2025-07-032025-07-032021-10-08https://repositorio.ifal.edu.br/handle/123456789/1011The deficit of water in the soil promotes physiological responses in the plant capable of altering the growth, development and yield of the crop, in which it is essential to study the behavior of the plant against water stress to determine the proper management of irrigation. This project aimed to evaluate the effect of water deficit on different phenological stages of corn in the semiarid region. The experiment was conducted at the Federal Institute of Alagoas/Campus Piranhas, from February to June 2019, the experimental design used in the experiment was strips with four replications, in which the treatments were five periods of submission of the crop to deficit stress water, which occurred from the following phases: tanning, pollination, milky grain, pasty grain and farinaceous grain (without stress). From the data collected during the experiment, the following steps were followed:estimation crop evapotranspiration (ETc), analysis of the effect of climatic elements on the crop, evaluation of plant growth, determination of productivity and evaluation of ear variables under the effect of water deficit, and verification of the level of impact of water stress caused in each phenological phase of the crop. Plants subjected to water deficit in the tasseling and flowering phases suffered variation, leaf area index (LAI), number of grains per spike, dry weight of a thousand grains and low yield when compared with plants subjected to the farinaceous grain phase. Radiation, air temperature and humidity do not dissipate in the thermal limitation for corn development throughout the cycle. Plants subjected to water deficit in the tasseling and flowering phase were less productive when compared to plants grown under full irrigation.pt1.Umidade do soloÁrea foliarProdutividadeMilhoTrabalho de Conclusão de CursoCIENCIAS AGRARIAS