Calibration and validation of AquaCrop for deficit and full irrigation of tomato

Ransford Opoku Darko, Yuan Shouqi, Yan Haofang, Junping Liu, Agnes Abbey

Abstract


The objective of this study was to calibrate and test AquaCrop for tomato (Lycopersicon esculentum) grown under deficit and full irrigation. Two field experiments were carried out in the tropical humid coastal savanna zone in Mfantseman district of the Central Region of Ghana. Data from the first experiment were used to calibrate the model while data obtained from the second experiment were used to validate the model. The calibrated AquaCrop model concentrated on its performance to predict crop yield and seasonal crop water requirement (ETc). Four treatments were investigated: T1 (no irrigation after plant establishment), T2 (50% ETc restoration), T3 (100% ETc restoration up to beginning of flowering, then 50% ETc restoration) and T4 (100% ETc restoration). The results revealed that AquaCrop was able to simulate the yield of tomato for T2-T4 with the exception of Treatment T1 which was simulated with the highest deviation of 45.1%. On the other hand, the model was able to simulate the seasonal water requirements to an appreciable degree in both experiments. It must be pointed out that the calibration of AquaCrop suffered from a lack of data on the progress of crop canopy cover which is a very important parameter used in developing the model.
Keywords: AquaCrop, irrigation, calibration, validation, tomato, water requirements, yield
DOI: 10.3965/j.ijabe.20160903.1812

Citation: Darko R O, Yuan S Q, Yan H F, Liu J P, Abbey A. Calibration and validation of AquaCrop for deficit and full irrigation of tomato. Int J Agric & Biol Eng, 2016; 9(3): 104－110.

Keywords


AquaCrop, irrigation, calibration, validation, tomato, water requirements, yield

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References


Food and Agricultural Organization. World agriculture: towards 2015/2030. Earthscan, 2003. Publications Ltd., London, 432pp.

Rockstrom J, Lannerstad M, Falkenmark M. Assessing the water challenge of a new green revolution in developing countries. P. Natl. Acad. Sci. USA, 2007; 104(15): 6253−6260.

Ridoutt B G, Juliano P, Sanguansri P, Sellahewa J. Consumptive water use associated with food waste: case study of fresh mango in Australia. Hydrol. Earth Syst. Sci. Discuss, 2009; 6: 5085−5114.

Rockstrom J, Falkenmark M, Karlberg L, Hoff H, Rost S, Gerten D. Future water availability for global food production: the potential of green water to build resilience to global change. Water Resources Research 44, 2009. doi: 10.1029/2007WR006767.

Farahani H J, Gabriella I, Oweis T Y. Parameterization and evaluation of the AquaCrop model for full and deficit irrigated cotton. Agronomy Journal, 2009; 101: 469−476.

Garcia-Vila M, Fereres E, Mateos L, Orgaz F, Steduto P. Deficit irrigation optimization of cotton with AquaCrop. Agronomy Journal, 2009; 101: 477−487.

Heng L K, Hsiao T, Evett S, Howell T, Steduto P. Validating the FAO AquaCrop model for irrigated and water deficit field maize. Agronomy Journal, 2009; 101: 488−498.

Hsiao T C, Heng L, Steduto P, Rojas-Lara B, Dirk R, Fereres E. Aqua Crop – The FAO crop model to simulate yield response to water: III. Parameterization and testing for maize. Agronomy Journal, 2009; 101(3): 448−459.

Sam-Amoah L K, Darko R O. Owusu-Sekyere J D. Water

requirement, deficit irrigation and crop coefficients of hot pepper (Capsicum frutescens var legon 18) using irrigation interval of two days. ARPN Journal of Agricultural and Biological Science, 2013; 8(2): 139−146.

Norman J C. Tropical vegetable crops, Arthur H. Stockwell Ltd.1992; Great Britain.

Steduto P, Hsiao T C, Raes D, Fereres E. AquaCrop-the fao crop model to simulate yield response to water: I. Concepts and underlying principles. Agronomy Journal, 2009; 101(3): 426−437.

Raes D, Steduto P, Hsiao T C, Fereres E. AquaCrop - The FAO crop model to simulate yield response to water. II. Main algorithms and software description. Agronomy Journal, 2009; 101(3): 438−447.




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