Partitioning of net radiation and evapotranspiration over a superintensive drip-irrigated olive orchard

López-Olivari, Rafael; Ortega-Farías, Samuel; Poblete-Echeverría, Carlos

doi:10.1007/s00271-015-0484-2

Cited by 45 publications

(26 citation statements)

References 54 publications

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“…The approach used may be affected by uncertainties in computing E sim as well as measurements errors affecting both T EC and SF. Nevertheless, The T SF values resulting from the application of Equation 2, which varied between 0.36 and 3.54 mm¨d´1, are comparable to transpiration values reported for other studies on olive orchards [18,59,69].…”

Section: Transpiration From Sap Flow Measurements With the Granier Mesupporting

confidence: 85%

Crop Coefficients and Transpiration of a Super Intensive Arbequina Olive Orchard using the Dual Kc Approach and the Kcb Computation with the Fraction of Ground Cover and Height

Paço

Paredes

Pereira

et al. 2019

Water

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The SIMDualKc model was used to simulate crop water requirements for a super high density olive orchard in the region of Alentejo, Portugal. This model uses the dual crop coefficient approach to estimate and partitioning the actual crop evapotranspiration (ETc act) and therefore to perform the soil water balance. The model was calibrated with 2011 tree transpiration using trunk sap flow measurements and was validated using similar data from 2012 and tested with 2013 data. Low root mean square errors (RMSE < 0.53 mm·d−1) and acceptable modelling efficiency indicators (EF > 0.25) were obtained. Further validation was performed comparing modelled ETc act with eddy covariance measurements. These indicators support the appropriateness of using SIMDualKc to guide irrigation management. The basal crop coefficient (Kcb) curves obtained with SIMDualKc for those 3 years were compared with the Kcb values computed with the Allen and Pereira approach (A&P approach) where Kcb is estimated from the fraction of ground cover and plant height considering an adjustment factor for crop stomatal control (Fr). Fr values were obtained through a trial and error procedure through comparing the Kcb estimated with this approach and with SIMDualKc. The Kcb curves obtained by both methods resulted highly correlated, which indicates that the A&P approach may be used in the irrigation management practice to estimate crop water requirements. Results of performing the soil water balance with SIMDualKc have shown that soil evaporation is a large fraction of ETc act, varying between 41% and 45% for the 3 years under study. Irrigation, applied with a drip system, represented 39 to 56% of ETc act, which shows the great importance of irrigation to achieve the water requirements of super intensive olive orchards. Nevertheless, the analysis has shown that the irrigation management adopted at the orchard produces a water deficit larger than desirable, with a ratio of ETc act to non-stressed crop evapotranspiration (ETc) varying from 70% to 94% during the mid-season, when that ratio for a eustress irrigation management could be around 90%.

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Section: Transpiration From Sap Flow Measurements With the Granier Mesupporting

confidence: 85%

Crop Coefficients and Transpiration of a Super Intensive Arbequina Olive Orchard using the Dual Kc Approach and the Kcb Computation with the Fraction of Ground Cover and Height

Paço

Paredes

Pereira

et al. 2019

Water

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“…LAI was measured biweekly in 20 trees during the study period using a plant canopy analyzer (LAI-2000, LI-COR, Lincoln, NE, USA) with diffuse radiation at sunset. Finally, the plant canopy analyzer was calibrated defoliating 4 trees, where the leaves of each tree were photographed, and then, the total leaf area per tree was measured using a digital image analysis [7,31].…”

Section: Plant Measurementsmentioning

confidence: 99%

“…To reduce the uncertainty associated with error in the LE E and H E measurements, entire days were excluded from the study when the ratios of (H E + LE E ) to (Rn E − G E ) were outside the range of 0.8 and 1.2 [7]. In addition, H E and LE E values were adjusted using the Bowen ratio (β = H E /LE E ) to close the energy balance for measured fluxes as follows [38][39][40]:…”

Section: Data Quality Control and Post-processingmentioning

confidence: 99%

“…This limitation may cause significant errors in the computation of LE i by the model, especially in heterogeneous crops, like grapes and apples, where H could generate a big impact in the orchard energy balance (Equation (1)). In this regard, López-Olivarí et al (2016) [7] indicated that the canopy architecture (tree density, canopy size, LAI, and fc) and training system can have an important effect in the partitioning of Rn and ETa inside an orchard and in the distribution of the energy balance components over the land surface. In addition, Testi et al (2004) [48] indicated that the exchange of energy fluxes (Rn i , G i , H i and LE i ) between soil surface and tree canopy is strongly affected by the orchard architecture and its shading, and the sensible heat flux generated at the soil surface can be a major contributor to the energy balance for sparse woody canopies playing a key role in tree transpiration and stomatal closure [55].…”

Section: Distribution Of Energy Balance Into the Apple Orchardmentioning

confidence: 99%

“…However, the Kc values taken from literature are often not adapted to varying orchard conditions such as soil type, cultivar and climate characteristics [5,6]. In addition, Kc values for complex, heterogeneous canopies such as fruit orchards depend highly on canopy architecture, plant densities, and standard agronomical practices that determine the partitioning of ETa into transpiration and soil evaporation [7]. This issue can produce substantial error in the estimation of orchard water requirements and reduce the water use efficiency, yield and fruit quality [8].…”

Section: Introductionmentioning

confidence: 99%

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Calibration of METRIC Model to Estimate Energy Balance over a Drip-Irrigated Apple Orchard

et al. 2017

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A field experiment was carried out to calibrate and evaluate the METRIC (Mapping EvapoTranspiration at high Resolution Internalized with Calibration) model for estimating the spatial and temporal variability of instantaneous net radiation (Rn i), soil heat flux (G i), sensible heat flux (H i), and latent heat flux (LE i) over a drip-irrigated apple (Malus domestica cv. Pink Lady) orchard located in the Pelarco valley, Maule Region, Chile (35 • 25 20 LS; 71 • 23 57 LW; 189 m.a.s.l.). The study was conducted in a plot of 5.5 hectares using 20 satellite images (Landsat 7 ETM+) acquired on clear sky days during three growing seasons (2012/2013, 2013/2014 and 2014/2015). Specific sub-models to estimate G i , leaf area index (LAI) and aerodynamic roughness length for momentum transfer (Z om) were calibrated for the apple orchard as an improvement to the standard METRIC model. The performance of the METRIC model was evaluated at the time of satellite overpass using measurements of H i and LE i obtained from an eddy correlation system. In addition, estimated values of Rn i , G i and LAI were compared with ground-truth measurements from a four-way net radiometer, soil heat flux plates and plant canopy analyzer, respectively. Validation indicated that LAI, Z om and G i were estimated using the calibrated functions with errors of +2%, +6% and +3% while those were computed using the standard functions with error of +59%, +83%, and +12%, respectively. In addition, METRIC using the calibrated functions estimated H i and LE i with error of +5% and +16%, while using the original functions estimated H i and LE i with error of +29% and +26%, respectively.

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Effect of regulated deficit irrigation during the vegetative growth period on shoot elongation and oil yield components in olive hedgerows (cv. Arbosana) pruned annually on alternate sides in San Juan, Argentina

et al. 2019

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Partitioning of net radiation and evapotranspiration over a superintensive drip-irrigated olive orchard

Cited by 45 publications

References 54 publications

Crop Coefficients and Transpiration of a Super Intensive Arbequina Olive Orchard using the Dual Kc Approach and the Kcb Computation with the Fraction of Ground Cover and Height

Crop Coefficients and Transpiration of a Super Intensive Arbequina Olive Orchard using the Dual Kc Approach and the Kcb Computation with the Fraction of Ground Cover and Height

Calibration of METRIC Model to Estimate Energy Balance over a Drip-Irrigated Apple Orchard

Effect of regulated deficit irrigation during the vegetative growth period on shoot elongation and oil yield components in olive hedgerows (cv. Arbosana) pruned annually on alternate sides in San Juan, Argentina

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