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Modeling the Impact of Deficit Irrigation on Corn Production

Author

Listed:
  • Marilyn S. Painagan

    (Department of Agricultural & Biosystems Engineering, College of Engineering and Information Technology, University of Southern Mindanao, Kabacan 9407, Philippines)

  • Victor B. Ella

    (Land and Water Resources Engineering Division, Institute of Agricultural and Biosystems Engineering, College of Engineering and Agro-Industrial Technology, University of the Philippines Los Baños, Los Banos 4031, Philippines)

Abstract

Deficit irrigation or intentional under-irrigation offers the potential for sustainable water resources management. The DSSAT CERES-Maize and AquaCrop models were coupled to simulate the effects of deficit irrigation on corn yield and water productivity. The models were calibrated and validated using observed values of crop and biomass yield under 40%, 50%, 60%, 70%, and 80% depletion of the available soil water. Model simulation results showed that a 15% level of deficit irrigation results in maximum yield while a 60% level of deficit irrigation leads to maximum water productivity. Results suggest that it is not necessary to use large amounts of water in order to obtain high crop yield. The net irrigation application depths ranged from 60 mm to 134 mm, with a depth of 77 mm as optimum under 60% deficit irrigation when applied at the start of tasseling to grain filling. This study demonstrated the applicability of deficit irrigation as a water-saving management strategy for corn production systems. Crop models such as DSSAT CERES-Maize and AquaCrop proved to be viable tools to support decision making in corn production systems in the Philippines, especially when employing deficit irrigation.

Suggested Citation

  • Marilyn S. Painagan & Victor B. Ella, 2022. "Modeling the Impact of Deficit Irrigation on Corn Production," Sustainability, MDPI, vol. 14(16), pages 1-13, August.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:16:p:10401-:d:894060
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    References listed on IDEAS

    as
    1. Geerts, Sam & Raes, Dirk, 2009. "Deficit irrigation as an on-farm strategy to maximize crop water productivity in dry areas," Agricultural Water Management, Elsevier, vol. 96(9), pages 1275-1284, September.
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    Cited by:

    1. Xufeng Li & Juanjuan Ma & Xihuan Sun & Lijian Zheng & Ruixia Chen & Jianglong An, 2023. "Estimating the Effects of Deficit Irrigation on Water Absorption and Utilization of Tomatoes Grown in Greenhouse with Hydrus-1D Model," Sustainability, MDPI, vol. 15(4), pages 1-17, February.

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