Effects of Supplemental LED Spectral Composition and Irrigation Electrical Conductivity on Vegetative Biomass, Fruit Yield and Quality, and Lighting Electrical Cost in Greenhouse Strawberry Production

Summary

Greenhouse strawberry production has rapidly increased around the world, since greenhouse production allows for protection from adverse weather events and optimized climate control. During the winter months, supplemental electric lighting is essential to maintain production. However, the use of supplemental lighting can account for up to 30% of operating expenses, impacting the profitability of production. In addition, strawberries are prized for their taste, so maintaining fruit quality during production is essential. This study examined the impact four different supplemental overhead LED spectral lighting treatments (red–blue (95% red, red-rich), pink, warm white, and white) and two different irrigation electrical conductivity (EC) levels (low = 2 mS cm−1 and high = 3 mS cm−1) on morphol