A Note on the Impact of Red-Sea Dilutions on Germination and Growth of Pearl Millet (Pennisetum glaucum L.) and Sorghum (Sorghum bicolor L.)

Mohamed Suliman Mohamed Ahmed, M. A. Mustafa

Abstract


Two pot experiments were conducted to investigate the effect of diluted Red Sea water on millet and sorghum germination and growth on a loamy sand soil. The first experiment consisted of five mixed Red Sea–tap water of differing salinity levels; namely, 0.4 (tap water), 3.1, 5.5, 9.3 and 16.6 dS/m, and millet with three replicates. The second experiment consisted of the first four water salinity levels, three sorghum varieties; namely, Aklomoy, Wad Ahmed and R5 with four replicates. The treatments in both experiments were arranged in a completely randomized pot design. Germination percentage increased linearly with increase of time and leveled off after one week. Germination versus time relationships for the four crops significantly fitted quadratic trend lines. Furthermore, germination percentage and plant height of the four crops decreased, significantly and linearly, with increase of the electrical conductivity of the mixed sea-tap water. High salinity levels delayed germination for 2 to 3 days. The salt tolerance for seed germination was in the following order: Wad Ahmed > Millet > R5 > Aklomoy.

Keywords


Salt tolerance;sorghum; millet

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