Summary
This split-plot pot experiment investigated the interactive effects of supplementary light (control, 60% red+40% blue, and 90% red+10% blue wavelengths) and foliar calfomyth (calcium-phosphorus) application on biochemical quality traits in tomato (cv. 240) under soilless culture. Higher proportions of red light maximised vitamin C (16.1 mg/g FW), soluble solids (12.33 mg/g FW), and lycopene (2.95 mg/g FW), whilst higher blue light increased leaf chlorophyll (38.4 mg/g FW). Calfomyth spray showed positive effects on most traits compared to control, though beta-carotene was unaffected by either treatment.
Regional applicability
This controlled-environment pot study conducted under soilless culture in Iran has limited direct application to United Kingdom field production systems. However, findings on light spectrum optimisation for tomato phytochemical content may inform UK glasshouse production practices, though cultivar responsiveness and UK-specific growing conditions would require independent validation.
Key measures
Vitamin C (mg/g FW fruit), soluble solids (mg/g FW fruit), lycopene (mg/g FW fruit), leaf chlorophyll content (mg/g FW leaf), titratable acidity, beta-carotene content
Outcomes reported
The study measured vitamin C, soluble solids, lycopene, leaf chlorophyll content, titratable acidity, and beta-carotene in tomato fruit under varying red/blue light ratios and calfomyth (Ca and P) foliar spray. Higher red light proportion increased vitamin C, soluble solids, and lycopene; higher blue light increased chlorophyll; calfomyth spray improved most traits.
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