Abstract
Selected superior olive cultivars cultivated on a large scale in various countries in the Mediterranean region were tested in a special saline irrigation experimental plot established in 1997 in the center of the semiarid Israeli Negev area. The plot comprised two subplots containing the same 12 olive cultivars in a mirror image design. One subplot was drip-irrigated with tap water (1.2 dS·m −1 ) and the second with moderate saline water (4.2 dS·m −1 ). All cultivation practices applied to the two subplots were similar in terms of fertilization, irrigation, soil leaching, and so on. The present study summarizes the vegetative and reproductive response of the tested olive cultivar trees during the 5 years after they reached maturation and full yield. Evaluation of trunk growth, olive yield, oil percentage, olive oil yield, and fatty acid composition of the oil, sodium and chloride leaf levels, and soil fractions up to 90 cm enabled characterization and comparison of the horticultural performance of the various olive cultivars intensively cultivated with the two tested irrigation treatments. The data clearly showed a significant difference between the tested cultivars in terms of growth, yield, and oil parameters. Grouping the tested cultivars in terms of olive oil production yielded the following three groups: Group A—‘Barnea’, ‘Maalot’, and ‘Picholin’—their average oil yield ranged from 8 to 10 kg/tree; Group B—‘Souri’, ‘Frantoio’, ‘Leccino’, ‘Arbequina’, ‘Picual’, ‘Kalamata’, ‘Koroneiki’, and ‘Picholin di Morroco’—their average oil yield ranged from 5 to 8 kg/tree; and Group C—‘Picudo’—ranged from 3 to 4 kg/tree. Saline irrigation treatment at 4.2 dS·m −1 demonstrated only a low rate of retardation effect on growth or yield of olive trees compared with water at 1.2 dS·m −1 of the same cultivar in each subplot. The data obtained from the present study suggest that efficient productive cultivation of mature olive cultivars in Israeli Negev semiarid conditions, irrigated with moderate saline water, is closely related to proper soil leaching methodology and maintaining the soil electrical conductivity level in the root zone in a range lower than 6 dS·m −1 .
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Claims 6
Claim · model-written summary
Olive cultivars differed significantly in growth, yield and oil parameters.
- Taxon
- olive
Olea europaeae0 - Material
- tested cultivarse1
- Outcome
- growth, yield, and oil parameterse1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Selected superior olive cultivars cultivated on a large scale in various countries in the Mediterranean region”
e1“The data clearly showed a significant difference between the tested cultivars in terms of growth, yield, and oil parameters”
Claim · model-written summary
Olive cultivars in group A averaged 8 to 10 kg oil per tree.
- Taxon
- oliveOlea europaeae0
- Outcome
- average oil yielde2
- Value
- 8 to 10 kg/treee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Selected superior olive cultivars cultivated on a large scale in various countries in the Mediterranean region”
e2“their average oil yield ranged from 8 to 10 kg/tree”
Claim · model-written summary
Olive cultivars in group B averaged 5 to 8 kg oil per tree.
- Taxon
- oliveOlea europaeae0
- Outcome
- average oil yielde3
- Value
- 5 to 8 kg/treee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Selected superior olive cultivars cultivated on a large scale in various countries in the Mediterranean region”
e3“their average oil yield ranged from 5 to 8 kg/tree”
Claim · model-written summary
Olive cultivar Picudo (group C) averaged 3 to 4 kg oil per tree.
- Taxon
- oliveOlea europaeae0
- Outcome
- oil parameterse1
- Value
- 3 to 4 kg/treee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Selected superior olive cultivars cultivated on a large scale in various countries in the Mediterranean region”
e4“ranged from 3 to 4 kg/tree”
e1“The data clearly showed a significant difference between the tested cultivars in terms of growth, yield, and oil parameters”
Claim · model-written summary
Saline irrigation at 4.2 dS/m showed only a low rate of retardation effect on olive growth or yield compared with 1.2 dS/m water.
- Taxon
- oliveOlea europaeae0
- Treatment
- Saline irrigation treatment at 4.2e6
- Outcome
- growth or yielde5
- Direction
- retardatione5
- Qualifier
- low ratee5
- Comparator
- watere5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Selected superior olive cultivars cultivated on a large scale in various countries in the Mediterranean region”
e5“demonstrated only a low rate of retardation effect on growth or yield of olive trees compared with water”
e6“Saline irrigation treatment at 4.2”
Claim · model-written summary
Maintaining soil electrical conductivity in the root zone below 6 dS/m is recommended for productive cultivation of mature olive cultivars irrigated with moderately saline water.
- Taxon
- oliveOlea europaeae2
- Outcome
- maintaining the soil electrical conductivity level in the root zonee7
- Qualifier
- lower than 6e7
- Setting
- Israeli Negev semiarid conditionse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“maintaining the soil electrical conductivity level in the root zone in a range lower than 6”
e2“suggest that efficient productive cultivation of mature olive cultivars in Israeli Negev semiarid conditions”
The same questions in other papers
irrigation · yield · Olea europaea (common olive)Results differ
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See all 6 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.