Long-term evaluation of yield components of young olive trees during the onset of fruit production under different irrigation regimes

Caruso, Giovanni; Rapoport, Hava F.; Gucci, Riccardo

doi:10.1007/s00271-011-0286-0

Cited by 69 publications

(116 citation statements)

References 21 publications

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“…Therefore, the present work suggests that the fruit growth could be less sensitive to water stress than vegetative growth in olive trees. Caruso et al (2013) reported in a young olive orchard that the yield differences between full and deficit irrigation in a four seasons experiments was due to a decrease in the tree size since the fruit weight and the efficiency of yield for tree size was similar.…”

Section: Discussionmentioning

confidence: 95%

Changes in the physiological response between leaves and fruits during a moderate water stress in table olive trees

Girón

Corell

Galindo

et al. 2015

Agricultural Water Management

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© 2014 Elsevier B.V. Pit hardening period is the phenological stage when water stress is recommended in regulated deficit irrigation (RDI) in olive trees. In table olive trees, fruit growth is a very important process which could affect the final profit of the yield. RDI scheduling based on water status measurements could improve water management, but accurate threshold values are needed. Previous works in low fruit load conditions suggested -1.8MPa of midday stem water potential as >first step> of water stress level where no variations of fruit growth have been detected. The aim of this work is to describe the physiological response of table olive trees with a significant yield in a moderate water stress conditions during pit hardening period. Water relations of Control (no water stress) trees and Stressed trees were studied in a mature table olive orchard in Seville (Spain). Control trees were irrigated with 100% of ETc and values around field capacity were measured. Irrigation in Stressed trees was withdrawn during pit hardening period, and they were irrigated as Control in the rest of the experiment. Fruit growth was not affected until the last days of the deficit period, though midday stem water potential and maximum leaf conductance measurements reached minimum values a few days after the beginning of the water stress period. Such responses suggest two phases in the water stress period. At the beginning of the experiment, the physiological response of the trees (osmotic adjustment and trunk dehydration in the present work) compensated the decrease in water potential. In this phase, leaves and fruits are similar water sink in the shoots. During the last days of the drought period, the reduction of the osmotic adjustment and the greater decrease of fruit water potential transform fruits in more strength water sink than leaves. These changes produced a decrease in the fruit growth. The recovery, though it was not complete, increase fruit size as the same level than Control.Ministerio de Economía y Competitividad AGL2010-19201-CO4-03 y AGL2013-45922-C2-1-RAECID A1/035430/1

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Section: Discussionmentioning

confidence: 95%

Changes in the physiological response between leaves and fruits during a moderate water stress in table olive trees

Girón

Corell

Galindo

et al. 2015

Agricultural Water Management

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“…The soil was a sandy‐loam permanently covered with a natural green cover. Canopies were trained to a free vase training system formed by a single trunk and three to five primary branches …”

Section: Methodsmentioning

confidence: 99%

Irrigation and fruit canopy position modify oil quality of olive trees (cv. Frantoio)

et al. 2017

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“…On the other hand, data of soil cover at the end of the 553 experiment suggested that there was a slight reduction in crown volume, which could 554 explain part of the trends towards yield reductions in 2013 in the RDI-12 treatment. 555 Caruso et al (2013) suggested that, in young olive trees, the most important differences 556 between irrigation treatments were related to crown volume. In the present work, the 557 absence of pruning during 2012 and 2013 allowed estimating the influence of growth.…”

Section: Effect Of Regulated Deficit Irrigation In Table Olive Yield 547mentioning

confidence: 99%

Feasibility of trunk diameter fluctuations in the scheduling of regulated deficit irrigation for table olive trees without reference trees

Girón

Corell

Martín-Palomo

et al. 2015

Agricultural Water Management

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PreprintRegulated deficit irrigation (RDI) results are affected by the actual water stress level reached during the treatments. The irrigation scheduling based on water status measurements, such as trunk diameter fluctuations, can control in an accurate way the water restrictions. However, the number of works that use these indicators as isolate parameter to control the schedule is scarce in general, and very scarce in olive trees. Building on previous works, the aim of this article is to schedule an RDI strategy in olive trees based on threshold values of maximum daily shrinkage (MDS) and trunk growth rate (TGR) without reference trees. The experiment was performed in a 40 years-old table olive orchard (cv Manzanillo) in Seville (Spain) for 3 years (seasons from 2011 to 2013). Three different irrigation treatments were considered in a completely randomized block design. Control trees were over-irrigated (125% crop evapotranspiration, ETc) in order to obtain fully irrigated conditions. Water stress conditions were applied during Phase II (pit hardening) in the RDI-2 treatment or during Phase II and Phase I (full bloom) in RDI-12. In both RDIs, a treatment recovery (Phase III) was performed before harvest. The trunk diameter fluctuation indicator was selected according to the phenological stage. TGR was used in conditions of full irrigation or moderate water stress level, such as Phase I and Phase III. TGR threshold values based on previous works were selected: 20 mday−1, RDI-2; 10 mday−1, RDI-12 (Phase I) and −5 mday−1, both treatments, Phase III. Only in one season RDI-2 was scheduled with TGR values (−10 mday−1) during Phase II. MDS threshold values were determined as the ratio between measured MDS and fully irrigated MDS (the so called MDS signal). The latter was estimated from a baseline. During Phase II, RDI-2 was irrigated with a threshold value of 0.9, while RDI-12 was irrigated with a threshold value of 0.75. MDS signal was not useful for most of the period considered and it did not agree well with fruit drop or fruit size. Conversely, the average of TGR during Phase II was significantly linked to fruit drop and fruit size, and so were the midday stem water potential and stress integral. Recommendations about the management of TGR are discussed. The water stress level in the experiments was moderate and no significant differences in yield were found. However, the trend of yield reduction in RDI-12 was likely related with a fruit drop and a reduction in crown volume. The yield quality did not decrease in the RDIs treatments, on the contrary, pulp:stone ratio improved significantly in some of the seasons

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Long-term evaluation of yield components of young olive trees during the onset of fruit production under different irrigation regimes

Cited by 69 publications

References 21 publications

Changes in the physiological response between leaves and fruits during a moderate water stress in table olive trees

Changes in the physiological response between leaves and fruits during a moderate water stress in table olive trees

Irrigation and fruit canopy position modify oil quality of olive trees (cv. Frantoio)

Feasibility of trunk diameter fluctuations in the scheduling of regulated deficit irrigation for table olive trees without reference trees

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