Salicylic Acid and Superabsorbent Polymer Interaction Effects on Yield and Yield Components in Mung Bean (Vigna radiata Wilczek) under Different Water Regimes

In order to investigate the effects of salicylic acid and superabsorbent polymer on yield and yield components in mung bean under different water regimes, a factorial experiment was conducted in complete randomized design with three replications in greenhouse of Razi University. Treatments included drought stress at three levels (30, 60 and 100% of FC), superabsorbent at three levels (0, 0.3 and 0.5% by weight) and salicylic acid at four levels (0, 250, 500 and 750 μM). The results showed that the highest grain yield (20.7 g per plant), biological yield (51.4 g/plant) and number of seeds per plant (79.1) were observed in 100% FC and application of 0.3% superabsorbent and 750 μM salicylic acid and the lowest values (0.13 and 7.5 g per plant and 16.2 seeds per plant, respectively) were obtained in 30% FC and no superabsorbent and salicylic acid treatments. In general, the concentration of 500 μM salicylic acid and 0.3% by weight of superabsorbent could neutralize the effects of severe drought stress.