Journal Article
Water requirement and single and dual crop coefficients of sesame cultivated in the coastal tablelands of Brazil
Julianna Catonio da Silva; George do Nascimento Araújo Júnior; Adolpho Emanuel Quintela da Rocha; Thieres George Freire da Silva; Iêdo Peroba de Oliveira Teodoro; José Wanderson Silva dos Santos; Márcio Aurélio Lins dos Santos; Iêdo Teodoro; Gustavo Bastos Lyra; Ceres Duarte Guedes Cabral de Almeida; Alexsandro Claudio dos Santos Almeida
Irrigation and Drainage · Vol. 74, Issue 1 · pp. 216-236 · 2025
Abstract
Sesame irrigation is essential in drought‐prone regions. However, information about the water needs of sesame is scarce. Therefore, the objective of this study was to determine crop evapotranspiration (ET c ) and the sesame crop coefficient ( K c ) during the rainy (S1) and dry (S2) seasons in the coastal tablelands of Alagoas, Brazil. The BRS Seda cultivar was grown in Rio Largo, Alagoas, Brazil, between 2021 and 2022. A system with 25 drainage lysimeters was installed to estimate the daily and cumulative ET c and the K c for the entire crop cycle. The ET c was partitioned into transpiration ( T ) and evaporation ( E ), and the basal crop coefficients ( K cb ) and soil evaporation coefficients ( K e ) were subsequently estimated. The daily and cumulative ET c were 3.04 mm day −1 and 450.4 mm cycle −1 , respectively, in S1 and 3.52 mm day −1 and 440.1 mm cycle −1 , respectively, in S2. Regardless of the season, T was the main water flux (74%–80% of the ET c ). The mean values of K c were similar for S1 (0.79) and S2 (0.75), and K cb and K e followed the same trend as T and E , respectively. The accumulated ET c and K c of sesame cultivated in the coastal tablelands of Alagoas, Northeast Brazil, are similar for the rainy and dry seasons.