SOUSA, Robson Alexsandro.; LACERDA, Claudivan Feitosa.; SOUSA, Carlos Henrique Carvalho.; ASSIS JÚNIOR, José Otacilio.; VIEIRA, Mauro Régis.; AMARO FILHO, Joaquim.
Resumen:
The water use of inadequate quality in the irrigation can cause serious damages as
much to the soil how much to the plants. The objective of this work was to evaluate the effect of
salinity and chemical composition of irrigation water on plant growth of cowpea plants [Vigna
unguiculata (L.) Walp.] cv. Pitiúba. Plants were cultivated in plastics pots, using 22 kg of soil at
greenhouse conditions and subjected to four different salt stress concentrations (0,5; 1,5; 3,0 and 4,5
dS.m-1) in irrigation water obtained by adding NaCl, CaCl2.2H2O and MgCl2.6H2O (A1); a mixture of
chloride, sulphate, carbonates, and bi-carbonates salts (A2), or alone NaCl (A3). A completely
randomized design, in a factorial arrangement (3 x 4), with five replicates was adopted. After 48 days
sowing they were measured fresh and dry masses of leaves, stems and roots. The salinity of irrigation
water caused reduction in the biomass production, but it was not observed effects of the chemical
composition of water on these parameters.
