Copyright (c) 2025 Journal of Agricultural Research

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A study was conducted during the dry season from 2020 to 2023, with the aim of quantifying the effect of water deficit on the different phenological stages of corn cultivation. The study was carried out at the El Ejido-Los Santos Experimental Station. The experimental unit consisted of six rows 5.2 m long. Four stress levels were evaluated at different stages of the crop and two hybrids. To establish the different levels of water deficiency, drip irrigation was suspended after reaching the indicated date until the end of the same. The treatments had a 4 x 2 Strip Factorial arrangement in a Randomized Complete Block design with three replications. The relative and absolute growth rates were calculated for each treatment. The climatic variables were obtained from a Davis-type portable meteorological station. Statistical analysis indicated highly significant differences for the Water Deficiency Stage Factor for almost all variables. It was observed that grain drying stress (85 to 110 das) did not differ statistically from plots without water deficit (irrigation throughout crop development), which showed grain yields of 5.32 and 5.24 tha-1, respectively. The pre-flowering phase was the least affected, with a 26 % reduction. Meanwhile, the flowering and grain filling stages (50 to 84 das) were the most affected, with a 55 % yield reduction.