عنوان مقاله [English]
AquaCrop model simulates biomass yield under deficit irrigation management. This model developed by FAO and requires less input data than other similar models. One of the input data of this model is the normalized water productivity (wp*) that should be known for each plant. This parameter for the radish plant, which is part of the C3 plant, has not yet been determined. Therefore, the first objective of this study is to determine it for Pakdasht area and its second objective is to analyze the sensitivity of the Aquacrop model to the input data of reference evapotranspiration (ETo), Wp*, initial canopy cover (CCo) and maximum canopy cover(ccx). This research was carried out in the research center of Abourayhan Campus, University of Tehran in Pakdasht District during 2018 crop year. According to the results of this study, normalized water productivity of radish was determined to be 11.3 g / m2. The results of sensitivity analysis showed that the AquaCrop model has the most sensitivity to the normalized water productivity parameter for full irrigation conditions, in which the sensitivity coefficient was estimated to be 0.88. Under deficit condition, the model is most sensitive to the ETo parameter, and the less irrigation is more severe, the sensitivity coefficient increases. The sensitivity coefficient for 60% deficit irrigation was -10.99.
Abedinpour M., Sarangi A., Rajput T. B. S., Singh M., Pathak H. and Ahmad T. (2012). Performance evaluation of AquaCrop model for maize crop in a semi-arid environment. Agricultural Water Management, 110, 55-66.
Alizadeh H. A., Nazari B., Parsinezhad M., RAMAZANI E. H. and Janbaz H. R. (2010). Evaluation of AquaCrop model on wheat deficit irrigation in Karaj area. Iranin Journal of Irrigation and Drainage,4(2), 273-283. [in Persian]
Allen R. G., Pereira L. S., Raes D. and Smith M. (1998). Crop evapotranspiration-Guidelines for computing crop water requirements-FAO Irrigation and drainage paper 56. Fao, Rome.
Beven K. (1979). A sensitivity analysis of the Penman-Monteith actual evapotranspiration estimates. Journal of Hydrology, 44(3-4), 169-190.
Haydarinia M., Naseri. A. A. and Broomand-Nasab. S. (2012). Investigate the possibilitiy of application of AquoCrop model for irrigation scheduling of sunflower in Ahwaz. Journal of Water Resources,5(1), 39-41. [in Persian]
Iqbal M. A., Shen Y., Stricevic R., Pei H., Sun H., Amiri E. and del Rio S. (2014). Evaluation of the FAO AquaCrop model for winter wheat on the North China Plain under deficit irrigation from field experiment to regional yield simulation. Agricultural Water Management, 135, 61-72.
Khalili N., Davary K., Alizadeh A., Kafi M., and Ansari H. (2014). Simulation of Rainfed wheat yield using AquaCrop Model, Case Study: Sisab Rainfed Researches Station, Northern Khorasan area Journal of Water and Soil, 28(5), 930-939. [in Persian]
Karimi Avargani H., Rahimikhib A. and Nazari Fard M.(2015). Calibration and verification of AquaCrop model for barley in Pakdasht area Iranian Water and soil research,74(3), 579. [in Persian]
Kim D. and Kaluarachchi J. (2015). Validating FAO AquaCrop using Landsat images and regional crop information. Agricultural Water Management, 149, 143-155.
Mohammadi M., Davary K., GHahreman B., Ansari H., and Haghverdi A. (2015). Calibration and validation of the aquacap model for the simulation of spring wheat yield under stress at the same time, salinity and drought. Journal of Water Research in Agriculture,29(3), 278-295. [in Persian]
Rahimikhoob H., Sotoodehnia A. and Massahbavani A. R. (2014). Calibration and evaluation of AquaCrop for Maize in Qazvin region. Iranian Journal of lrrigation and Drainage, 8(1), 108-115. [in Persian]
Steduto P., Hsiao T. C., Raes D. and Fereres E. (2009). AquaCrop—The FAO crop model to simulate yield response to water I. Concepts and underlying principles. Agronomy Journal. 101(3), 426-437.
Zhang W., Liu W., Xue Q., Chen J. and Han X. (2013). Evaluation of the AquaCrop model for simulating yield response of winter wheat to water on the southern Loess Plateau of China. Water Science and Technology, 68(4).