Abstract
Summary The impact of different irrigation regimes based on two ripeness index, on the quantity and quality of virgin olive oil from the introduced olive cultivar Olea europaea L. Koroneiki grown at a high‐density olive orchard in northern Tunisia, was assessed. Olive trees were subjected to three treatments (T1, T2 and T3) that received a seasonal water amount equivalent to 50%, 75% and 100% of the estimated local evaporative demand by a drip irrigation system and olives were collected in two different ripeness index. The olive oil content decreased when the water applied was increased but rose during ripening. The quality indexes and fatty acid composition were less affected by the irrigation schedule but most significantly by the maturity of olives. Moreover, phenol contents increased according to fruit ripening whereas no clear cut differences or consistent effects were observed by irrigation. α‐tocopherol decreased slightly in the oils as ripening progressed while insignificant differences between the irrigation treatments studied were obtained. Consequently, a restitution of 75% of crop evapotranspiration (ET c. ) was sufficient to achieve good minor compounds; however, higher water volumes (100% ET c. ) gave little additional α‐tocopherol and phenols increases.
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Claims 7
Claim · model-written summary
Olive oil content decreased as applied irrigation water increased.
- Taxon
- olive
Olea europaeat0 - Material
- Koroneikit0
- Treatment
- water appliede0
- Outcome
- olive oil contente0
- Direction
- decreasede0
- Setting
- Tunisiat0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The olive oil content decreased when the water applied was increased but rose during ripening”
t0“virgin olive oils from Koroneiki cultivar grown in Tunisia”
Claim · model-written summary
Olive oil content rose during ripening.
- Taxon
- oliveOlea europaeat0
- Material
- Koroneikit0
- Treatment
- ripeninge0
- Outcome
- olive oil contente0
- Direction
- rosee0
- Setting
- Tunisiat0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The olive oil content decreased when the water applied was increased but rose during ripening”
t0“virgin olive oils from Koroneiki cultivar grown in Tunisia”
Claim · model-written summary
Quality indexes and fatty acid composition were affected most significantly by olive maturity and less by irrigation.
- Taxon
- oliveOlea europaeat0
- Material
- Koroneikit0
- Treatment
- maturity of olivese0
- Outcome
- quality indexes and fatty acid compositione0
- Setting
- Tunisiat0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The quality indexes and fatty acid composition were less affected by the irrigation schedule but most significantly by the maturity of olives”
t0“virgin olive oils from Koroneiki cultivar grown in Tunisia”
Claim · model-written summary
Phenol contents increased with fruit ripening.
- Taxon
- oliveOlea europaeat0
- Material
- Koroneikit0
- Treatment
- fruit ripeninge0
- Outcome
- phenol contentse0
- Direction
- increasede0
- Setting
- Tunisiat0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“phenol contents increased according to fruit ripening whereas no clear cut differences or consistent effects were observed by irrigation”
t0“virgin olive oils from Koroneiki cultivar grown in Tunisia”
Claim · model-written summary
Irrigation had no clear or consistent effect on phenol contents.
- Taxon
- oliveOlea europaeat0
- Material
- Koroneikit0
- Treatment
- irrigatione0
- Outcome
- phenol contentse0
- Direction
- no clear cut differencese0
- Setting
- Tunisiat0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“phenol contents increased according to fruit ripening whereas no clear cut differences or consistent effects were observed by irrigation”
t0“virgin olive oils from Koroneiki cultivar grown in Tunisia”
Claim · model-written summary
α-tocopherol decreased slightly in the oils as ripening progressed.
- Taxon
- oliveOlea europaeat0
- Material
- Koroneikit0
- Treatment
- ripeninge0
- Outcome
- α‐tocopherole0
- Direction
- decreased slightlye0
- Setting
- Tunisiat0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“α‐tocopherol decreased slightly in the oils as ripening progressed”
t0“virgin olive oils from Koroneiki cultivar grown in Tunisia”
Claim · model-written summary
Restitution of 75% of crop evapotranspiration was sufficient to achieve good minor compounds; 100% gave little additional gain.
- Taxon
- oliveOlea europaeat0
- Outcome
- good minor compoundse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a restitution of 75% of crop evapotranspiration (ET c. ) was sufficient to achieve good minor compounds”
t0“virgin olive oils from Koroneiki cultivar grown in Tunisia”
The same questions in other papers
irrigation · quality: phytochemicals · Olea europaea (common olive)Positive and negative results
5 papers in the same direction as this paper · 12 in the opposite direction
- positive
- positive
- positive
14 papers more in this group
See all 18 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.