A regulated deficit irrigation strategy for hedgerow olive orchards with high plant density

Fernández, J.E.; Perez-Martin, Alfonso; Torres‐Ruiz, José M.; Cuevas, M.V.; Rodriguez‐Dominguez, Celia M.; Elsayed-Farag, S.; Morales‐Sillero, Ana; García, José María; Hernández‐Santana, Virginia; Díaz-Espejo, Antonio

doi:10.1007/s11104-013-1704-2

Cited by 115 publications

(105 citation statements)

References 53 publications

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“…For deficit irrigation (DI) scheduling routines applied to olives to reduce production costs, improve fruit quality, and save water [1], such knowledge is particularly relevant to avoid severe water stress on sensitive phases of the growing period [2][3][4][5][6], as the responses to DI regimes are often variable, depending on the timing and severity of water deficits [2,7]. So, the precise monitoring of actual olive water use throughout the irrigation cycle is of utmost importance.…”

Section: Introductionmentioning

confidence: 99%

Assessing Olive Evapotranspiration Partitioning from Soil Water Balance and Radiometric Soil and Canopy Temperatures

Santos

2018

Agronomy

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Evapotranspiration (ET c ) partitioning and obtaining of FAO56 dual crop coefficient (K c ) for olive was carried out with the SIMDualKc software application for root zone and topsoil soil water balance based on the dual crop coefficients. A simplified two source-energy balance model (STSEB), based on daily remotely sensed soil and canopy thermal infrared data and retrieval of surface fluxes, also provided information on partitioning ET c for the olive orchard. Both models were calibrated and validated with ground-based, sap flow-derived transpiration rates, and their performance was compared in partitioning ET c for incomplete cover, intensive olive grown in orchards (≤300 trees ha −1 ). The SIMDualKc proved adequate in partitioning ET c . The STSEB model underestimated ET c mostly by inadequately simulating soil evaporation and its contribution to the total latent heat flux. Such results suggest difficulties in using information from the STSEB algorithm for assessing ET c and dual K c crop coefficients of intensive olive orchards with incomplete ground cover.

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Section: Introductionmentioning

confidence: 99%

Assessing Olive Evapotranspiration Partitioning from Soil Water Balance and Radiometric Soil and Canopy Temperatures

Santos

2018

Agronomy

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“…Moreover, DI limits excessive growth, which is important in SHD orchards, where tree size has to be controlled for both optimum illumination and mechanical harvesting . In this line, authors such as Fernández et al (2013), Gómez-del-Campo (2013) and Padilla-Díaz et al (2016) have demonstrated that regulated deficit irrigation (RDI) can be a suitable strategy to improve irrigation water management and water productivity in SHD olive orchards. RDI strategies are based on avoiding excessive water stress in the periods of the growing cycle when the crop is highly sensitive to drought, so the effective monitoring of plant water status along the crop growing cycle becomes crucial (Poblete-Echeverría et al, 2014;Fernández 2014a).…”

Section: Introductionmentioning

confidence: 99%

Assessing plant water status in a hedgerow olive orchard from thermography at plant level

García-Tejero

Hernández

Padilla‐Díaz

et al. 2017

Agricultural Water Management

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a b s t r a c tWater scarcity is the most limiting factor in many irrigated areas of Mediterranean countries such as South Spain. Olive growing has been traditionally associated to rain-fed agriculture, although irrigation and practices related to intensive agriculture have been progressively introduced, requiring a more precise irrigation scheduling to save water. Thermal imaging is among the alternatives to assess the crop water status, especially when deficit irrigation (DI) strategies are applied. However, this technique requires of new advances to be more user friendly and robust for practical usage. The aims of this study were: i) to define threshold values of canopy temperature (T C ), Crop Water Stress Index (CWSI) and the temperature difference between canopy and the surrounding air ( T canopy-air ) for the assessment of the olive water status when a DI strategy is applied; ii) to define the best time of the day and the best area of the canopy to carry out thermal measurements, and iii) to obtain relationships between thermal indicators and main physiological parameters useful to estimate the crop water status from thermal data. The trial was conducted during 2015, in a hedgerow olive orchard (SW Spain) with 8-year-old trees (Olea europaea L., cv. Arbequina), under three irrigation regimes: a full-irrigation treatment (FI) and two regulated deficit irrigation treatments aimed to supplying 45% of the irrigation needs. In one of them, irrigation was scheduled from leaf turgor pressure related measurements (45RDI TP ). In the other, the crop coefficient approach was used to schedule irrigation (45RDI CC ). Significant correlations between Tc versus stem water potential (« st ) and leaf gas-exchange parameters (stomatal conductance to water vapour, g s ; net CO 2 assimilation, A N ; transpiration, E) were obtained (p ≤ 0.05), in particular from measurements taken at 10:30 GMT in the lower part of the sunlit side of the canopy. Moreover, the relationships between both T canopy-air and CWSI with the monitored physiological variables were very robust. We concluded that values of T canopy-air higher than 0 • C and values of CWSI up to 0.2 reliably reflect the plant water stress. Our results, therefore, suggest that both T canopy-air and CWSI measured at midday provide reliable information on the tree water status and are useful to schedule irrigation in hedgerow olive orchards, especially under DI conditions.

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“…It has been reported that the oil extracted from RDI ‘Arbequina’ olives of SHD orchards had a higher oxidative stability and higher phenol content than oils from FI, without any detrimental effect on oil production . Fernandez et al tested one FI treatment and two RDI treatments with the same RDI strategy but with different irrigation levels, replacing 60% and 30%, respectively, of the water supplied in FI. The RDI strategy consisted of keeping the trees close to FI conditions at bloom, at the beginning of pit hardening and in the 3‐week period prior to ripening, which all represent periods identified as being highly sensitive to water stress .…”

Section: Introductionmentioning

confidence: 99%

Virgin olive oil quality of hedgerow ‘Arbequina’ olive trees under deficit irrigation

et al. 2016

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A regulated deficit irrigation strategy for hedgerow olive orchards with high plant density

Cited by 115 publications

References 53 publications

Assessing Olive Evapotranspiration Partitioning from Soil Water Balance and Radiometric Soil and Canopy Temperatures

Assessing Olive Evapotranspiration Partitioning from Soil Water Balance and Radiometric Soil and Canopy Temperatures

Assessing plant water status in a hedgerow olive orchard from thermography at plant level

Virgin olive oil quality of hedgerow ‘Arbequina’ olive trees under deficit irrigation

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