Navigation Links
Productivity and quality of grape vary according to plot of vineyard under cultivation
Date:3/2/2011

This release is available in Spanish.

Not all the terrain of the same vineyard has the same properties. Research undertaken by Neiker-Tecnalia (the Basque Institute for Agricultural Research and Development) confirmed that, over the same zone of cultivated land, there are plots with soils of different characteristics, a fact which gives rise to significant differences in the production of the grape and in the quality of the must. Knowing these differences enables the winegrowers to carry out zoning on their vineyards with the goal of better adapting to the needs of fertilisation, irrigation and treatment of the vine. Likewise, it enables carrying out a selective harvest, with plots producing batches of different qualities.

The research, led by doctor in Biology, Ms Olatz Unamunzaga, aimed to establish a zoning of a vineyard, according to the properties of the soil, as well as studying the productive behaviour and quality of wine. The study enables establishing a series of criteria that help to link the behaviour of a vineyard with the properties of the different soils found on the various plots of the vineyard under study.

Four types of soil

The research was carried out on a vineyard of eight hectares located in Oion (in the Basque province of Araba-lava) and belonging to Bodegas y Viedos Zuazo y Gastn. The researchers established a sampling of more than 190 points distributed systematically at various plots of the vineyard, spread over different topographies and orientation. Apart from the properties of the terrain and soil, different parameters related to the robustness and productivity of the vines were measured, such as the weight of the pruned wood, the production per each unit of vine, the number and weight of the bunches of grapes, the weight of the grape, and the quality of the must.

The Neiker-Tecnalia study showed that erosion processes in the soil influences the horizontal and vertical distribution of its properties and, in particular, the depth of it. The variability of the physical properties enabled identifying four types of soil: a) deposition soil, with a depth greater than 110 cm and an irregular distribution of in-depth organic material; b) argillite soil, with a depth of between 85 and 100 cm and characterised by a reddish-coloured clayey layer at 50-80 cm depth; c) limolite soil with a depth of between 50 and 100 cm and an in-depth clay content of 270-380 g per kg; and d) sandstone soil with a depth of between 25 and 80 cm and with a high content of in-depth sand (300 g per kg).

More vigorous vines on soils with greater water retention

Amongst other results, it was shown that soils with the greatest capacity for retention of water (deposition and argillite soil) were those that developed the most robust vines. Hydric availability affected the unit production of the vine and the number of grape bunches on the deposition soil, although it was observed that, after one year of high production and number of grape bunches, there was a considerable drop in these variables the following year.

The research also revealed that the best conditions for obtaining a higher degree of probable alcohol are in years where there is less hydric availability during the setting to the vraison (onset of ripening) periods (middle of June to end of July) and greater hydric availability during ageing (August-September). This effect was clearly reflected with the different types of soil.

The temperature during the month of September prior to the harvest was one of the most influencing factors on the malic acid content of the must. High temperatures favoured the combustion of malic acid and, thus, the loss of this acid. The temperature of the grape bunch was influenced by the temperature of the air and the shade afforded.

The parameter values related to the grape skin (such as the antocyanes, polyphenol index and colour intensity) were greater on the sandstone soil, with a colour intensity up to four times greater than on the other soils.

Thorough control of production

The Neiker-Tecnalia research was carried out at a vineyard complying with the handling and management rules set down by the Denominacin de Origen Calificada Rioja, which determines a maximum production limit. This involves an evermore exhaustive control of the vineyard in order that the limit fixed is not passed and, in this way, balance plant development and production, with the aim of obtaining maximum quality. This balance is closely related to the specific conditions of the soil, climate, cultural practices and piping systems which, in turn, are linked with the variety of the grape.


'/>"/>

Contact: Amaia Portugal
a.portugal@elhuyar.com
34-943-363-040
Elhuyar Fundazioa
Source:Eurekalert

Related biology news :

1. Climate change enhances grassland productivity
2. Ocean islands fuel productivity and carbon sequestration through natural iron fertilization
3. Ethanol production could jeopardize soil productivity
4. Improving livestock productivity in Honduras
5. Ozone depletes oil seed rape productivity
6. Ozone depletes oil seed rape productivity
7. Findings overturn old theory of phytoplankton growth, raise concerns for ocean productivity
8. Half the productivity, twice the carbon
9. New oyster farming technique increases productivity, offers entrepreneurial opportunities
10. CU-Boulder study suggests air quality regulations miss key pollutants
11. Biological sand filters, a practical approach to combat poverty and inequality
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/28/2016)... -- First quarter 2016:   , Revenues ... first quarter of 2015 The gross margin was 49% ... and the operating margin was 40% (-13) Earnings per ... from operations was SEK 249.9 M (21.2) , Outlook ... 7,000-8,500 M. The operating margin for 2016 is estimated ...
(Date:4/15/2016)... -- Research and Markets has announced the ...  report to their offering.  ,      ... gait biometrics market is expected to grow at ... Gait analysis generates multiple variables such ... compute factors that are not or cannot be ...
(Date:3/29/2016)... Florida , March 29, 2016 ... the "Company") LegacyXChange "LEGX" and SelectaDNA/CSI Protect are pleased ... in ink used in a variety of writing instruments, ... Buyers of originally created collectibles from athletes on LegacyXChange ... forensic analysis of the DNA. Bill ...
Breaking Biology News(10 mins):
(Date:6/24/2016)... Brooklyn, NY (PRWEB) , ... June 24, 2016 , ... ... 15mm, machines such as the Cary 5000 and the 6000i models are higher end ... height is the height of the spectrophotometer’s light beam from the bottom of the ...
(Date:6/23/2016)... , June 23, 2016 /PRNewswire/ - FACIT ... Ontario biotechnology company, Propellon Therapeutics ... development and commercialization of a portfolio of first-in-class ... Epigenetic targets such as WDR5 represent an exciting ... significantly in precision medicine for cancer patients. Substantial ...
(Date:6/23/2016)... June, 23, 2016  The Biodesign Challenge (BDC), a ... ways to harness living systems and biotechnology, announced its ... in New York City . ... students, showcased projects at MoMA,s Celeste Bartos Theater during ... , MoMA,s senior curator of architecture and design, and ...
(Date:6/23/2016)... 2016 Apellis Pharmaceuticals, Inc. today announced ... of its complement C3 inhibitor, APL-2. The trials ... dose studies designed to assess the safety, tolerability, ... in healthy adult volunteers. Forty subjects ... single dose (ranging from 45 to 1,440mg) or ...
Breaking Biology Technology: