Abstract
Olive trees are extremely drought-resistant species. This particularity could be used to reduce water needs in regulated deficit irrigation scheduling. However, the yield response to water deficit is linked to the moment and the level of water stress imposed. Pit hardening has been commonly used as the stage to decrease irrigation, but it is not measured under field conditions. The aim of this work is to describe the impact of water stress conditions on yield response for table olive trees, considering an accurate determination of the endocarp development. The experiment was performed from the 2020 to the 2023 seasons on a two-year-old super-high density table olive orchard (cv Manzanilla de Sevilla). The three irrigation treatments (six repetitions) were: Control, no water stress conditions throughout the season in 2020 and 2021, and mild water stress to reduce vigour in 2022 and 2023; Regulated deficit irrigation (RDI), based on a moderate to severe water stress during pit hardening, using midday stem water potential measurements; and Rainfed. Endocarp development was established using the pit-breaking pressure throughout the 2021, 2022 and 2023 seasons. Water relations, vegetative growth, number of inflorescence and fruits, yield and fruit quality were measured during the experiment. Crown volume limited yield in Rainfed treatments but not in RDI, compared to Control. The number of inflorescences and inflorescence set was not affected in RDI and Rainfed, only reduced in severe water stress in 2023. RDI presented a similar yield response to Control, with a reduction of 50 % on applied water and a significant more negative midday stem water potential. The Rainfed trees were unsuitable for table production because rehydration did not recover fruit size enough to be commercial. Endocarp maintained the capacity of growing until the end of the season. • Crown volume limited yield response in Rainfed trees. • Small reductions in yield in RDI was related with the period of rehydration. • A significant relationship between stress integral and inflorescence set was adjusted. • Severe water stress during Phase II reduce the inflorescence next season. • Endocarp growth could recover until the end of the season, just before harvest.
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Claims 11
Claim · model-written summary
Crown volume limited rainfed yield relative to control but not RDI yield.
Verbatim
t0“table olive”
e0“Crown volume limited yield in Rainfed treatments but not in RDI, compared to Control.”
Claim · model-written summary
Inflorescence number and set were unaffected by RDI and rainfed management except severe 2023 stress.
- Taxon
- table olivet0
- Treatment
- RDI and Rainfede0
- Outcome
- number of inflorescences and inflorescence sete0
- Direction
- not affectede0
Not reportedComparator
Verbatim
t0“table olive”
e0“The number of inflorescences and inflorescence set was not affected in RDI and Rainfed, only reduced in severe water stress in 2023.”
Claim · model-written summary
Severe water stress in 2023 reduced inflorescence number and set.
- Taxon
- table olivet0
- Treatment
- severe water stress in 2023e0
- Outcome
- number of inflorescences and inflorescence sete0
- Direction
- reducede0
Not reportedComparator
Verbatim
t0“table olive”
e0“The number of inflorescences and inflorescence set was not affected in RDI and Rainfed, only reduced in severe water stress in 2023.”
Claim · model-written summary
RDI yield response was similar to control.
Verbatim
t0“table olive”
e0“RDI presented a similar yield response to Control”
Claim · model-written summary
RDI reduced applied water by 50%.
Verbatim
t0“table olive”
e0“RDI presented a similar yield response to Control, with a reduction of 50 % on applied water and a significant more negative midday stem water potential.”
Claim · model-written summary
RDI had significantly more negative midday stem water potential.
Verbatim
t0“table olive”
e0“RDI presented a similar yield response to Control, with a reduction of 50 % on applied water and a significant more negative midday stem water potential.”
Claim · model-written summary
Rainfed trees were unsuitable for table production because rehydration did not restore commercial fruit size.
Verbatim
t0“table olive”
e0“The Rainfed trees were unsuitable for table production because rehydration did not recover fruit size enough to be commercial.”
Claim · model-written summary
Endocarps retained growth capacity until season end.
Verbatim
t0“table olive”
e0“Endocarp maintained the capacity of growing until the end of the season.”
Claim · model-written summary
Small RDI yield reductions related to the rehydration period.
Verbatim
t0“table olive”
e0“Small reductions in yield in RDI was related with the period of rehydration.”
Claim · model-written summary
Stress integral was significantly related to inflorescence set.
Not reportedDirection
Verbatim
t0“table olive”
e0“A significant relationship between stress integral and inflorescence set was adjusted.”
Claim · model-written summary
Severe Phase II water stress reduced inflorescences in the following season.
- Taxon
- table olivet0
- Treatment
- Severe water stress during Phase IIe0
- Outcome
- inflorescence next seasone0
- Direction
- reducee0
Not reportedComparator
Verbatim
t0“table olive”
e0“Severe water stress during Phase II reduce the inflorescence next season.”
The same questions in other papers
irrigation · yield · Olea europaea (common olive)Results differ
26 papers in the same direction as this paper · 26 in the opposite direction
- negative
- no effect
- positive
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See all 53 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.