Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Response of vine to different irrigation policies

17.07.2003


Gonzaga Santesteban, lecturer at the Public University of Navarre, concluded his thesis stating that a generalised recommendation on vine irrigation cannot be offered as the factors involved are diverse: the terrain where the vine is planted, the climate on the zone and the quantity of grape involved.



Problems with irrigation policy

Gonzaga Santesteban has investigated “The effect of irrigation on the quality of the grape and the wine in the Tempranillo variety”.


It has to be remembered that vine irrigation presents difficulties given that if the grape seed is too large the wine is not of good quality. This is why, as a general rule, it is accepted that although excessive irrigation impedes enologically high-quality harvests, it is difficult to predict the results of any one specific policy.

The research led by Gonzaga Santesteban is, basically, aimed at finding a method which will enable the wine-grower, who is the person who makes the decisions on irrigation, to be correctly advised .

Trials on vineyards in Corella

A series of trials were carried out on a 3.2 hectare estate in Corella in Navarra.

The estate was divided into four sectors each of which, over a period of three years, was subjected to a dosage of three irrigation plans a year. This enabled the analysis of a large number of situations differentiated by the initial conditions of the plants (vigour, potential crop and fertility of the young shoots) and by the level of stress they supported.

After the analysis of the results, the researchers came to the conclusion that no general recommendation on irrigation could be given. It was shown that, if the plant does not have water during the months of August and September, which is when the grape matures, photosynthesis is halted and the grape does not mature sufficiently. On the other hand, it is also true that, if the plant has too much water over this period, the maturing fruit grows too much and the quality is not good, either. In short, an irrigation plan has to be tailored to the type of soil and the quantity of grape which the vine carries.

In order to determine a plan for irrigation, the researchers propose the following method: assess the water needs of the plant. This is done by using a standard measure: the foliar water potential measured before daybreak, which is when the plant has most water.

The results of the research team has enabled mathematical models to be established which can predict precisely the size of the growing grapes, their sugar concentration and the end yield of the vine plants. These models are of great use when taking decisions in the field regarding the pruning potential crop and

Iñaki Casado Redin | Basque research
Further information:
http://www.unavarra.es

More articles from Agricultural and Forestry Science:

nachricht Fighting a destructive crop disease with mathematics
21.06.2017 | University of Cambridge

nachricht Unusual soybean coloration sheds a light on gene silencing
20.06.2017 | University of Illinois College of Agricultural, Consumer and Environmental Sciences

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Can we see monkeys from space? Emerging technologies to map biodiversity

An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.

Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...

Im Focus: Climate satellite: Tracking methane with robust laser technology

Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.

Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...

Im Focus: How protons move through a fuel cell

Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.

As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...

Im Focus: A unique data centre for cosmological simulations

Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...

Im Focus: Scientists develop molecular thermometer for contactless measurement using infrared light

Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine

Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Plants are networkers

19.06.2017 | Event News

Digital Survival Training for Executives

13.06.2017 | Event News

Global Learning Council Summit 2017

13.06.2017 | Event News

 
Latest News

Quantum thermometer or optical refrigerator?

23.06.2017 | Physics and Astronomy

A 100-year-old physics problem has been solved at EPFL

23.06.2017 | Physics and Astronomy

Equipping form with function

23.06.2017 | Information Technology

VideoLinks
B2B-VideoLinks
More VideoLinks >>>