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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

Published on Feb 22, 2019in Water 2.07
· DOI :10.3390/w11020383
Teresa A. Paço10
Estimated H-index: 10
,
Paula Paredes18
Estimated H-index: 18
+ 2 AuthorsFrancisco L. Santos10
Estimated H-index: 10
Abstract
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 0.25) 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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References74
Published on Oct 1, 2015in Agricultural and Forest Meteorology 4.04
Teemu Hölttä21
Estimated H-index: 21
(University of Helsinki),
Tapio Linkosalo18
Estimated H-index: 18
(University of Helsinki)
+ 2 AuthorsEero Nikinmaa37
Estimated H-index: 37
(University of Helsinki)
Abstract Granier sap flow method is a simple and easily applicable method to monitor sap flow in trees in field conditions, and is thus in wide use. However, it has been suggested that the method is slow to capture transient changes in actual sap flux density due to heat storage and release within the stem. We show here how this may lead to biases in the estimation of the dynamics of sap flux density especially at low flow rates when thermal diffusivity is low. We also demonstrate how the tradit...
15 Citations Source Cite
Published on Jan 1, 2016in Agricultural Water Management 3.18
Carmen M. Padilla-Díaz7
Estimated H-index: 7
(Spanish National Research Council),
Celia M. Rodriguez-Dominguez11
Estimated H-index: 11
(University of Seville)
+ 2 AuthorsJ.E. Fernández20
Estimated H-index: 20
(Spanish National Research Council)
Regulated deficit irrigation (RDI) has been proposed as one of the most promising irrigation strategies for hedgerow fruit orchards with high plant densities. Scheduling a RDI strategy, however, is highly demanding, since the targeted water savings must be achieved at the same time that episodes of excessive water stress are avoided when the crop is most sensitive to drought. Here we tested an approach to schedule a RDI strategy supplying 45% of the crop irrigation needs, specially designed for ...
15 Citations Source Cite
Published on Dec 1, 2015in Industrial Crops and Products 3.85
María Fandiño6
Estimated H-index: 6
(University of Santiago de Compostela),
J.L. Olmedo1
Estimated H-index: 1
+ 6 AuthorsLuis S. Pereira50
Estimated H-index: 50
(University of Lisbon)
Abstract This study was conducted during three seasons (2012–2014) in an experimental hop yard at Mabegondo, Galicia, NW Spain. The research aimed at calibrating and validating the soil water balance model SIMDualKc for Humulus lupulus L. cv. ‘Nugget’. The model computes the soil water balance using the dual K c approach, thus partitioning crop evapotranspiration (ET c ) into crop transpiration, ground cover transpiration and soil evaporation. Calibration and validation were performed using TDR ...
10 Citations Source Cite
Published on Sep 1, 2015in Agricultural Water Management 3.18
Luis S. Pereira50
Estimated H-index: 50
,
Paula Paredes18
Estimated H-index: 18
+ 1 AuthorsM. Manuela Neves4
Estimated H-index: 4
(University of Lisbon)
Two contrasting rainfall barley seasons, dry (2012) and wet (2013), were used to parameterize and assess the performance of the SIMDualKc and AquaCrop models. Field data were obtained from malt barley cropped in a farmer’s field in Ribatejo, Portugal. SIMDualKc applies the dual crop coefficient approach for computing and partitioning crop evapotranspiration (ET), while AquaCrop uses an empirical approach to estimate potential crop transpiration (Tc) and soil evaporation (Es) depending upon the c...
30 Citations Source Cite
Published on Jan 1, 2016in Irrigation Science 1.65
Rafael López-Olivari2
Estimated H-index: 2
,
Samuel Ortega-Farías17
Estimated H-index: 17
(University of Talca),
Carlos Poblete-Echeverría11
Estimated H-index: 11
(University of Talca)
To evaluate the partitioning of net radiation (R n) and actual evapotranspiration (ET a), measurements of R n, sensible heat flux (H), soil heat flux (G), latent heat flux (LE), reference evapotranspiration (ET o), transpiration (T p) and soil evaporation (E s) were taken during the 2009/2010 and 2010/2011 growing seasons on a flat and uniform olive (cv. Arbequina) orchard, located in the Pencahue Valley, Region del Maule, Chile (35°23′ LS; 71°44′ LW; 96 m above sea level). Olive trees were trai...
14 Citations Source Cite
Published on Dec 1, 2014in Biosystems Engineering 2.13
Isabel Pôças10
Estimated H-index: 10
(Instituto Superior de Agronomia),
Teresa A. Paço10
Estimated H-index: 10
(Instituto Superior de Agronomia)
+ 6 AuthorsRichard G. Allen46
Estimated H-index: 46
(University of Idaho)
METRIC™ is a satellite-based surface energy balance model aimed at estimating and mapping crop evapotranspiration (ET). It has been applied to a large range of vegetation types, mostly annual crops. When applied to anisotropic woody canopies, such as olive orchards, extensions are required to algorithms for estimating the leaf area index (LAI), surface temperature, and momentum roughness length ( Z om ). The computation of the radiometric surface temperature needs to consider a three-source cond...
21 Citations Source Cite
Published on Mar 1, 2009in Biosystems Engineering 2.13
Alice F. Ramos3
Estimated H-index: 3
(Spanish National Research Council),
Francisco L. Santos10
Estimated H-index: 10
(Spanish National Research Council)
To improve the scheduling of irrigation for low-density olive trees ( Olea europaea L.) grown in a typical Mediterranean environment of Southern Portugal, and to clarify the mechanisms of water uptake by trees, transpiration, soil water status and stomatal response to water deficit were measured in an olive orchard. Olive trees of cv. Cordovil were subject to three irrigation treatments: full-rate irrigation, sustained deficit irrigation (SDI) providing for approximately 60% of water applied at ...
27 Citations Source Cite
Published on Oct 1, 2014in Agricultural Water Management 3.18
Lazar Tanasijevic2
Estimated H-index: 2
,
Mladen Todorovic12
Estimated H-index: 12
+ 2 AuthorsPiero Lionello28
Estimated H-index: 28
(University of Salento)
Abstract The Mediterranean basin is the largest world area having specific climatic conditions suitable for olive cultivation, which has a great socio-economic importance in the region. However, the Mediterranean might be particularly affected by climate change, which could have extensive impacts on ecosystems and agricultural production. This work focussed on the climate change impact on olive growing in the Mediterranean region considering the possible alterations of cultivable areas, phenolog...
48 Citations Source Cite
Published on Mar 1, 2013in Agricultural Water Management 3.18
Giovanni Rallo11
Estimated H-index: 11
(Saga Group),
Giuseppe Provenzano21
Estimated H-index: 21
(Saga Group)
The knowledge of crop response to water stress is crucial to predict transpiration reductions under limited soil water conditions and for a rational scheduling of irrigation.
21 Citations Source Cite
Published on Jan 1, 2012in Agricultural Water Management 3.18
Ricardo D. Rosa6
Estimated H-index: 6
(Technical University of Lisbon),
Paula Paredes18
Estimated H-index: 18
(Technical University of Lisbon)
+ 4 AuthorsRichard G. Allen46
Estimated H-index: 46
(University of Idaho)
Abstract Irrigation planning and scheduling require the availability of modeling tools that are accurate, quick and easy to use. The crop coefficient ( K c )-reference evapotranspiration (ET) method is a traditional method for estimating ET, but has become relatively complicated with the introduction of the dual K c procedure. The dual crop coefficient approach ( K cb + K e ) gives a better estimation of daily crop evapotranspiration because it separately considers soil evaporation and crop tran...
77 Citations Source Cite
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