Rama Talat Rashad( 2020). Effect of Soaking Seeds in Some Growth Regulators on Wheat Grown in Sandy Soil Egypt. J. Soil. Sci. Vol. 60, No. 2, pp. 99 - 108 (2020)
Abstract: ARESEARCH field experiment was carried out to study the effect of soaking wheat seeds before sowing in aqueous solutions of gibberellic acid GA3 (2 g L-1), Salicylic acid SA, humic acid HA and potassium humate K-H (6 g L-1 each) on wheat productivity under sandy soil conditions. Wheat yield (t ha-1) increased maximally by 4.57% for GA3 treatment while decreased by 7.65% for the HA treatment compared with the control. Seed yield (t ha-1) increased by 8.01% for K-H but decreased by 3.77% for HA. Shelling (%) increased significantly by 6.29% for K-H only, while decreased by 3.73% for GA3. Treatments significantly affected soil available Si and its uptake by growing plants. Available Si in soil (mg kg-1) decreased significantly (as %) in a descending order GA3 (23.39%) > HA (20.71%) > K-H (13.4%) > SA (7.55%), which may be due to significant consumption of Si from soil as uptake by plant. Total Si content (g kg-1) in wheat seeds increased significantly (as %) in the order GA3 (700%) > SA (672.73%) > HA (386.36%) but decreased by 22.73% for K-H for which Si-uptake decreased significantly by 16.54%. The studied plant growth regulators (PGRs) perhaaps affect the soaked wheat seeds physiologically and disrupt nutrient uptake from soil including N, P, K and Si. Pre-soaking in K-H can be recommended and preferable more than GA3, HA, and SA for health aspects and to avoid luxury consumption of Si by plant.
Keywords: (Growth regulators; Organic solutions; Sandy soil; Soaking seeds; Wheat.)
