Estratégias de manejo da salinidade da água no cultivo de genótipos de gergelim.

Abstract

This research was developed with the objective of evaluating the growth and production of sesame genotypes as a function of saline water use strategies. The experiment was carried out under protected environment conditions in Pombal-PB. A randomized block design in a 6 x 2 factorial scheme was used, and the treatments consisted of six strategies of use with saline water applied at different stages of plant development (SE = no stress throughout the crop cycle; LV = stress saline in the vegetative phase; FL = saline stress in the flowering phase; FR = saline stress in the fruiting phase; VE / FL = saline stress in the vegetative and flowering phase; LV / FR = saline stress in the vegetative and fruiting phase) and two sesame genotypes (BRS Seda and BRS Anahí) with 4 repetitions. Irrigation with 3.5 dSm-1 electrical conductivity water in the vegetative / flowering and vegetative / fruiting phases reduces the growth and yield of sesame plants. Higher growth in BRS Seda sesame plants compared to BRS Anahí genotype results in increase in total number of fruits and total seed mass. There was no significant interaction between saline water use strategies and genotypes for any of the variables analyzed at 150 days after sowing.