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Parameterization of the AquaCrop model for cowpea and assessing the impact of sowing dates normally used on yield

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  • Nunes, H.G.G.C.
  • Farias, V.D.S.
  • Sousa, D.P.
  • Costa, D.L.P.
  • Pinto, J.V.N.
  • Moura, V.B.
  • Teixeira, E.O.
  • Lima, M.J.A.
  • Ortega-Farias, S.
  • Souza, P.J.O.P.

Abstract

The AquaCrop model was evaluated considering a data set from a cowpea (BR3-Tracuateua cultivar) cultivation in Castanhal/Brazil under different irrigations during the reproductive phase, which is sensitive to water deficit. Data on leaf area index (LAI), soil water content (SWC), biomass, and final yield of two harvests were used for model calibration (2013) and validation (2014). LAI data were used for parameterization of canopy cover (CC), and some crop parameters obtained in the field. The model was also used to evaluate the impacts of sowing dates, as well as the strategy of using an economical irrigation threshold (60% of Readily Available Water) on the water use and crop yield. Regarding the results after parameterization of the canopy cover curve, the model efficiency index (EF) presented a satisfactory performance (0.98), which is due to the high correlation coefficient (R2 = 0.99) between the simulated and observed values and the low values of normalized root mean square error (NRMSE < 6.33%). For model performance in simulating SWC, there was high efficiency (EF > 0.70) for all treatments, with low estimated errors and NRMSE representing 8.12% of mean SWC observations during validation, indicating high precision for simulation of biomass and cowpea yield. The model performance index ranged from 0.92 to 0.94 for biomass and from 0.92 to 0.99 for final yield. These results showed that AquaCrop is suitable for simulating biomass production and yield of cowpea. Additionally, sowing in early April is appropriate for better water use and productivity and the tested irrigation threshold can be indicated to significantly improve final crop yields.

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  • Nunes, H.G.G.C. & Farias, V.D.S. & Sousa, D.P. & Costa, D.L.P. & Pinto, J.V.N. & Moura, V.B. & Teixeira, E.O. & Lima, M.J.A. & Ortega-Farias, S. & Souza, P.J.O.P., 2021. "Parameterization of the AquaCrop model for cowpea and assessing the impact of sowing dates normally used on yield," Agricultural Water Management, Elsevier, vol. 252(C).
  • Handle: RePEc:eee:agiwat:v:252:y:2021:i:c:s0378377421001451
    DOI: 10.1016/j.agwat.2021.106880
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    References listed on IDEAS

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    1. Rooholla Moradi & Alireza Koocheki & Mehdi Nassiri Mahallati & Hamed Mansoori, 2013. "Adaptation strategies for maize cultivation under climate change in Iran: irrigation and planting date management," Mitigation and Adaptation Strategies for Global Change, Springer, vol. 18(2), pages 265-284, February.
    2. Paredes, P. & Wei, Z. & Liu, Y. & Xu, D. & Xin, Y. & Zhang, B. & Pereira, L.S., 2015. "Performance assessment of the FAO AquaCrop model for soil water, soil evaporation, biomass and yield of soybeans in North China Plain," Agricultural Water Management, Elsevier, vol. 152(C), pages 57-71.
    3. Pereira, Luis S. & Paredes, Paula & Rodrigues, Gonçalo C. & Neves, Manuela, 2015. "Modeling malt barley water use and evapotranspiration partitioning in two contrasting rainfall years. Assessing AquaCrop and SIMDualKc models," Agricultural Water Management, Elsevier, vol. 159(C), pages 239-254.
    4. Wellens, Joost & Raes, Dirk & Traore, Farid & Denis, Antoine & Djaby, Bakary & Tychon, Bernard, 2013. "Performance assessment of the FAO AquaCrop model for irrigated cabbage on farmer plots in a semi-arid environment," Agricultural Water Management, Elsevier, vol. 127(C), pages 40-47.
    5. Katerji, Nader & Campi, Pasquale & Mastrorilli, Marcello, 2013. "Productivity, evapotranspiration, and water use efficiency of corn and tomato crops simulated by AquaCrop under contrasting water stress conditions in the Mediterranean region," Agricultural Water Management, Elsevier, vol. 130(C), pages 14-26.
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    1. Wang, Haidong & Cheng, Minghui & Liao, Zhenqi & Guo, Jinjin & Zhang, Fucang & Fan, Junliang & Feng, Hao & Yang, Qiliang & Wu, Lifeng & Wang, Xiukang, 2023. "Performance evaluation of AquaCrop and DSSAT-SUBSTOR-Potato models in simulating potato growth, yield and water productivity under various drip fertigation regimes," Agricultural Water Management, Elsevier, vol. 276(C).

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