Effect of Spraying with Potassium and Kinetin on Specific Physiological and Productive Characteristics of Three Mungbean Genotypes (Vigna Radiata L.)

Abstract

A field experiment was carried out in the fall season of 2019 in Anbar Governorate, Al-Khalidiya city, located at longitude °43.46 and latitude ° 33.41, in order to study the effect of foliar nutrition with three concentrations of potassium (0, 400, and 800 mg.L-1). Combined with, three concentrations of kinetin (0, 100, and 200 mg.L-1) on the physiological and productive characteristics of three Mungbean genotypes (Local Khadrawy, Green Indian VC6089A10, and Black Indian GOLDSTAR). The experiment was implementedby the arrangement of the split-split plot using the Randomized Complete Block Design (RCBD) with three replicates. Thus, the genotypes represented the Main plots, and kinetin represented the Sub-plots, while potassium represented the Sub-subplots. The study findings showed that the potassium concentration of 800 mg K.L-1 gave the highest average for leaf area, potassium content in leaves, number of pods/plants, fertility percentage in pods, and seed yield. Whereas, the concentration of 400 mg K.L-1 gave the highest activity of nitrate reductaseenzyme (NR) and the highest average of the pod length. In the same role, the foliar nutrition with a concentration of kinetin 200 mg.L-1 achieved the highest potassium content in leaves and the highest activity of nitrate reductaseenzyme (NR). It also gave the highest average of the number of pods/plants, pod length, fertility percentage per pod, and seed yield per unit area. On the other hand, the local genotype was superior in the two characteristics of leaf area and the number of pods/plants, while the green Indian genotype was superior in the potassium content, NR enzyme activity, pod length, and seed yield, while the black Indian genotype was superior atfertility percentage per pod.