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 Microjet generator for highly viscous fluids
13.02.2018 | Tokyo University of Agriculture and Technology

nachricht Sweet route to greater yields
08.02.2018 | Rothamsted Research

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: In best circles: First integrated circuit from self-assembled polymer

For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.

In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...

Im Focus: Demonstration of a single molecule piezoelectric effect

Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale

Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...

Im Focus: Hybrid optics bring color imaging using ultrathin metalenses into focus

For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.

But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...

Im Focus: Stem cell divisions in the adult brain seen for the first time

Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.

The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...

Im Focus: Interference as a new method for cooling quantum devices

Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters

Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on High Temperature Shape Memory Alloys (HTSMAs)

15.02.2018 | Event News

Aachen DC Grid Summit 2018

13.02.2018 | Event News

How Global Climate Policy Can Learn from the Energy Transition

12.02.2018 | Event News

 
Latest News

'Lipid asymmetry' plays key role in activating immune cells

20.02.2018 | Life Sciences

MRI technique differentiates benign breast lesions from malignancies

20.02.2018 | Medical Engineering

Major discovery in controlling quantum states of single atoms

20.02.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>