine flavour and aroma. Their concentrations in must depend greatly on grape variety. The aim of this work was to describe the amino acids profile of two white grapevine varieties: 'Godello' and 'Treixadura', produced in Galicia (NW Spain). The study was carried out over two consecutive vintages (2012 and 2013). Amino acids profiles of the musts were determined using HPLC. Although the musts from the two varieties presented common major and minor amino acids, the greatest contents were observed for 'Treixadura'. 'Godello' and 'Treixadura' varieties were arginine-accumulators, since this was the amino acid found at the highest level in the musts from the two cultivars. Amino acids contents were higher in 2012 than in 2013, likely due to climate differences between years.


Trigo-Cordoba E.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL | Trigo-Cordoba E.,University of Santiago de Compostela | Bouzas-Cid Y.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL | Orriols-Fernandez I.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL | Miras-Avalos J.M.,Estacion de Viticultura e Enoloxia de Galicia EVEGA INGACAL
Agricultural Water Management | Year: 2015

Galicia is a region located in NW Spain characterized by high rainfall amounts; however, climate change is altering the temporal and spatial distribution of rainfall. Thus, vinegrowers are concerned about this climate variability that may affect grape production and quality and, therefore, drip irrigation systems are increasingly being installed in Galician vineyards. Hence, the development of efficient irrigation management practices is required. In this regard, a field experiment was carried out over three seasons (2012-2014) on white Vitis vinifera L. cv. 'Godello' and 'Treixadura' in order to assess the effects of deficit irrigation on vine performance and must and wine composition. Rain-fed vines were compared with a treatment irrigated to 50% of the estimated crop evapotranspiration (ETc) from bloom to two weeks before harvest. Both cultivars showed more positive plant water status under irrigation than under rain-fed conditions; however, stomatal conductance and chlorophyll fluorescence attributes were similar between treatments. Yield was unaffected by irrigation except for Treixadura cultivar in 2014 (25% increase). On the contrary, irrigation increased pruning weight, around 15%, for both cultivars. Total soluble solids of the must decreased and total acidity increased with irrigation; however, the wines were very similar between treatments. Water productivity was higher under rain-fed conditions for Godello, which led to similar gross incomes between treatments but with a lower production cost for rain-fed. In the case of Treixadura, significantly higher gross incomes were estimated for irrigation only in the last year of studies, which may not justify the use of irrigation. Therefore, irrigation does not seem an economically viable agricultural practice under the conditions of this trial. © 2015 Elsevier B.V.

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