Evapotranspiration, crop coefficients, water depletion factor, and water use efficiency of bell pepper under shade net
Published 2026-09-23
Copyright (c) 2026 Jesús Enrique López Avendaño, José Angel Martínez Gallardo, Norma Delia Zazueta Torres, Mitzi Dayanira Estrada Acosta, Luis Alfonso Amarillas Bueno, Julio César Rodríguez, Fidencio Cruz Bautista, Martín Abraham Tirado Ramírez

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
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Abstract
Optimizing water use in agricultural irrigation is essential for water sustainability. This study aimed to determine evapotranspiration, crop coefficients (Kc), water depletion factor (f), and water use efficiency (WUE) for bell pepper grown under shade net conditions. Five treatments with three replications were evaluated for different f values (0.1, 0.2, 0.3, 0.4, and 0.5). Reference evapotranspiration (ET₀) was estimated using the FAO Penman-Monteith method, and crop evapotranspiration (ETc) was measured with volumetric lysimeters. Plant height, yield, ETc, and WUE were recorded. The best treatment (f = 0.1) achieved a plant height of 100.1 cm, yield of 76.7 ton ha⁻¹, ETc of 459 mm, and WUE of 16.7 kg m⁻³. The Kc values were 0.64, 1.02, and 1.09 for the initial, mid, and late growth stages, respectively.
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