Nitrogen and Potassium concentration in the nutrient solution affects growth, yield and physiology in bush snap beans

Authors : Manolo VALDEZ

Pages : 15-20

View : 18 | Download : 13

Publication Date : 2021-06-30

Article Type : Research Paper

Abstract :The study aimed to evaluate the effects of N-K concentration in the nutrient solution on the growth, yield, and physiological characters of two bush snap bean cultivars. ‘Torukatto’ exhibited a longer vine than `Super Light Green.` `Super Light Green` had a larger canopy, more leaves produced, greater leaf area, more shoots developed, and heavier shoot fresh and dry weights. `Super Light Green` produced a few flowers and low pod number and yield. `Torukatto` had a higher percent pod setting, but `Super Light Green` had a heavier weight per pod. There was a significant influence of N-K levels on leaf area and number of shoots produced. Increasing the N-K level slightly increased the leaf area. `Torukatto` had significantly higher SPAD values and rate of net photosynthesis than that of ‘Super Light Green’. The stomatal conductance and transpiration rate differed significantly between the cultivars. Increasing the N-K level markedly improved the physiological measurements at a slightly increasing trend. There was a strong correlation between yield and number of pods and between photosynthesis and leaf color.
Keywords : N K concentration, nutrient solution, bush snap bean, hydroponics