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Ciência Rural

Print version ISSN 0103-8478

Cienc. Rural vol.45 no.2 Santa Maria Feb. 2015

 

Press Release

Research evaluates water demand of vines in protected cultivation

Leonardo Cury da Silva

Researchers from Instituto Federal do Rio Grande do Sul, Universidade Federal do Rio Grande do Sul (UFRGS), and from Embrapa Clima Temperado and Embrapa Uva e Vinho, state of Rio Grande do Sul, Brazil, demonstrated that plasticulture reduces by 17% the water demand of vine culture without compromising commercial quality of grape “Itália” in the conditions of the Serra Gaucha. The article was published in the Ciência Rural jornal Rural Science, v.45, February 2015.

The study aimed to evaluate the technological maturity and dimensions (diameter, length and volume) of berries under different conditions of water availability in soil and water consumption. For this, the researchers used plants of Vitis vinifera L."Italy" cultivar cultivar, grafted on ‘420A’, trained on a discontinuous trellis system and total covered with a plastic woven of polypropylene sealed with polyethylene (160μm). Treatments were comprised of specifi c contents of soil water availability,where the control (T1) was kept under fi eld capacity conditions with a soil water matrix potential (ψm) of -33.34 kPa. The other treatments were represented by ψm limits of -42.12 kPa (T2), -76.28 kPa (T3) and -94.32 kPa (T4).

The results show that T3 and T4 anticipated the cycle and the technological maturation of the berries compared to the control group. However, the moderate water deficit (T2) showed higher efficiency of water use by plants, making it the most suitable condition for increasing the quality of the grapes.

For the researcher Leonardo Cury da Silva, the paper breaks new ground by providing minimum and maximum reference of water status of the soil to ensure the quality of grape production "Italy" in Serra Gaúcha. It provides technical support for wine growing in protected cultivation, activity expanded in area 1250% in the last 10 years.

According to Leonardo, many producers of Serra Gaucha have invested in irrigation structures in grape production, investment made empirically and without any technical allowance yet. "Before this study, there was no technical study for proper water management in this condition cultivation, addressing economic and environmental aspects," he says.

Researcher: Leonardo Cury da Silva E-mail: leonardo.cury@bento.ifrs.edu.br

Creative Commons License This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.