EFFECT OF DIFFERENT CONCENTRATIONS OF SODIUM CHLORIDE (NaCl) ON THE VEGETATIVE GROWTH OF THREE VARIETIES OF COWPEA (Vigna unguiculata L.)

Lawal, Amudalat Ranti School of Basic and Remedial Studies
Kwara State College of Education, Ilorin

Abstract

In this study effect of different concentrations of Sodium io ide (NaCl) on the vegetative growth of cowpea (Vigna sp.) varieties (Ife- brow 5 and IAR-48) were studied. The experiment was arranged in a complete randomized design in the biological garden of Kwara State College of Education, Ilorin. Sodium chloride was applied to the plants at 10, 20 and 30g/l. The shoot growth of cowpea varieties were inhibited by salt stress. NaCl significantly decreased leaf production, leaf number and leaf area. The result showed that in all the varieties of plants studied, as the concentration of NaCl increases, there was progressive reduction in the parameters measured. Among the cowpea varieties studied, IAR-48 was the most sensitive to salt treatment while Ife-brown showed better results followed by IT90K-82 in respect to salt tolerance.

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