Abstract
Croatian islands are olive growing areas characterized by poor conditions for olive trees because of karst soil and a precipitation deficiency. Under these conditions, irrigation is a very important factor for constant olive oil production. This paper aims to investigate the effects of different watering regimes on quantity, sensory and chemical quality and composition of Coratina cv. olive oil obtained from trees grown on ameliorate karst soil during two harvesting years. Olive trees were subjected to rainfed conditions and three different irrigation treatments (T1—deficit irrigation representing the usual producer’s practice, T2—regulated deficit irrigation in respect to phenological stages, T3—full irrigation). Irrigation treatments increased oil yield compared to rainfed conditions (T1 + 58%, T2 + 66% and T3 + 74%, representing average values for both studied years). All olive oil samples were of extra quality. Irrigation led to a decrease in carotenoids, volatiles, polyunsaturated fatty acids and linolenic acid contents, with no difference found among irrigation treatments. Total phenols and secoiridoids concentration was not affected by irrigation, indicating that similar oil quality could be achieved with less demand on the water supply. Obtained results could help producers to define a suitable irrigation management in particular conditions of ameliorate karst.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Deficit irrigation (T1) increased oil yield by 58% compared with rainfed conditions.
- Taxon
- Olive trees
Olea europaeae1 - Treatment
- deficit irrigatione3
- Outcome
- oil yielde2
- Direction
- increasede2
- Value
- 58%e2
- Comparator
- rainfed conditionse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Olive trees were subjected to rainfed conditions”
e2“Irrigation treatments increased oil yield compared to rainfed conditions (T1 + 58%, T2 + 66% and T3 + 74%, representing average values for both studied years)”
e3“T1—deficit irrigation representing the usual producer’s practice”
Claim · model-written summary
Regulated deficit irrigation (T2) increased oil yield by 66% compared with rainfed conditions.
- Taxon
- Olive treesOlea europaeae1
- Treatment
- regulated deficit irrigatione4
- Outcome
- oil yielde2
- Direction
- increasede2
- Value
- 66%e2
- Comparator
- rainfed conditionse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Olive trees were subjected to rainfed conditions”
e2“Irrigation treatments increased oil yield compared to rainfed conditions (T1 + 58%, T2 + 66% and T3 + 74%, representing average values for both studied years)”
e4“T2—regulated deficit irrigation in respect to phenological stages”
Claim · model-written summary
Full irrigation (T3) increased oil yield by 74% compared with rainfed conditions.
- Taxon
- Olive treesOlea europaeae1
- Treatment
- full irrigatione5
- Outcome
- oil yielde2
- Direction
- increasede2
- Value
- 74%e2
- Comparator
- rainfed conditionse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Olive trees were subjected to rainfed conditions”
e2“Irrigation treatments increased oil yield compared to rainfed conditions (T1 + 58%, T2 + 66% and T3 + 74%, representing average values for both studied years)”
e5“T3—full irrigation”
Claim · model-written summary
Irrigation decreased carotenoids, volatiles and polyunsaturated fatty acids in the oil.
- Taxon
- Olive treesOlea europaeae1
- Treatment
- Irrigatione6
- Outcome
- carotenoids, volatiles, polyunsaturated fatty acidse6
- Direction
- decreasee6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Olive trees were subjected to rainfed conditions”
e6“Irrigation led to a decrease in carotenoids, volatiles, polyunsaturated fatty acids and linolenic acid contents, with no difference found among irrigation treatments”
Claim · model-written summary
Irrigation decreased linolenic acid content in the oil.
- Taxon
- Olive treesOlea europaeae1
- Treatment
- Irrigatione6
- Outcome
- linolenic acid contentse6
- Direction
- decreasee6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Olive trees were subjected to rainfed conditions”
e6“Irrigation led to a decrease in carotenoids, volatiles, polyunsaturated fatty acids and linolenic acid contents, with no difference found among irrigation treatments”
Claim · model-written summary
Total phenols and secoiridoids concentration was not affected by irrigation.
- Taxon
- Olive treesOlea europaeae1
- Treatment
- irrigatione7
- Outcome
- Total phenols and secoiridoids concentratione7
- Direction
- not affectede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Olive trees were subjected to rainfed conditions”
e7“Total phenols and secoiridoids concentration was not affected by irrigation”
Claim · model-written summary
Similar oil quality could be achieved with less water supply.
- Taxon
- Olive treesOlea europaeae1
- Outcome
- similar oil qualitye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Olive trees were subjected to rainfed conditions”
e2“similar oil quality could be achieved with less demand on the water supply”
Claim · model-written summary
All olive oil samples were of extra quality.
- Taxon
- oliveOlea europaeae0
- Outcome
- extra qualitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All olive oil samples were of extra quality”
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
- negative
14 papers more in this group
See all 18 papers →irrigation · quality: oil · Olea europaea (common olive)Positive and negative results
14 papers in the same direction as this paper · 14 in the opposite direction · 2 reporting no difference from an alternative
- positive
- positive
- no effect
27 papers more in this group
See all 31 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.