Gibberellic Acid and Salicylic Acid on the Growth and Yield of Kale under Kratky Method Hydroponic System
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Abstract
Phytohormones are organic compounds, other than nutrients, that modify plant physiological processes, act inside plant cells to stimulate or inhibit specific enzymes or enzyme systems, and help regulate plant metabolism. In this work, the effectiveness of foliar application of gibberellic acid (GA3) and salicylic acid (SA) on the growth and yield of kale cultivated in a hydroponic system was evaluated. The study was conducted in a completely randomized design to determine the effectiveness of gibberellins and salicylic acid. The study demonstrated that the addition of 25 ppm GA3 + 200 ppm SA stimulated plant growth and enhanced yield. GA3 + SA treatments enhanced various morphological traits. Plant height is 37.77cm ± 0.08, fresh weight at 54.05g ± 0.44, root weight at 17.35g ± 0.21, whole plant at 71.41g ± 0.34, number of leaves at 11.73 ± 0.03, TSS and TA at 1.07 ± 0.02 and 0.56 ± 0.03, respectively. The application of growth hormones had a significant influence on all evaluated plant growth parameters, demonstrating that the combined application can markedly enhance overall plant growth and development. This highlights the potential of growth regulators as practical tools for optimizing physiological processes and improving crop performance in a hydroponic system.
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