Maize (Zea mays L., 1753.) evapotranspiration and crop coefficient in semi-arid region of Ethiopia

Authors

  • Tatek Wondimu Negash Ethiopian Institute of Agricultural Research (EIAR), Melkassa Agricultural Research Center (MARC), P.O. Box 436, Adama, Ethiopia
  • Abera Tesfaye Tefera Ethiopian Institute of Agricultural Research (EIAR), Melkassa Agricultural Research Center (MARC), P.O. Box 436, Adama, Ethiopia https://orcid.org/0000-0002-3051-6767
  • Gobena Dirirsa Bayisa Ethiopian Institute of Agricultural Research (EIAR), Melkassa Agricultural Research Center (MARC), P.O. Box 436, Adama, Ethiopia

DOI:

https://doi.org/10.36253/ijam-2777

Keywords:

Maize, Crop Coefficient, Crop Evapotranspiration, Soil-water balance, Non-weighing Lysimeter., reference evapotranspiration

Abstract

Maize (Zea mays L.,1753) plays an important role in the economy of maize-growing nations. Supplying the right amount of water to a crop based on its needs is the main agenda for implementing water-saving agriculture. Non-weighting lysimeters were used to determine the actual crop evapotranspiration and crop coefficient of maize at the experimental farmland of the Melkassa Agricultural Research Center, Ethiopia. Soil-water balance approaches were applied to obtain actual crop evapotranspiration, while the Penman-Monteith technique was used to compute reference evapotranspiration. The growth stages-wise crop coefficient was calculated as the ratio of the actual crop evapotranspiration ratio to the reference evapotranspiration. The total seasonal maize actual crop evapotranspiration during the 2017 and 2018 experimental years was 503.7 and 511.06 mm, respectively. The 2-year average maize actual crop evapotranspiration was 507.4 mm. The mean locally developed actual crop coefficient values of 0.55, 1.19, and 0.56 were observed for the initial, mid, and end seasons, respectively. The FAO-adjusted crop coefficient for the mid-season was 1.15. The developed Kc values differed considerably from the FAO-adjusted Kc values. Therefore, the determination of actual crop evapotranspiration and crop coefficients for crop growth under local climatic conditions is vital for decision-making concerning agricultural water management in areas where irrigation is practiced.

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Published

2024-12-28

How to Cite

Negash, T. W., Tefera, A. T., & Bayisa, G. D. (2024). Maize (Zea mays L., 1753.) evapotranspiration and crop coefficient in semi-arid region of Ethiopia. Italian Journal of Agrometeorology, (2), 55–63. https://doi.org/10.36253/ijam-2777

Issue

No. 2 (2024)

Section

RESEARCH ARTICLES

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