MAIA FILHO, F. C. F.; MAIA FILHO, Francisco das Chagas Fernandes.
Abstract:
A major problem faced by farmers around the world is the quality of irrigation water,
mostly water with high electrical conductivities, this very problem faced in Brazil,
especially in the Northeast. The cowpea, also known as bean-to-string-bean or cowpea,
constitutes the main subsistence crop in North and Northeast Brazil. Thinking it aimed
to this research to evaluate the cultivation of cowpea genotypes irrigated with saline
water at different growth stages, being developed in a greenhouse at the Federal
University of Campina Grande, using a completely randomized design with five
replications in a combination of two factors: salinity in irrigation water (0.8 dS m-1 and
5.0 dS m-1) and two cowpea (BRS - Itaim and BRS- Xiquexique) at four growth stages
(V3, V6, R1 and R3) totaling 80 experimental units. The salinity in irrigation water
caused damage to both cowpea genotypes studied. The phenological stage V3 the most
tolerant to salinity in irrigation water and R1 and R3 the most sensitive stages. The
genotypes behaved differently, depending on each phenological stage.