Effects of Potassium Foliar Spray and Water Stress on Mungbean (Vigna Radiata L.) Growth

Abstract

An experiment was carried out by using pots during the growing season of 2017 in a private nursery in Baghdad governorate to study the effect of three concentrations of potassium (K2SO4) (0, 100, and 200) mg. L-1 and three treatments of water stress were irrigation every three days (control), irrigation every sex days, and irrigation every nine days, and their interaction on growth and yield of Vigna radiata L. plant, The experiment was designed according to a Completely Randomized Design (CRD) with three replications.

 The results showed that the effect of water stresses especially from nine days significant reduction in the rates of studied characteristics: plant height, dry weight, pod number, pod length, seed number, seed weight, chlorophyll content, nitrogen percentage, phosphorus percentage, and potassium percentage; by 19.5%, 19.40%, 24%, 4.01%, 19%, 8.43%, 4.72%, 18.40%, 30%, and 22% compared with control respectively. while the potassium-sparing showed a significant increase in the rates of studied characteristics, especially a concentration of 200 mg. L-1, the plant height by 60.54%, dry weight by 115%, pods number by 72%, pods length by 55.75%, seeds number by 76.6%, seeds weight by 20.78%, chlorophyll content by 58.70%, nitrogen percentage by 31.84%, phosphorus percentage by 176% and potassium percentage by 40% compared with control. The results showed a significant effect of interaction between both factors in all studied characteristics especially concentration of potassium 200 mg. L-1 and water stress sex days.