Paper · 2009 · Journal of Wine Research

Organic Acids and Sugars in Musts of Irrigated Grapevines in Northeast Portugal

Manuel T. Oliveira; Tiago A. Sousa

2
claims
4
verbatim quotes
12
citations
3
research areas
—
Not open access

Abstract

In northeast Portugal traditionally the vineyards are non-irrigated and produce musts with high sugar content and very low acidity, quite below the preferred 6 to 7 mg l−1 equivalent of tartaric acid, thus, it is a common commercial practice to correct the wine acidity adding tartaric acid. As the practice of irrigation is now more widespread, we have set up an experimental field to evaluate the potential of altering soil water content at different timings and rates on producing musts with higher content of organic acids and to determine the best irrigation strategy to achieve that purpose with the least impact on the sugar content. Moderate amounts of irrigation from flowering to veraison improve productivity and limited the negative impacts on must quality.

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Claims 2

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Moderate irrigation from flowering to veraison improves productivity.

Taxon
GrapevinesVitist0
Treatment
Moderate amounts of irrigation from flowering to veraisone0
Outcome
productivitye0
Direction
improvee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vitis
Vitis · Taxon · picture of the genus (one of its species)Victor M. Vicente Selvas · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Moderate amounts of irrigation from flowering to veraison improve productivity and limited the negative impacts on must quality.”

✓ located verbatim in the source · abstract, characters 641–769 · show in text ↑
t0

“Grapevines”

✓ located verbatim in the source · title, characters 47–57 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Moderate irrigation from flowering to veraison limits negative impacts on must quality.

Taxon
GrapevinesVitist0
Treatment
Moderate amounts of irrigation from flowering to veraisone0
Outcome
negative impacts on must qualitye0
Direction
limitede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vitis
Vitis · Taxon · picture of the genus (one of its species)Victor M. Vicente Selvas · Public domain · Wikimedia Commons ↗

Verbatim

e0

“Moderate amounts of irrigation from flowering to veraison improve productivity and limited the negative impacts on must quality.”

✓ located verbatim in the source · abstract, characters 641–769 · show in text ↑
t0

“Grapevines”

✓ located verbatim in the source · title, characters 47–57 · show in text ↑

irrigation · yield · VitisResults differ

83 papers: 52 positive, 31 negative or no effect

51 papers in the same direction as this paper · 28 in the opposite direction · 3 reporting no difference from an alternative

  1. positive
  2. no effect
  3. no effect

79 papers more in this group

See all 83 papers →

stage · quality: general · VitisPositive and negative results

5 papers: 3 positive, 2 negative or no effect

2 papers in the same direction as this paper · 2 in the opposite direction

  1. negative
  2. negative
  3. positive

1 paper more in this group

See all 5 papers →

stage · yield · VitisPositive and negative results

12 papers: 8 positive, 4 negative or no effect

7 papers in the same direction as this paper · 4 in the opposite direction

  1. negative
  2. negative
  3. no effect

8 papers more in this group

See all 12 papers →

irrigation · quality: general · VitisPositive and negative results

23 papers: 5 positive, 18 negative or no effect

4 papers in the same direction as this paper · 15 in the opposite direction · 3 reporting no difference from an alternative

  1. negative
  2. no effect
  3. no effect

19 papers more in this group

See all 23 papers →

Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.