Enhancing Spinach Productivity with Plant Acoustic Frequency Technology in Wick Hydroponics

Department of Biosystems Engineering, Faculty of Agricultural Technology, Universitas Brawijaya, Jl. Veteran, Malang, ZIP 65145, Indonesia

^* Corresponding author: yusuf_h@ub.ac.id

Abstract

Acoustic frequency has emerged as a promising non-invasive tool to enhance plant growth in controlled environments. This study investigates the effects of varying sound frequencies (3000 Hz, 8000 Hz, and 13,000 Hz) on the growth of spinach (Spinacia oleracea) in a wick hydroponic system. Spinach plants were exposed to Folk Pop music with specific frequency profiles for 3 hours daily over a 14-day period. Results indicated that exposure to 3000 Hz increased plant height by 18.5% and leaf area by 22.3% compared to the control, while higher frequencies (8000 Hz and 13,000 Hz) showed negligible effects. Greenness index values were also highest in the 3000 Hz group, demonstrating a significant correlation with enhanced chlorophyll content. These findings highlight the potential of specific acoustic frequencies to improve hydroponic spinach productivity. Practical implications include the integration of sound-based interventions for optimizing plant growth in resource-efficient agricultural systems.