Crescimento inicial de duas cultivares de milho submetidas a quatro níveis hídricos

Abstract

This study aimed to evaluate the effect of different water levels on the germination and initial growth of two maize cultivars (P3845VYHR and P3707VYHR). The experiment was conducted at the Agricultural Laboratory, located at the Federal Institute of the State of Piauí, PI, on the Campus Uruçuí. A completely randomized experimental design in a 2 x 4 factorial scheme was used, with seven replications. The water stresses used presented the following values of applied potable water (100; 75, 50 and 25%) according to the container capacity (CR). The germination rate of the cultivars was evaluated and after 20 days the fresh mass of the aerial part (MPA), of the root (MFR), and total (MFT), the number of leaves (NF) and seedling height (AP), dry mass of the aerial part (MSPA), of the root (MSR) and total (MST) were determined, subjected to Tukey's test, at 5% probability, using the statistical program R, version 4.5.2. Results showed that in all variables studied, both cultivars P3707YHR and P3845VYHR exhibited better initial growth development at 100% water capacity.