Effect of Ratios of Red and White Light on the Growth and Quality of Pak Choi

The effects of different ratios red:white light on the biomass, photosynthetic capacity, phytochemical accumulation, and antioxidant capacity pak choi were investigated. There three treatments: = 1:2 (LR), 1:1 (MR), 2:1 (HR) with white as control (CK) at photon flux density (PPFD) 250 μmol·m−2·s−1. In LR treatment, chlorophyll fluorescence nitrate content reduced, while rate (Y(ll)), contents soluble protein, sugar, vitamin C, flavonoids, polyphenols, glucosinolates, FRAP, 2,2-diphenyl-1-bitter acyl radical scavenging increased. was enhanced in MR glucosinolate increased HR treatment. most suitable for cultivation plant factory 1:2.