Abstract
We report the results of a study carried out in a ‘Manzanilla de Sevilla’ olive orchard near Seville, Spain, where the influence of different fertigation treatments on oil chemical composition was considered. Four treatments were established: control (no fertilizer) and T200, T400, and T600 in which each tree, respectively, received 200, 400, or 600 g N per irrigation season of a 4N–1P–3K complex fertilizer applied daily from 1999 to 2003. Results shown here correspond to the last 2 years of the experiment, 2002 and 2003. Fruits were sampled at the beginning of ripeness at the “green” stage. Fruit water content increased with the amount of fertilizer, probably because of the increase of potassium in the pulp. Oil content was unaffected by the treatments, but oil yield increased with the fertilizer dose in 2003 as a result of the number of fruits per tree. Polyphenol content, which is related to antioxidant oil capacity, K 225 (bitterness), and oxidative stability were lower in the oils made from trees receiving greater fertilizer doses. The monounsaturated fatty acid content, in particular oleic acid, decreased with increasing amounts of applied fertilizers, whereas polyunsaturated fatty acids, in particular linoleic acid, increased with it.
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Claims 8
Claim · model-written summary
Fruit water content of olive increased with the amount of fertilizer.
- Taxon
- olive
Olea europaeae1 - Treatment
- the amount of fertilizere2
- Outcome
- Fruit water contente2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“We report the results of a study carried out in a ‘Manzanilla de Sevilla’ olive orchard near Seville, Spain, where the influence of different fertigation treatments on oil chemical composition was considered”
e2“Fruit water content increased with the amount of fertilizer, probably because of the increase of potassium in the pulp”
Claim · model-written summary
Oil content of olive was unaffected by the fertigation treatments.
- Taxon
- oliveOlea europaeae1
- Treatment
- the treatmentse3
- Outcome
- Oil contente3
- Direction
- unaffectede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“We report the results of a study carried out in a ‘Manzanilla de Sevilla’ olive orchard near Seville, Spain, where the influence of different fertigation treatments on oil chemical composition was considered”
e3“Oil content was unaffected by the treatments, but oil yield increased with the fertilizer dose in 2003 as a result of the number of fruits per tree”
Claim · model-written summary
Oil yield of olive increased with the fertilizer dose in 2003.
- Taxon
- oliveOlea europaeae1
- Treatment
- fertilizer dosee3
- Outcome
- oil yielde3
- Direction
- increasede3
- Qualifier
- in 2003e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“We report the results of a study carried out in a ‘Manzanilla de Sevilla’ olive orchard near Seville, Spain, where the influence of different fertigation treatments on oil chemical composition was considered”
e3“Oil content was unaffected by the treatments, but oil yield increased with the fertilizer dose in 2003 as a result of the number of fruits per tree”
Claim · model-written summary
Polyphenol content of olive oil was lower in oils from trees receiving greater fertilizer doses.
- Taxon
- oliveOlea europaeae1
- Treatment
- greater fertilizer dosese4
- Outcome
- Polyphenol contente4
- Direction
- lowere4
- Qualifier
- which is related to antioxidant oil capacitye4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“We report the results of a study carried out in a ‘Manzanilla de Sevilla’ olive orchard near Seville, Spain, where the influence of different fertigation treatments on oil chemical composition was considered”
e4“Polyphenol content, which is related to antioxidant oil capacity, K 225 (bitterness), and oxidative stability were lower in the oils made from trees receiving greater fertilizer doses”
Claim · model-written summary
K 225 (bitterness) of olive oil was lower in oils from trees receiving greater fertilizer doses.
- Taxon
- oliveOlea europaeae1
- Treatment
- greater fertilizer dosese4
- Outcome
- K 225 (bitterness)e4
- Direction
- lowere4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“We report the results of a study carried out in a ‘Manzanilla de Sevilla’ olive orchard near Seville, Spain, where the influence of different fertigation treatments on oil chemical composition was considered”
e4“Polyphenol content, which is related to antioxidant oil capacity, K 225 (bitterness), and oxidative stability were lower in the oils made from trees receiving greater fertilizer doses”
Claim · model-written summary
Oxidative stability of olive oil was lower in oils from trees receiving greater fertilizer doses.
- Taxon
- oliveOlea europaeae1
- Treatment
- greater fertilizer dosese4
- Outcome
- oxidative stabilitye4
- Direction
- lowere4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“We report the results of a study carried out in a ‘Manzanilla de Sevilla’ olive orchard near Seville, Spain, where the influence of different fertigation treatments on oil chemical composition was considered”
e4“Polyphenol content, which is related to antioxidant oil capacity, K 225 (bitterness), and oxidative stability were lower in the oils made from trees receiving greater fertilizer doses”
Claim · model-written summary
Monounsaturated fatty acid content of olive oil decreased with increasing fertilizer amounts.
- Taxon
- oliveOlea europaeae1
- Treatment
- increasing amounts of applied fertilizerse5
- Outcome
- The monounsaturated fatty acid contente5
- Direction
- decreasede5
- Qualifier
- in particular oleic acide5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“We report the results of a study carried out in a ‘Manzanilla de Sevilla’ olive orchard near Seville, Spain, where the influence of different fertigation treatments on oil chemical composition was considered”
e5“The monounsaturated fatty acid content, in particular oleic acid, decreased with increasing amounts of applied fertilizers, whereas polyunsaturated fatty acids, in particular linoleic acid, increased with it”
Claim · model-written summary
Polyunsaturated fatty acid content of olive oil increased with increasing fertilizer amounts.
- Taxon
- oliveOlea europaeae1
- Treatment
- increasing amounts of applied fertilizerse5
- Outcome
- polyunsaturated fatty acidse5
- Direction
- increasede5
- Qualifier
- in particular linoleic acide5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“We report the results of a study carried out in a ‘Manzanilla de Sevilla’ olive orchard near Seville, Spain, where the influence of different fertigation treatments on oil chemical composition was considered”
e5“The monounsaturated fatty acid content, in particular oleic acid, decreased with increasing amounts of applied fertilizers, whereas polyunsaturated fatty acids, in particular linoleic acid, increased with it”
The same questions in other papers
fertilization · quality: oil · Olea europaea (common olive)Positive and negative results
10 papers in the same direction as this paper · 4 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- no effect
12 papers more in this group
See all 16 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.