Usurbil, Spain (SPX) Mar 03, 2011
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 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
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 veraison (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
Share This Article With Planet Earth
Farming Today - Suppliers and Technology
Invasive Species Widespread, But Not More Than At Home Range
Ames, Iowa (SPX) Mar 03, 2011
Invasive plant species have long had a reputation as being bad for a new ecosystem when they are introduced. Stan Harpole, assistant professor of ecology, evolution and organismal biology at Iowa State University, is founding organizer of a team of more than 70 researchers working at 65 sites worldwide that tested that assumption. They wanted to know if it is true that problematic invasive ... read more
NASA's Bolden defends Earth science|
NASA to launch Earth observation satellite Friday
Good Progress On Troubleshooting
Ministerial Panel Deliberates Google's Planned Launch Of Street View
Shark Tracking Reveals Impressive Feats Of Navigation
ZST Digital Networks Signs Agreement To Develop City-Wide GPS Platform
Retail Mobile Systems Easily Tricked
MatchMaker OCR Solution By APS Technology Receives Patent
Scientists Study Control Of Invasive Tree In Western US
Four New Species Of Zombie Ant Fungi Discovered
Climate Change Causing Demise Of Lodgepole Pine In Western North America
Bacteria Living On Old-Growth Trees May Help Forests Grow
Microorganism creates fuel, company says
Turning Bacteria Into Butanol Biofuel Factories
Sewage Plant Waste Water As A Huge New Energy Source
Sugarcane Bioethanol: Environmental Implications
LADWP And SolarWorld Partner To Develop PV Power System In LA
PV Evolution Labs Launches Independent Solar Testing Facilities
Enecsys Announces The Cost-Saving, Solar PV Duo
EverGEN Solar Powered Lights Selected For Popular City Bike Path
GL Garrad Hassan Delivers Wind Map Of Lebanon
Eon to build fifth U.K. offshore wind farm
GL Garrad Hassan Launches Onshore Wind Resource Mapping For UK
Construction Begins On Dempsey Ridge Wind Project
China says over 2,400 dead in coal mines in 2010
China mine blast death toll up to 26: state media
Rights groups slam China Jasmine 'repression'
China to raise minimum income tax threshold
China warns journalists on 'Jasmine' rallies
Revamped China history museum skips taboo subjects
|The content herein, unless otherwise known to be public domain, are Copyright 1995-2010 - SpaceDaily. AFP and UPI Wire Stories are copyright Agence France-Presse and United Press International. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by SpaceDaily on any Web page published or hosted by SpaceDaily. Privacy Statement|