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Sudan Journal of Agricultural Research

Effect of temperature, soil type, sowing depth and irrigation interval on the growth of Tabar Ipomoea cordofana and Siha Blepharis persica.


O. E. Mohamed¹and H. A. Mohamed¹


Abstract:

Temperature responses of Tabar and Siha during germination were investigated in temperature controlled incubators at various constant temperatures between 5 and 50°C. Vegetative growth and development of Tabar and Siha were investigated on three soil types using three irrigation intervals and three sowing depths. In both species the germination percentage was maximum at 35°C. The germination was totally inhibited below 10 °C and above 45°C. Both species gave higher emergence percentages and produced taller plants, more branches, more leaves and higher dry weights in soils composed of equal proportions of clay and sand in both seasons and when irrigation was applied at three weeks intervals. On the other hand, Tabar showed the best performance when sown at a depth of 5.0 cm while Siha showed a better growth when sown at the soil surface.

Keywords:

Sudan Journal of Agricultural Research Vol. 1 (1998) PP. 35-39